All tools
Every tool on Toolnest, grouped by category — no signup, no tracking.
Health & Fitness
Browse all health & fitness→- BMI CalculatorCalculate your Body Mass Index with kg/lbs and cm/ft support.
- Calorie CalculatorCalculate TDEE and daily calorie needs from age, weight, height, and activity.
- Weight Loss CalculatorCalculate how long to reach your goal weight based on weekly loss rate.
- Sleep CalculatorFind the best wake-up times based on 90-minute sleep cycles.
- Wake Up CalculatorCalculate the best bedtime based on your desired wake-up time and sleep cycles.
- Bra Size CalculatorCalculate your bra size in US, UK, EU, and Australian sizes.
- Period CalculatorPredict your next period, ovulation date, and fertile window.
- Pregnancy CalculatorCalculate your pregnancy due date, current week, and trimester.
- Ovulation CalculatorCalculate ovulation date and fertile window based on your cycle length.
- Hydration CalculatorEstimate your daily hydration target from body weight, activity, and climate.
- Water Intake CalculatorDaily water intake target from body weight, sex, exercise, and pregnancy status.
- Caffeine CalculatorTrack caffeine still in your system using half-life decay across multiple drinks.
- Heart Rate Zone CalculatorCalculate 5 training heart-rate zones using Karvonen or %MHR.
- Max Heart Rate CalculatorEstimate your maximum heart rate from age using Tanaka, Fox, Gulati, and Nes.
- VO₂ Max CalculatorEstimate VO₂ max from the Cooper run, Rockport walk, or resting heart rate.
- One Rep Max CalculatorEstimate your 1RM from a submaximal set using Epley, Brzycki, Lombardi, and O'Conner.
- Workout Reps CalculatorConvert between %1RM, working weight, and reps using the NSCA reference table.
- Exercise Time CalculatorCalculate calories burned from activity, duration, and weight using METs.
- Running Pace CalculatorSolve for pace, time, or distance with a split table for any race target.
- Children BMI CalculatorCalculate a child's BMI and CDC BMI-for-age percentile from age, sex, weight, and height.
- Pediatric Growth ChartLook up a child's height-for-age and weight-for-age CDC percentiles by sex.
- Blood Sugar ConverterConvert blood glucose between mg/dL and mmol/L with ADA reference bands.
- LDL Cholesterol CalculatorEstimate LDL cholesterol from a lipid panel using the Friedewald formula.
- Vitamin D CalculatorLook up daily vitamin D intake recommendations by age and life stage.
- Conception CalculatorEstimate conception date and fertile window from LMP or due date.
- Pregnancy Week CalculatorFind how many weeks pregnant you are from your last menstrual period.
- Trimester CalculatorFind your current pregnancy trimester and the calendar boundaries for each.
- Gestational Age CalculatorCalculate gestational age in weeks + days from LMP or ultrasound CRL.
- Fetal Weight EstimatorLook up the Hadlock 50th-percentile fetal weight by gestational age.
- BMR CalculatorEstimate Basal Metabolic Rate with Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle.
- Macro CalculatorConvert daily calories into carb, protein, and fat grams using presets or custom %.
- Carb CalculatorDaily carb grams from total calories and a 5–65% slider with IOM AMDR guidance.
- Protein CalculatorDaily protein grams from bodyweight, training goal, and meals per day.
- Fat CalculatorDaily fat grams from calories plus saturated and unsaturated targets.
- Calorie Deficit CalculatorTarget intake and timeline to reach a goal weight at mild, moderate, or aggressive deficits.
- TDEE CalculatorTotal Daily Energy Expenditure from Mifflin-St Jeor BMR × activity factor.
- NEAT CalculatorEstimate non-exercise activity thermogenesis from steps, occupation, and fidget level.
- Body Fat CalculatorUS Navy body-fat % from neck, waist (+ hip for women) and height, plus fat and lean mass.
- Ideal Weight CalculatorCompare Devine, Robinson, Miller, and Hamwi ideal-weight formulas with a median.
- Muscle Gain CalculatorDaily calories, protein, and weekly gain projection for lean, standard, or aggressive bulks.
- Body Recomposition CalculatorCalorie-cycled training-day and rest-day targets plus weeks to goal body-fat %.
Finance & Business
Browse all finance & business→- Tip CalculatorCalculate tip, total, and per-person split for any bill.
- Discount CalculatorCompute sale price, savings, and effective discount percentage.
- Sales Tax CalculatorAdd sales tax to a price or extract tax from a total.
- Markup CalculatorCalculate selling price from cost and markup or vice versa.
- Markup and Discount CalculatorApply markup then discount to a cost to see the final price and net profit.
- Profit Margin CalculatorFind gross profit margin from revenue and cost.
- Profit and Loss CalculatorCalculate net profit or loss from revenue and a list of expenses.
- ROI CalculatorCalculate return on investment and annualized ROI.
- Compound Interest CalculatorGrow a lump sum with optional contributions at any compounding frequency.
- Interest CalculatorCalculate simple or compound interest on a principal.
- Savings CalculatorProject savings balance from initial deposit and monthly contributions.
- Future Value CalculatorFind the future value of a lump sum and/or recurring payments.
- Present Value CalculatorDiscount a future amount or annuity back to today's value.
- Annuity CalculatorCompute the present or future value of an annuity stream.
- Investment Return CalculatorCalculate total return, gain, and CAGR for any investment over time.
- Net Worth CalculatorCalculate your net worth by listing assets and liabilities with totals.
- Emergency Fund CalculatorCalculate how much you need for an emergency fund and how long it will take to save.
- Expense SplitterSplit a bill evenly across a group or by weighted shares per person.
- Gift Budget SplitterAllocate a gift budget across recipients by weighted share.
- Per Diem CalculatorCalculate per diem reimbursement from lodging, M&IE, full days, and travel days.
- Fuel Cost CalculatorCalculate trip fuel cost from distance, fuel efficiency, and price per unit.
- Utility Bill CalculatorEstimate an electricity, gas, or water bill from usage, rate, fixed fee, and tax.
- Break-Even CalculatorFind break-even units and revenue from fixed costs, price, and variable cost per unit.
- Burn Rate CalculatorCalculate startup gross and net monthly burn from cash balance or P&L inputs.
- Runway CalculatorCalculate startup runway in months and the projected zero-cash date.
- Growth Rate CalculatorCalculate total and per-period growth rate (CAGR-style) between two values.
- Growth Rate ModelerProject a starting value forward at a fixed growth rate per period with a table.
- Churn Rate CalculatorCalculate customer churn rate, retention rate, and net change for a period.
- Cohort Analysis ToolBuild a retention cohort table from your raw cohort sizes and retained counts.
- Customer Acquisition Cost (CAC) CalculatorCalculate CAC and optionally CAC payback period from spend, customers, ARPU, and margin.
- Customer Lifetime Value (LTV) CalculatorCompute LTV from ARPU, gross margin, and churn — with a discounted variant and LTV:CAC.
- Unit Economics CalculatorCalculate LTV, CAC, LTV:CAC ratio, payback months, and contribution margin in one view.
- Financial Ratio CalculatorCalculate liquidity, leverage, profitability, and efficiency ratios from your statements.
- Market Size EstimatorEstimate TAM, SAM, and SOM from audience, addressable %, and ARPU.
- Market Opportunity Sizing CalculatorSize a market opportunity top-down (industry %) or bottom-up (accounts × ACV).
- Startup Valuation CalculatorEstimate a startup valuation with the revenue multiple, Berkus, or Scorecard method.
- Cap Table GeneratorBuild a cap table by adding founders and modeling funding rounds and option pools.
- Dilution CalculatorSee how your ownership changes after a priced round with an optional new option pool.
- Equity Split CalculatorSuggest a fair founder equity split from weighted contributions on idea, work, capital, and risk.
- Google AdSense CalculatorEstimate AdSense revenue from monthly pageviews using Page RPM or CTR × CPC.
- Tax CalculatorEstimate income tax owed from your gross income and your own tax rate.
- Paycheck CalculatorEstimate your take-home paycheck from federal, state, FICA, and deductions.
- Payroll CalculatorCalculate gross pay, overtime, bonus, and employer payroll cost per period.
- Salary ConverterConvert salary between hourly, daily, weekly, monthly, and yearly amounts.
- Retirement CalculatorProject your retirement balance from current savings, contributions, and return.
- Insurance Need CalculatorEstimate the life insurance coverage you need using a DIME-style formula.
- Cash Flow ForecasterForecast monthly cash balance from inflow, outflow, and optional growth rate.
- Budget PlannerSplit monthly income into needs, wants, and savings buckets in dollars.
- Mortgage CalculatorCalculate monthly mortgage payment, total interest, and amortization schedule.
- Auto Loan CalculatorCalculate auto loan monthly payment, total interest, and total cost.
- Student Loan CalculatorCalculate student loan monthly payment, total interest, and grace-period accrual.
- Loan Comparison CalculatorCompare 2 or 3 loans side-by-side by monthly payment, interest, and total cost.
- EMI Loan CalculatorCalculate Equated Monthly Installment (EMI), total payable, and total interest.
- Debt Payoff CalculatorPlan a debt payoff with snowball or avalanche strategies and extra payments.
- Rent vs Buy CalculatorCompare renting and buying over 5-10 years with break-even and opportunity cost.
- Lease vs Buy CalculatorCompare leasing a car vs buying — total out-of-pocket and equity at lease-end.
- Rental Property CalculatorCalculate cash flow, cap rate, NOI, and cash-on-cash return for a rental.
- Condo HOA Fee CalculatorCalculate effective monthly HOA fee including special assessments and reserves.
- Household Expense TrackerTrack monthly household spend against a budget by category.
Math & Statistics
Browse all math & statistics→- Percentage CalculatorCalculate percentages, percentage change, and more.
- Average CalculatorCalculate mean, median, mode, range, and more statistics.
- Area CalculatorCalculate area of rectangles, circles, triangles, and more.
- Circle CalculatorGet radius, diameter, area, and circumference from any one value.
- Fraction CalculatorAdd, subtract, multiply, or divide fractions with step-by-step working.
- Perimeter CalculatorCalculate perimeter of rectangles, squares, triangles, and polygons.
- Volume CalculatorCalculate volume of cubes, cylinders, spheres, cones, and boxes.
- Speed Distance TimeSolve for speed, distance, or time using the SDT formula.
- Scientific Notation ConverterConvert between standard, scientific, engineering, and E-notation with adjustable precision.
- Percentage Change CalculatorCalculate the percentage increase or decrease between two values with the formula shown.
- Percentage Increase Decrease CalculatorApply a percentage increase or decrease to any value and see the new total instantly.
- Ratio CalculatorSimplify ratios or solve A:B = C:D for the missing value using cross-multiplication.
- Square Root CalculatorCompute the square root of any non-negative number and detect perfect squares.
- Cube Root CalculatorCompute the cube root of any real number, including negatives, with perfect-cube detection.
- Power CalculatorRaise any base to any exponent (positive, negative, or fractional) and see the formula.
- Exponent CalculatorCalculate b^n for any base and exponent, with the result also shown in scientific notation.
- Logarithm CalculatorCompute log base 10, natural log (ln), log base 2, or any custom base with change-of-base.
- Factorial CalculatorCompute n! exactly using BigInt for any 0 ≤ n ≤ 5000, with digit count and scientific approximation.
- Fibonacci CalculatorFind the n-th Fibonacci number exactly using BigInt for any 0 ≤ n ≤ 5000, with sequence preview.
- Modulo CalculatorCompute a mod n for any integers or decimals, with truncated and Euclidean remainders.
- GCD CalculatorFind the greatest common divisor of two or more integers using the Euclidean algorithm.
- LCM CalculatorFind the least common multiple of two or more integers using the GCD relationship.
- Prime Number CheckerCheck whether an integer is prime using trial division up to its square root.
- Quadratic Equation SolverSolve ax² + bx + c = 0 with discriminant, roots, vertex, and factored form.
- Pythagorean Theorem SolverSolve a² + b² = c² for any missing side of a right triangle, with worked steps.
- Triangle CalculatorSolve any triangle from SSS, SAS, ASA, AAS, or SSA inputs with sides, angles, area, and perimeter.
- Angle CalculatorConvert degrees, radians, and gradians, or find the angle between two 2D vectors.
- Slope CalculatorFind slope, y-intercept, line equation, angle of inclination, and distance from two points.
- Matrix CalculatorAdd, subtract, multiply, transpose, or take the determinant of matrices up to 6×6.
- Trigonometry CalculatorCompute sin, cos, tan, csc, sec, and cot for any angle in degrees or radians.
- Statistics CalculatorFull descriptive statistics — mean, median, SD, variance, quartiles, skew, kurtosis.
- Mean Median Mode CalculatorCompute mean, median, and mode from a list of numbers with the formulas shown.
- Standard Deviation CalculatorSample and population standard deviation with optional step-by-step work table.
- Variance CalculatorSample (n−1) and population (n) variance from a list of numbers.
- Permutation CalculatorPermutations P(n,r) with or without repetition, computed in BigInt for exact answers.
- Combination CalculatorCombinations C(n,r) and multiset combinations C(n+r−1, r), computed in BigInt.
- Z-Score CalculatorCompute z from a value plus mean and SD, or z-scores for every row of a data set.
- Confidence Interval CalculatorConfidence intervals for a mean (t or z) or a proportion, at 80% to 99.9% levels.
- Correlation CalculatorPearson r, R², covariance, and the t-test for significance, from (x,y) pairs.
- Chi-Square CalculatorGoodness-of-fit and independence chi-square tests with bundled critical values.
- T-Test CalculatorOne-sample, two-sample (Welch or pooled), and paired t-tests with critical values.
- Linear Regression CalculatorOLS slope, intercept, R², standard error, plus optional prediction at a chosen x.
- Sample Size CalculatorRequired sample size for a proportion with finite-population correction.
- Statistical Significance CheckerA/B test significance via the two-proportion z-test with p-value and lift.
- Unit ConverterConvert length, mass, area, volume, time, speed, energy, pressure, power, data, and temperature.
- Simplify Fractions CalculatorReduce a fraction to its lowest terms, showing the GCD and the mixed-number and decimal forms.
- Mixed Number CalculatorConvert mixed numbers to improper fractions and improper fractions to mixed numbers, simplified.
- Decimal to Fraction CalculatorConvert terminating and repeating decimals to exact fractions in lowest terms.
- Equivalent Fractions CalculatorGenerate a chain of equivalent fractions and check whether two fractions are equal.
- LCD and GCD CalculatorFind the least common denominator (LCM) and greatest common divisor of a set of whole numbers.
Date & Time
Browse all date & time→- Age CalculatorFind your exact age in years, months, and days.
- Unix Timestamp ConverterConvert Unix timestamps to dates and back, in any IANA time zone.
- Date Difference CalculatorCalculate years, months, days, hours, and weeks between any two dates.
- Time Zone ConverterConvert wall-clock times between any IANA time zones, with DST handled correctly.
- Business Days CalculatorCount business days between dates, or add business days to a start date.
- Week Number CalculatorFind the ISO 8601 and US/Canada week number for any date.
- Countdown TimerLive countdown to any future date and time, with days, hours, minutes, and seconds.
- Age in Days CalculatorCalculate your exact age in days, weeks, hours, minutes, and seconds.
- Days Until Date CalculatorCount the days from today to any future or past date.
- Days Between DatesCalculate the exact number of days between any two dates.
- Hours CalculatorCalculate hours and minutes between two times, with break deduction and overnight support.
- Minutes to Hours ConverterConvert minutes to hours and back, in decimal and Hh Mm formats.
- Seconds to Time ConverterConvert seconds to HH:MM:SS or days/hours/minutes/seconds, and back.
- Military Time ConverterConvert between 12-hour AM/PM, 24-hour, and 4-digit military time formats.
- Age on Date CalculatorCalculate how old someone will be (or was) on any specific date.
- Leap Year CalculatorCheck if any year is a leap year, with reason and the next leap year.
- Day of Week CalculatorFind the day of the week for any date using Zeller's congruence.
- Daylight Saving Time CalculatorFind DST spring-forward and fall-back transitions for any IANA time zone.
- Work Hours CalculatorAdd up multiple shifts with break deduction, overnight support, and optional pay rate.
- Year Progress CalculatorSee what percent of the year has elapsed, with day, week, and remaining days.
- Time Until EventLive countdown to any named future event with weeks, days, hours, minutes, seconds.
- Months Between DatesCount full months and remaining days between any two dates, with decimal months.
- Weeks Between DatesCount full weeks and extra days between any two dates, with decimal weeks.
- Years Between DatesCalculate years, months, and days between two dates, with decimal years.
- Retirement Date CalculatorFind your retirement date from date of birth and target retirement age.
- Jet Lag CalculatorEstimate hour shift, direction, and recovery days for a trip between two time zones.
- World ClockLive clocks for up to 12 IANA time zones, with offset and weekday.
- Online StopwatchBrowser stopwatch with start, pause, resume, lap, and reset at centisecond precision.
- Meditation TimerMeditation timer with optional interval bells, played silently if your browser blocks audio.
- Easter Date CalculatorFind Western and Orthodox Easter dates for any year using the Meeus algorithms.
- Islamic Calendar ConverterConvert between Gregorian and tabular Hijri dates using the Kuwaiti algorithm.
- Hebrew Calendar ConverterConvert between Gregorian and Hebrew dates using the standard arithmetic Hebrew calendar.
- Buddhist Calendar ConverterConvert Gregorian dates to Buddhist Era (Thai/Lao/Cambodian: BE = CE + 543) and back.
Developer Tools
Browse all developer tools→- JSON FormatterPretty-print, validate, and minify JSON with a clear error line and column.
- YAML to JSON ConverterConvert YAML to JSON or JSON to YAML in your browser with one click.
- Base64 Encoder/DecoderEncode or decode Base64 text safely with UTF-8 and an optional URL-safe variant.
- URL Encoder/DecoderPercent-encode or decode URLs with a clear choice between full URL and component scope.
- MD5 Hash GeneratorGenerate a 32-character MD5 hash from any text, fully client-side.
- SHA-256 Hash GeneratorGenerate a 64-character SHA-256 hash from any text using your browser's native crypto.
- Regex TesterTest JavaScript regular expressions with live match results, capture groups, and flags.
- JWT DecoderDecode a JSON Web Token to inspect its header, payload, and expiry — without sending it anywhere.
- UUID GeneratorGenerate cryptographically random UUID v4 or time-ordered UUID v7 in bulk, in your browser.
- Cron Expression ParserTranslate a cron expression to plain English and preview the next five run times.
- Slug GeneratorTurn any title into a clean, SEO-friendly URL slug with custom separator and length.
- HTTP Status Code LookupLook up any HTTP status code — meaning, category, RFC reference, and when to use it.
- htpasswd GeneratorGenerate a SHA-1 .htpasswd line in your browser — no server, no logs.
- XML FormatterPretty-print, validate, and minify XML with full attribute and CDATA preservation.
- HTML FormatterPretty-print or minify HTML with safe handling of script, style, and pre blocks.
- SQL FormatterFormat SQL queries with clause-level line breaks, indent control, and keyword case.
- Code FormatterRe-indent brace-based source (JS, TS, Java, C#, Go, Rust, PHP) using a token-aware rewriter.
- Syntax HighlighterToken-based code highlighting for JS, TS, Python, JSON, CSS, HTML, and SQL — no remote CDN.
- JavaScript MinifierStrip comments and collapse whitespace from JS with safe handling of strings, templates, and regex.
- CSS MinifierShrink CSS by removing comments, collapsing whitespace, and shortening hex colours.
- JSON to CSV ConverterFlatten a JSON array of objects into CSV with delimiter and header controls.
- CSV to JSON ConverterParse CSV (or TSV / pipe) into JSON with header detection and optional type inference.
- XML to JSON ConverterConvert XML to JSON with @-prefixed attributes and array grouping for repeated elements.
- YAML ValidatorSpot tab indent, unbalanced brackets, mixed sequences, and duplicate keys in your YAML.
- HTML to Markdown ConverterTranslate HTML to CommonMark-flavoured Markdown with headings, lists, links, and images.
- Markdown to HTML ConverterRender CommonMark Markdown to clean HTML with both source view and a live preview.
- HTML Entity Encoder/DecoderEncode or decode HTML entities — minimal, all non-ASCII, named, and numeric references.
- Text FormatterClean up messy text: trim lines, collapse spaces, normalize line endings, and remove blank lines.
- Case ConverterConvert text between UPPER, lower, Title, camelCase, snake_case, kebab-case, and more.
- Capitalize ConverterCapitalize the first letter of every word, sentence, or full AP/APA title.
- Reverse Text GeneratorReverse text by characters, words, sentences, or lines — plus an upside-down flip.
- Text RepeaterRepeat any text or phrase a chosen number of times with a custom separator.
- Binary Hex Decimal ConverterConvert between binary, octal, decimal, and hexadecimal with BigInt precision.
- Palindrome CheckerCheck whether a word or sentence reads the same forwards and backwards, with per-word scan.
- Diff CheckerSide-by-side line diff with add/remove highlighting and a copyable unified diff.
- Text Comparison ToolCompare two texts by character, word, and line counts plus Jaccard similarity.
- Morse Code TranslatorEncode text to ITU Morse code or decode Morse back into letters and digits.
- ASCII Art GeneratorRender short text as block-letter ASCII art with a built-in 5×5 bitmap font.
- Hash GeneratorSHA-1, SHA-256, SHA-384, and SHA-512 digests computed via the Web Crypto API.
- Bcrypt GeneratorHash plain text with bcrypt or verify a password against an existing bcrypt hash, entirely in your browser.
- JWT GeneratorSign HS256, HS384, or HS512 JSON Web Tokens with a secret using the Web Crypto API.
- Chmod CalculatorConvert between octal modes, ls -l symbolic form, and a ready-to-paste chmod command.
- MIME Type LookupLook up the canonical MIME type for an extension, or extensions for a MIME type.
- Regular Expression ExplainerPlain-English breakdown of any JavaScript regex, with optional sample-text matching.
- Git Command GeneratorBuild the right git invocation for everyday tasks — commit, push, rebase, stash, cherry-pick.
- Linux Command ExplainerBreak a Bash one-liner into commands, flags, args, pipes, and redirects with plain-English notes.
- Cron Job TesterShow the next N firing times of a 5-field cron expression in your local timezone.
- MySQL Query GeneratorBuild syntactically correct MySQL SELECT, INSERT, UPDATE, and DELETE statements from form fields.
- PostgreSQL Query GeneratorBuild PostgreSQL SELECT, INSERT, UPDATE, and DELETE queries with inline literals or numbered $1/$2 parameters.
- MongoDB Query BuilderBuild MongoDB shell commands — find, insertOne, updateMany, deleteMany — from JSON filter and document fields.
- Redis Command GeneratorBuild valid redis-cli commands — GET, SET, HSET, LPUSH, EXPIRE, ZADD and more — with safe quoting.
- GraphQL Query BuilderBuild a valid GraphQL document — query, mutation, or subscription — with arguments and nested selection sets.
- Elasticsearch Query BuilderBuild Elasticsearch DSL queries — match, term, range, and bool — and emit the full search request body.
- API Response FormatterPretty-print, minify, or sort the keys of a JSON API response, with byte counts and error location.
- API Documentation GeneratorGenerate clean Markdown docs for an HTTP endpoint from form fields — headers, params, request and response examples.
- CI/CD Pipeline GeneratorGenerate GitHub Actions, GitLab CI, or CircleCI YAML for Node, Python, Go, Rust, or Java projects.
- Schema Markup GeneratorGenerate valid JSON-LD for Organization, Person, Article, Product, FAQPage, BreadcrumbList, and WebSite.
- Title Tag GeneratorGenerate an SEO-friendly <title> tag with live character and pixel-width counters against the 580px SERP budget.
- Meta Description GeneratorGenerate a meta description tag with live character count and focus-keyword presence checking.
- Robots.txt GeneratorBuild a valid robots.txt with multiple user-agent groups, Allow/Disallow paths, Crawl-delay, Sitemap, and Host.
- XML Sitemap GeneratorGenerate a sitemaps.org XML sitemap from a list of URLs, with optional lastmod, changefreq, and priority overrides per URL.
- Gitignore GeneratorBuild a .gitignore from language and tool presets — Node, Python, Go, Terraform, VS Code, macOS, and more.
- Dockerfile LinterLint a Dockerfile in your browser for unpinned base images, missing apt cleanup, shell-form CMD, and more.
- Docker Compose GeneratorGenerate a valid docker-compose.yml from per-service inputs — image, ports, env, volumes, depends_on.
- Kubernetes YAML GeneratorGenerate Deployment, Service, ConfigMap, Secret, and Ingress manifests with the current stable apiVersion.
- Nginx Config GeneratorGenerate an Nginx server block for static sites or reverse proxy with SSL, HSTS, gzip, and security headers.
- Apache .htaccess GeneratorGenerate a .htaccess file with HTTPS redirect, www handling, gzip, caching, security headers, and custom 301s.
- Terraform Snippet GeneratorGenerate idiomatic Terraform HCL snippets for AWS, Azure, and GCP resources with current provider versions.
- Ansible Playbook GeneratorBuild an Ansible playbook task by task with FQCN modules — apt, service, copy, template, user, git, and more.
- AWS IAM Policy GeneratorBuild an AWS IAM policy JSON statement by statement, with action presets, ARN resources, and condition blocks.
- OAuth Token Request GeneratorBuild a ready-to-run cURL command and raw HTTP request for OAuth 2.0 token flows, plus PKCE authorize URLs.
- CORS Header GeneratorGenerate CORS configuration for Nginx, Apache, Express, Fastify, Flask, Go, or raw HTTP headers.
- .env File GeneratorBuild a valid .env file with shell-safe quoting and a matching .env.example with masked values to commit.
- .env File ValidatorValidate a .env file for duplicate keys, mismatched quotes, unquoted spaces, weak secrets, and bad export.
- CDN Configuration GeneratorGenerate cache and edge configuration for Cloudflare, AWS CloudFront, Fastly, or as portable HTTP headers.
Design & Color
Browse all design & color→- CSS Gradient GeneratorBuild linear or radial CSS gradients with a live preview and copyable CSS.
- Color Palette GeneratorGenerate a 5-color palette from a base color using classic color-harmony rules.
- Random Color GeneratorGenerate random colors with hex, RGB, and HSL values shown side-by-side.
- CSS Grid GeneratorInteractive CSS Grid playground with live preview and copyable CSS for columns, rows, gap, and areas.
- CSS Flexbox PlaygroundInteractive flexbox playground — set direction, justify, align, wrap, and gap with a live preview.
- CSS Border Radius GeneratorTune four corners independently with a live box preview and a copyable border-radius declaration.
- CSS Box Shadow GeneratorBuild multi-layer box-shadows with inset support, live preview, and a copyable CSS declaration.
- CSS Flexbox GeneratorCompose flex container and item rules with a live preview and a copyable CSS block.
- CSS Animation GeneratorPick a preset keyframe animation, tune duration, easing, and iteration, then copy ready-to-paste CSS.
- Text Shadow GeneratorLayer text-shadows with custom offset, blur, and color on live preview text — copyable CSS.
- Image Shadow GeneratorAdd box-shadow or filter: drop-shadow to images with live preview and a copyable CSS snippet.
- CSS Hover Effects GeneratorPick from ten preset hover transitions and copy the base + :hover CSS — preview by hovering the button.
- CSS Border Style GeneratorControl width, style, and color per side (or all four together) with a live box preview.
- CSS Button GeneratorStyle a button with background, padding, radius, border, shadow and hover state — copy the CSS.
- CSS Badge GeneratorBuild pill, rounded, or square badges with color, padding, and typography — copy the CSS.
- Icon GeneratorRender bundled stroke or filled SVG icons at any size and color — copy markup or download SVG/PNG.
- Icon ConverterConvert any image to multi-size PNG, ICO-compatible PNG, or WebP icons — all client-side.
- CSS Image Filter GeneratorBuild a CSS filter chain (brightness, contrast, hue, blur and more) with a live preview.
- SVG Path GeneratorClick a canvas to add points and produce a valid SVG path with straight, quadratic, or cubic segments.
- Contrast CheckerCheck WCAG contrast ratio between two colors and see if they pass AA and AAA for normal and large text.
- Color Blind SimulatorPreview any color as people with protanopia, deuteranopia, or tritanopia would perceive it, using Machado matrices.
- Pantone Color ConverterConvert a Pantone Solid Coated code to RGB and hex, or find the nearest Pantone to any hex color.
- CMYK to RGB ConverterConvert CMYK percentages to sRGB values and hex using the standard print-to-screen formula.
- RGB to HSL ConverterConvert an RGB color (0-255) to HSL hue, saturation, and lightness with the hex equivalent.
- Color Harmony GeneratorGenerate complementary, analogous, triadic, tetradic, split-complementary, and square palettes from a base color.
- Color Theory GeneratorApply classic color-theory schemes to a base color with a swatch palette and an explainer of when to use each rule.
- Color Compatibility CheckerCompare two colors for hue harmony and WCAG contrast to see whether they work together visually and accessibly.
- Color Name FinderFind the closest CSS named color (X11/W3C extended list) for any hex value, with three near-match alternates.
- Font GeneratorConvert plain text to Unicode styled variants - bold, italic, script, fraktur, monospace, fullwidth and more.
- Font Pairing ToolBrowse curated heading + body font pairings from the free Google Fonts library, grouped by use case.
- Design System GeneratorGenerate primary color, spacing, and type-scale tokens from a base color, base font size, and modular ratio.
- Spacing Scale GeneratorBuild a linear (4px/8px) or modular (1.25/1.333/1.5/1.618) spacing scale with px and rem CSS variables.
- Responsive Design Breakpoint TesterPreview your HTML/CSS (or a URL, if the site allows iframing) at eight common viewport widths from 320 to 1920 pixels.
- Card Design GeneratorDesign a UI card with live preview and copy the CSS class plus HTML markup.
Image Tools
Browse all image tools→- Image ResizerResize PNG, JPG, or WebP images in your browser with optional aspect-ratio lock.
- Image CompressorCompress JPG, PNG, or WebP images locally — see the before / after byte counts.
- Image CropperCrop an image to an exact pixel region using numeric X, Y, width, and height inputs.
- Image to Base64Convert any image to a Base64 data URL with one click — perfect for inline HTML and CSS.
- WebP to PNG ConverterConvert WebP images to lossless PNG in your browser — no uploads, transparency preserved.
- PNG to JPG ConverterConvert PNG images to JPG with a quality slider — runs entirely in your browser.
- PNG to WebP ConverterConvert PNG images to modern WebP with transparency preserved — fully in-browser.
- JPG to WebP ConverterConvert JPG photos to smaller WebP files with adjustable quality — no uploads.
- Favicon GeneratorGenerate a 6-size favicon set (16, 32, 48, 180, 192, 512) from a single source image.
- Image Color ExtractorExtract the dominant colors from any image as HEX and RGB swatches — runs locally.
- EXIF ViewerInspect JPEG EXIF metadata — camera, lens, exposure, ISO, date — fully in your browser.
- Image RotatorRotate an image by 90°, 180°, 270°, or any custom angle — entirely in your browser.
- Image FlipperMirror an image horizontally or vertically — runs locally in your browser.
- Transparent Background CheckerCheck whether an image has a transparent background — and how much of it is transparent.
Generators
Browse all generators→- Random Number GeneratorGenerate random numbers in any range, single or multiple.
- Password GeneratorGenerate strong, cryptographically secure random passwords in your browser.
- Lorem Ipsum GeneratorGenerate classic Lorem Ipsum filler text by words, sentences, or paragraphs.
- QR Code GeneratorGenerate scannable QR codes from any text or URL — all rendered in your browser.
- Barcode GeneratorGenerate Code 128, EAN-13, UPC-A, or Code 39 barcodes in your browser.
- Random Name GeneratorGenerate random first + last name combinations for testing, characters, and seed data.
- Username GeneratorGenerate unique usernames in adjective+noun, gamertag, or brandable styles.
- Random String GeneratorGenerate cryptographically random strings with full control over alphabet and length.
- Random Quote GeneratorSurface a random public-domain quote with one click — perfect for placeholders or daily prompts.
- Dummy Text GeneratorGenerate themed dummy text (Lorem, English, hipster, corporate) for mockups and design layouts.
- Random Sentence GeneratorGenerate grammatically structured random English sentences for writing prompts and tests.
- Random Paragraph GeneratorGenerate random English paragraphs with configurable length and tone for filler content.
- Dice RollerRoll d4, d6, d8, d10, d12, d20, or d100 with up to 50 dice and a running total.
- Coin FlipFlip a fair virtual coin one time or up to 1000 times with a heads/tails tally.
- Lucky Number GeneratorGenerate lucky numbers from a custom range with optional unique and bonus-number modes.
- Nickname GeneratorBuild gamer-style nicknames from your seed name plus curated adjectives and creatures.
- Random Team GeneratorSplit a list of people into balanced random teams by team count or members-per-team.
- Wheel of Names SpinnerSpin an animated wheel that picks a winner from your list with a fair, crypto-secure draw.
- Giveaway RandomizerPick winners and alternates from a list of entries with optional duplicate removal.
- Secret Santa RandomizerPair up gift-givers in a valid derangement with optional same-household blocking.
- Emoji MixerMix random emojis from themed buckets or replace each letter in your text with an emoji.
- Emoticon GeneratorPick from classic ASCII kaomoji and Western smileys grouped by mood.
- Anagram GeneratorList every unique anagram of a word or short phrase using pure permutation.
Lifestyle & Productivity
Browse all lifestyle & productivity→- Clothing Size ConverterConvert clothing sizes across US, UK, EU, Italy, France, and Japan for men and women.
- Shoe Size ConverterConvert shoe sizes across US, UK, EU, JP for men, women, and kids using ISO 19407.
- Ring Size CalculatorFind US, UK, EU, and Japanese ring sizes from inner diameter or circumference.
- Habit TrackerTrack daily habits with a weekly grid and current streak count.
- Grocery List GeneratorBuild a checkable grocery list grouped by store aisle.
- Packing List GeneratorGenerate a packing list from trip type, climate, days, and travelers.
- Travel Checklist GeneratorPre-trip phased to-do list from 4 weeks out to return day.
- Cleaning Schedule GeneratorDaily, weekly, and monthly cleaning tasks split across rooms.
- Declutter Checklist GeneratorRoom-by-room declutter checklist with keep, donate, and trash decisions.
- Chore Distribution PlannerSplit household chores between people fairly using minute weights.
- Home Inventory PlannerList belongings by room with value totals for insurance and moves.
- Wardrobe PlannerCatalogue clothes with category, color, cost, and cost-per-wear.
- Capsule Wardrobe CreatorPlan a 33-piece capsule wardrobe with editable slot targets.
- Outfit GeneratorMix random outfits from your saved tops, bottoms, dresses, and shoes.
- Food Expiration TrackerTrack food expiry dates and surface what to use soon.
- Workout Routine GeneratorGenerate a weekly workout split with exercises, sets, and reps from bundled templates.
- HIIT Workout GeneratorGenerate a round-by-round HIIT workout with adjustable work/rest intervals.
- Stretching Routine GeneratorBuild a static or dynamic stretching routine for a chosen focus area and duration.
- Pilates Routine GeneratorBuild a mat Pilates routine with warm-up, main set, and cool-down moves.
- Swimming Workout GeneratorGenerate a pool swim with warm-up, main set, drills, and cool-down by total distance.
- Circuit Training CreatorBuild a multi-round circuit with stations, work/rest intervals, and equipment options.
- Cross-Training PlanBuild a 7-day cross-training week around your primary sport with complementary sessions.
- Marathon Training PlanGenerate a week-by-week marathon plan with easy, tempo, and long-run mileage.
- Goal Setting AssistantTurn a one-line goal into a SMART breakdown with measurable milestones.
- New Year Resolution PlannerTurn a resolution into a 12-month plan with monthly themes and action checkpoints.
- Bucket List CreatorBuild a categorized bucket list from bundled idea packs plus your own custom items.
- Kanban Board GeneratorBuild a kanban board with editable columns and cards, then export as Markdown or JSON.
- SWOT Analysis GeneratorBuild a colour-coded Strengths, Weaknesses, Opportunities, Threats analysis with Markdown export.
- OKR PlannerPlan objectives with 3-5 key results each, score progress, and export as Markdown.
- Topic Mind Map GeneratorBuild a hierarchical mind map and export as indented Markdown bullets or an ASCII tree.
- Concept MapperMap concepts and labelled relationships between them; export as bullet list or Mermaid graph.
- Tournament Bracket GeneratorGenerate a single-elimination bracket from a participant list with automatic byes.
- Seating Chart GeneratorPlan tables and seats for any event with running fill counts and Markdown export.
- Table Setting GuideCasual, formal, and buffet table setting guides with placement reference and printable checklist.
- Vision Board CreatorBuild a six-category vision board (career, health, relationships, finance, travel, growth) and export as Markdown.
- Meal PlannerPlan a week of meals and auto-generate a grocery list.
- Wedding PlannerPhased wedding checklist + budget tracker driven by your wedding date.
- Party PlannerCalculate party shopping quantities for any guest count and duration.
- Potluck OrganizerAssign dishes to guests and check whether the menu is balanced.
- Guest List ManagerTrack RSVPs, plus-ones, dietary needs, and table assignments.
- Project Timeline PlannerCompute phase start/end dates from durations and dependencies.
- Event Timeline PlannerBuild a clock-time run-of-show from segment durations.
- Team Meeting SchedulerFind the time slot where the most teammates are available.
- Employee SchedulerWeekly shift grid with hour totals and overnight handling.
- Holiday Gift TrackerTrack holiday gifts per recipient with budget and status.
- Fundraiser Goal TrackerTrack campaign progress and project the goal completion date.
- Birthday Reminder ToolSee who has a birthday soon and what age they will turn.
Home & Construction
Browse all home & construction→- Paint CalculatorEstimate paint cans needed for any room from wall dimensions, openings, coats, and coverage.
- Tile CalculatorCalculate how many floor or wall tiles you need with grout gap and waste percentage.
- Flooring CalculatorEstimate boxes of laminate, vinyl, or hardwood flooring from room size and box coverage.
- Concrete CalculatorCalculate concrete volume in yards or cubic metres and the 40/60/80 lb bag count for slabs, footings, columns, and cylinders.
- Gravel CalculatorCalculate gravel volume, tonnage, and 50-lb bag count from area and depth with material density.
- Mulch CalculatorCalculate cubic yards and bag count of mulch needed for any garden bed at any depth.
- Lumber CalculatorCompute board feet, linear feet, and actual dimensions for any nominal lumber size and length.
- Drywall CalculatorEstimate drywall sheets, screws, joint tape, and compound from wall area and sheet size.
- Insulation CalculatorCalculate insulation thickness needed to hit a target R-value for any material and wall area.
- Deck CalculatorEstimate deck boards, joists, and fasteners from deck dimensions and joist spacing.
- Fence CalculatorCalculate fence posts, rails, pickets, and concrete bags from fence length and post spacing.
- Staircase CalculatorCalculate riser height, tread depth, total run, and stringer length from total rise.
- Door & Window Framing CalculatorCalculate header size, king and jack studs, and cripples for any door or window rough opening.
- Roofing Material CalculatorCalculate roof squares, shingle bundles, underlayment rolls, and nails from footprint and pitch.
- Pizza Size CalculatorCompare pizza sizes by area, price-per-square-inch, and find the best value.
- Coffee CalculatorFind the right coffee-to-water ratio for filter, French press, or espresso.
- Portion Size CalculatorScale standard food portions to any number of servings in grams and ounces.
- Cake Frosting CalculatorCalculate cups of frosting needed for round, square, sheet cakes, or cupcakes.
- Cooking Unit ConverterConvert volumes and weights between US, metric, and imperial cooking units.
- Cooking Temperature ConverterConvert °F, °C, and UK gas marks for any oven recipe.
- Foundation CalculatorEstimate concrete volume, bags, and rebar for slab, footing, or pier foundations.
- HVAC Size CalculatorSize heating and cooling equipment in BTU/h, kW, and tons by area and climate zone.
- Electrical Load CalculatorEstimate total household electrical load and recommended service amps using NEC 220.
- Landscaping Cost CalculatorBudget sod, mulch, gravel, pavers, and extras with editable per-area prices and labor.
- Wallpaper CalculatorCalculate how many wallpaper rolls you need based on room size and pattern repeat.
- Home Renovation BudgetPlan a renovation budget by room, quality tier, contractor markup, and contingency.
- Moving Cost CalculatorEstimate moving costs for local hourly and long-distance per-lb moves with packing and insurance.
- Decoration Budget PlannerSplit a decor budget across furniture, lighting, rugs, and accessories with custom percentages.
- Solar Panel CalculatorSize a rooftop solar system in kW, panels, and roof area from your bill or usage.
- Renewable Energy CalculatorConvert installed capacity to annual kWh, homes powered, and avoided CO₂ for any renewable source.
- Carbon Footprint CalculatorEstimate annual CO₂e from electricity, gas, driving, flights, food, and waste using EPA factors.
- Water Conservation CalculatorModel water and bill savings from EPA WaterSense fixture upgrades across a household.
- Water Usage CalculatorEstimate household daily, monthly, and yearly water use by activity with bill projection.
- Energy Efficiency CheckerScore your home on insulation, windows, HVAC, water heater, and renewables with a directional report card.
Education & Writing
Browse all education & writing→- GPA CalculatorCalculate your GPA from courses, grades, and credit hours.
- Grade CalculatorCalculate your final grade from assignment scores and weights.
- Test Score CalculatorCalculate your test percentage and letter grade.
- Character CounterCount characters, words, sentences, lines, and UTF-8 bytes of any text as you type.
- Word CounterCount words, characters, sentences, paragraphs, plus reading and speaking time.
- Word Frequency CounterList every word in your text by frequency, with stop-word filtering and CSV export.
- Sentence CounterCount sentences with abbreviation-aware splitting and per-sentence word length stats.
- Syllable CounterCount syllables in a word, sentence, or article with Flesch and Flesch–Kincaid scores.
- Reading Time EstimatorEstimate reading and speaking time at child, average, fast, or custom words-per-minute.
- Keyword Density CheckerCheck keyword density for unigrams, bigrams, and trigrams with a focus-keyword tracker.
- pH CalculatorCompute pH, pOH, [H+], and [OH-] for any aqueous solution.
- Molarity CalculatorSolve for molarity, mass of solute, or volume of solution from any two inputs.
- Density CalculatorSolve for density, mass, or volume — ρ = m/V — across SI and imperial units.
- Half-Life CalculatorCalculate remaining amount, half-life, elapsed time, or initial amount in radioactive decay.
- Atomic Mass CalculatorCalculate molar mass from any chemical formula with element-by-element breakdown.
- Stoichiometry CalculatorConvert mass or moles between reactants and products using the mole ratio.
- Math Problem GeneratorGenerate arithmetic worksheets with addition, subtraction, multiplication, and division at three difficulties.
- Citation GeneratorFormat a single source in APA, MLA, Chicago, or Harvard style from a structured form.
- Bibliography GeneratorBuild a sorted bibliography from multiple sources in your chosen citation style.
- APA Citation ToolGenerate APA 7th edition citations for books, journal articles, websites, and newspaper articles.
- MLA Citation ToolGenerate MLA 9th edition citations for books, journal articles, websites, and newspaper articles.
- Chicago Citation ToolGenerate Chicago Manual of Style 17th edition author-date citations for common source types.
- Harvard Citation ToolGenerate UK Harvard (Cite Them Right 11th edition) citations for common source types.
- Class Schedule OptimizerFind conflict-free combinations of class sections.
- Degree PlannerPlan courses by semester with credit totals and prereq checks.
- Learning Path PlannerConvert skills and hours into real per-skill finish dates.
Pet Care
Browse all pet care→- Dog Age CalculatorConvert your dog's age to human years based on breed size.
- Cat Age CalculatorConvert your cat's age to human years and find their life stage.
- Pet Food CalculatorCalculate how much to feed your dog or cat based on weight and activity.
- Pet Weight CalculatorCheck if your dog or cat is a healthy weight and find their ideal range.
- Pet Name GeneratorGenerate dog, cat, and small pet names from curated common-name lists.
- Pet Vaccine SchedulerTrack dog and cat vaccines; see next-due dates from given dose dates.
Form Builders
Browse all form builders→- HTML Form BuilderVisually configure form fields and generate clean HTML form markup you can paste anywhere.
- HTML Table GeneratorGenerate semantic HTML <table> markup from rows, columns, and headers with optional CSS class.
- Markdown Table GeneratorBuild GitHub-flavored markdown tables with alignment, padded for readable source.
- JSON to Table ConverterConvert a JSON array of objects into a semantic HTML table with auto-detected columns.
- JSON to HTML ConverterRender arbitrary JSON as nested <ul>/<li> or definition-list <dl> HTML for display anywhere.
- CSV to HTML ConverterConvert CSV data into a semantic HTML <table> with optional <thead> and CSS class.
- Pivot Table GeneratorCross-tabulate a CSV by row, column, and value with sum, avg, count, min, or max.
Games
Browse all games→- Typing Speed TestMeasure your typing speed in WPM and accuracy over a 30 or 60 second sample.
- Reaction Time TestClick when the screen turns green and measure your reaction time in milliseconds.
- Memory Match GameClassic card-match memory game with three grid sizes; tracks moves and time.
- 2048Slide and merge numbered tiles to reach the 2048 tile; keyboard arrows and touch swipes.
- Snake GameClassic snake on a 20x20 grid with arrow keys, WASD, on-screen buttons, and touch swipes.
- MinesweeperClassic minesweeper with small, medium, and large boards and first-click-safe mine placement.
- Simon SaysRepeat the colour sequence as it grows each round; tracks your best round in the session.
- Color Blindness TestIshihara-style colour vision screener with multiple-choice plates and a plain-English summary.
- Tic-Tac-ToePlay tic-tac-toe against a minimax CPU with easy, medium, and unbeatable difficulty.
- Rock Paper ScissorsPlay rock-paper-scissors against a random or pattern-detecting CPU, with running score.
- Yes or No DeciderRandom yes/no answer for any question, with a bundled prompt pack and session history.
- This or ThatPick between two options across 40 bundled pairs and export your picks at the end.
- Would You RatherAnswer 40 bundled would-you-rather dilemmas and export your full answer list.
- Pick a ColorMatch colour names to swatches or pick a random colour from a 36-entry bundled palette.
- Flappy Bird CloneBrowser flappy-bird clone with canvas, rAF physics, and tap or Space to flap.
- Sudoku SolverSolve any valid 9x9 sudoku grid with a backtracking solver and MCV heuristic.
- Word SearchFind hidden words on a 12x12 grid across five bundled themes, with mouse and touch drag.
- Crossword GeneratorGenerate a small themed crossword from a bundled clue pack with across/down clues.