Free online tools for everyone.

Instantly format and validate any JSON string. Paste raw or minified JSON and get a beautifully indented, readable output. Errors are detected and displayed clearly.

Strip all whitespace from JSON to create compact, minified output. Ideal for reducing payload size in APIs, configuration files, and production builds.

Convert text or data to and from Base64 encoding instantly. Automatically detects whether to encode or decode based on your input.

Safely encode URLs for HTTP requests or decode percent-encoded strings back to readable text. Handles all special characters per RFC 3986.

Paste any JWT token and instantly decode its header and payload sections. Inspect claims, expiry times, and issuer information without needing the secret key.

Convert Unix epoch timestamps to readable dates or convert any date/time to a Unix timestamp. Supports seconds and milliseconds, with UTC and local time display.

Generate universally unique identifiers (UUIDs) instantly. Choose between UUID v1 (time-based) and UUID v4 (random). Generate up to 20 UUIDs at once and validate existing ones.

Generate cryptographic hashes from any text input. Supports MD5, SHA-1, SHA-256, and SHA-512 algorithms. All processing happens server-side using native Node.js crypto.

Paste any CSV data and convert it to a JSON array instantly. The first row is used as object keys. Supports comma, semicolon, and tab delimiters.

Convert a JSON array of objects to a CSV file instantly. All keys become column headers. Supports flat and shallow-nested JSON structures.

Parse any XML document and convert it to a structured JSON object instantly. Handles attributes, nested elements, arrays, and namespaces.

Convert any JSON object or array to a well-formed XML document instantly. Handles nested objects, arrays, and primitive values.

Encode special HTML characters to their entity equivalents (& → &) or decode HTML entities back to plain text. Essential for safe HTML templating and debugging.

Convert any colour between HEX, RGB, HSL, and CMYK formats instantly. Enter a hex code, pick from the colour wheel, or type RGB values to get all formats at once.

Paste two blocks of text or code and instantly see every addition, deletion, and unchanged line highlighted. Great for comparing config files, code reviews, or document revisions.

Instantly view your connection and device information including IP address, device type, operating system, browser, language, and timezone. Perfect for testing and diagnostics.

Convert binary (base-2) numbers to decimal (base-10) format. Also see hexadecimal and octal equivalents.

Convert decimal (base-10) numbers to binary (base-2) format. Also see hexadecimal and octal equivalents.

Convert hexadecimal (base-16) numbers to decimal (base-10) format. Also see binary and octal equivalents.

Instantly format and beautify SQL queries. Supports MySQL, PostgreSQL, SQLite, T-SQL, BigQuery, MariaDB, and standard SQL. Choose indentation, keyword case, and dialect.

Minify CSS to reduce file size and improve page load speed, or beautify compressed CSS for readability. Supports Level 1 and Level 2 optimization using clean-css.

Convert Markdown text to clean HTML instantly. Supports GitHub Flavored Markdown (GFM) including tables, code blocks, strikethrough, and task lists. Preview and copy rendered HTML.

Create QR codes instantly for any URL, text, phone number, or message. Choose your preferred size and error correction level, then download the PNG. No sign-up required.

Format and validate YAML instantly. Detect syntax errors, convert YAML to JSON or JSON to YAML, and beautify configuration files for Kubernetes, Docker Compose, GitHub Actions, and more.

Minify and compress JavaScript code using Terser, the industry-standard JS minifier. Remove whitespace, shorten variable names, and compress code to reduce bundle size and improve page load speed.

Verify your SMTP mail server configuration in seconds. Enter your server host, port, and credentials to confirm the connection, TLS, and authentication all work, with an optional test email sent to your own address.

Enter a 5-field cron expression to get a plain-English explanation and per-field breakdown.

Paste your HTML to remove comments, collapse whitespace, and shrink page size. See exact byte savings.

Paste your GraphQL query or mutation to get a cleanly formatted, indented output.

Enter a regex pattern and optional test string to see matches and a token-by-token explanation of what your regex does.

Upload a PDF and we'll optimise its internal structure and strip hidden metadata to reduce the file size, processed instantly, never stored permanently.

Upload a ZIP archive and instantly extract all its files, everything runs in your browser so your data never leaves your device.

Instantly see your public IP address along with approximate geolocation details, country, region, city, and timezone. No signup required and nothing is stored.

Write HTML, CSS, and JavaScript side by side and see the result render instantly in a live preview. A built-in console captures console.log output and runtime errors, so you can prototype a layout, test a snippet, or debug a function without leaving your browser. Everything runs locally in a sandboxed frame, your code is never uploaded.

Calculate any percentage instantly. Find what is X% of Y, calculate percentage increase or decrease, or determine what percentage one number is of another.

Calculate the final price after discount and see how much you save. Enter the original price and discount percentage to instantly see your savings.

Calculate tips and split bills effortlessly. Enter your bill amount, choose a tip percentage, and see the total with tip plus how much each person should pay.

Calculate your Body Mass Index (BMI) to assess if you're at a healthy weight. Enter your height and weight in metric or imperial units to see your BMI and category.

Calculate your loan payments and see how much interest you'll pay over the life of the loan. Enter loan amount, interest rate, and term to get instant results with an amortization breakdown.

Calculate your monthly mortgage payment including principal, interest, property taxes, and insurance (PITI). See how different rates and terms affect your payment.

Calculate the future value of your investment or savings with compound interest. Enter principal, interest rate, time, and compounding frequency to see your money grow.

Calculate profit margins, markup percentages, and revenue instantly. Enter cost and selling price to see detailed profit calculations for your business.

Calculate the probability of an event, odds in favor, odds against, and complement probability. Enter favorable and total outcomes to get instant results.

Calculate tax amount and final total from any subtotal and tax rate. Useful for checkout estimates and invoices.

Quickly add VAT to net amounts or extract VAT from gross prices with accurate calculations.

Calculate commission earnings from sales and combine with base pay to estimate total compensation.

Estimate months and years needed to reach your savings target with regular contributions and optional investment growth.

Project your retirement balance from current age to retirement age using monthly savings and expected annual return.

Calculate the return on investment (ROI) for any investment. Enter your initial cost, final value, and optional time period to see your net profit, ROI percentage, and annualized return.

Find out your net worth by listing your assets and liabilities. Your net worth equals total assets minus total liabilities, a key indicator of your financial health.

Calculate your debt-to-income ratio to determine your loan eligibility. Lenders use DTI to evaluate mortgage and loan applications, a DTI under 43% is required for most loans.

Estimate your US federal income tax, Social Security, Medicare, and net take-home pay. Supports single and married filing status, pre-tax deductions, and state income tax.

Analyze a rental property investment in seconds. Enter purchase price, financing, and rental income to see monthly cash flow, cap rate, cash-on-cash return, and total ROI.

Calculate asset depreciation using straight-line, double declining balance (DDB), or sum-of-years-digits (SYD) methods. Get a full annual depreciation schedule instantly.

Calculate the profit or loss on any stock trade. Enter buy price, sell price, and number of shares to see net profit, ROI, and estimated after-tax returns including brokerage fees.

Find out exactly when you'll be debt-free and how much interest you'll pay. Enter your balance, APR, and monthly payment to see your payoff date and total cost, plus how much you save by paying more than the minimum.

Make the biggest financial decision of your life with confidence. This calculator compares the total net cost of buying vs renting over your planned stay, accounting for mortgage, equity, appreciation, property taxes, and the opportunity cost of your down payment.

Calculate your exact monthly car payment and the true cost of your auto loan. Factor in down payment, trade-in value, sales tax, interest rate, and loan term to see total interest and full amortization.

Calculate how many calories you need per day based on your height, weight, age, gender, and activity level. Get your BMR and TDEE, plus calorie targets for weight loss, maintenance, and muscle gain.

Estimate your body fat percentage using the accurate US Navy circumference method. Enter your neck, waist, and hip measurements to calculate body fat %, fat mass, lean mass, and your fitness category.

Find out what any dollar amount from history is worth in today's money, or vice versa. Uses US Bureau of Labor Statistics CPI data from 1913 through 2024.

Coast FIRE is the investment balance at which compound growth alone will fund your retirement, no more contributions needed. Enter your details to find your Coast FIRE number and see the Barista FIRE variant if you plan to work part-time.

Enter your current weight, goal weight, height, age, and activity level to get a personalised week-by-week weight loss timeline. Set a target date or weekly loss goal, and save your plan locally.

Enter your last menstrual period (LMP) or conception date to generate a full week-by-week pregnancy timeline. Track milestones, see your trimester progress, and save your timeline locally for easy revisits.

Find out exactly how much any appliance costs to run. Select an appliance, enter your usage hours and electricity rate, and get instant daily, monthly, and total cost breakdowns.

Two tools in one: calculate your exact inverter size, battery backup time, and solar panel requirements, then compare the monthly running cost of a generator against going solar.

Plug in your monthly pageviews and RPM to estimate ad revenue, then add your ad spend and cost per visitor to see net profit, break-even RPM, and the traffic you need to profit. Instantly reveals whether buying traffic pays off against ad-network payouts.

Find out exactly how much life insurance coverage you need using the DIME method. Enter your income, debts, mortgage, and education costs to get a recommended coverage amount.

Calculate your monthly student loan payment, total interest cost, and payoff timeline. See how making extra payments reduces interest and shortens your repayment period.

Estimate your US take-home pay after federal income tax, Social Security, Medicare, and state taxes. See your effective tax rate and net paycheck for any pay period.

Project your Roth IRA balance at retirement based on your contributions, current balance, and expected return. Includes 2024 income eligibility and contribution limit checks.

Find out how much equity you have in your home and how much you may be able to borrow. Calculates your LTV ratio and maximum HELOC or home equity loan amount.

Determine if refinancing your mortgage is worth it. Calculate your new monthly payment, monthly savings, break-even point, and total lifetime interest savings.

Enter up to 3 debts and see exactly when you'll be debt-free using the Debt Avalanche (highest-rate first) or Debt Snowball (lowest-balance first) strategy. See total interest saved and payoff order.

Calculate your monthly payment, total interest paid, and total loan cost for any personal loan. Adjust the loan amount, rate, and term to find the best fit for your budget.

Find out the maximum home price you can afford based on your annual income, monthly debts, and down payment. Uses front-end and back-end DTI limits to estimate your budget.

See exactly how much federal income tax you owe in 2024, broken down by each bracket. Calculates your marginal rate, effective rate, and after-tax income using 2024 standard deductions.

Calculate your FIRE number, the savings target for financial independence, plus how many years until you can retire early based on your savings rate, expenses, and expected investment return.

Estimate your Social Security monthly benefit at any claiming age from 62 to 70. Enter your FRA benefit from your SSA statement to see how early or delayed claiming affects your lifetime payout.

Calculate how much interest you'll earn on a Certificate of Deposit (CD). Enter your deposit amount, interest rate, and term to see your maturity value and APY.

Enter your gross salary and applicable deduction rates to instantly calculate your net take-home pay.

Enter your current salary and raise percentage to see your new pay, the increase amount, and a multi-year projection.

Project your pension pot at retirement by entering your salary, employee and employer contribution rates, and expected growth.

Calculate how a COLA raise affects your nominal salary and real purchasing power compared to inflation.

Create a professional invoice by filling in your details, line items, tax, and discount. Preview and print or download instantly.

Find the exact number of units you need to sell (and the revenue required) to cover all costs and start making a profit. Enter your fixed costs, selling price per unit, and variable cost per unit.

Count words, characters, sentences, and paragraphs in your text. Get detailed statistics including reading time and keyword density.

Convert text between different cases instantly. Supports uppercase, lowercase, title case, sentence case, and more.

Generate random text for testing, design mockups, and placeholder content. Customizable length and format.

Generate Lorem Ipsum placeholder text for your design projects. Choose paragraphs, words, or sentences.

Analyze keyword density and frequency in your text. Perfect for SEO content optimization and analysis.

Convert text to URL-friendly slugs. Remove special characters, convert spaces to hyphens for SEO-optimized URLs.

Remove line breaks and newlines from text. Convert multi-line text to a single continuous line.

Generate random strings with customizable length and character types (letters, numbers, symbols).

Generate strong, secure passwords with customizable length and character types. Ensure your accounts stay safe.

Check your password strength and get security recommendations. Test password entropy and vulnerability.

Type in any set of letters and find every word you can make from them. Perfect for Scrabble, Words With Friends, crosswords, and word puzzles.

Paste any text to instantly get Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, scannability checks, and actionable suggestions to make your writing clearer and more engaging.

Can't decide? Add your options below, one per line, and hit Pick to watch a slot machine choose for you at random.

Calculate your estimated due date based on your last menstrual period (LMP) using Naegele's rule. Get trimester start dates, your current week of pregnancy, and days until your due date.

Calculate your ideal daily macronutrient targets, protein, fat, and carbohydrates, based on your weight, height, age, activity level, and whether you want to cut, maintain, or bulk.

Calculate your ideal body weight using four widely-used medical formulas, Devine, Hamwi, Robinson, and Miller. Results are given in both kg and lbs for your height and gender.

Calculate your estimated ovulation date and 6-day fertile window based on your last period and cycle length. Includes predictions for the next 3 cycles.

Find the best times to wake up or go to bed based on natural 90-minute sleep cycles. Waking at the end of a cycle helps you feel refreshed instead of groggy.

Estimate your one-rep maximum (1RM) by entering a weight you can lift for multiple reps. Uses 6 formulas (Epley, Brzycki, Lombardi, Mayhew, O'Connor, Wathan) plus a training percentage table.

Calculate your Total Daily Energy Expenditure using the Mifflin-St Jeor formula with goals and macro estimates.

Find out how much water you should drink per day based on your body weight, activity level, and local climate.

Enter a date of birth to see the recommended vaccination schedule with upcoming, due, and overdue statuses.

Estimate your hereditary allergy risk and discover cross-reactive foods for common allergens. For educational use only.

Enter your date of birth to instantly find your exact age in years, months, and days, plus total days lived, weeks, hours, days until your next birthday, and the day of the week you were born.

Distribute your daily calorie and macro targets across 2–8 meals using preset profiles like equal, front-loaded, intermittent fasting, or athlete-style timing. See exact calories, protein, carbs, and fat per meal instantly.

Calculate your net profit or loss on any crypto trade. Enter your buy price, sell price, quantity, fees, and optional tax rate to see your total return, ROI percentage, and after-tax profit.

Convert any amount of Bitcoin, Ethereum, Solana, or 14 other top cryptocurrencies to USD, EUR, GBP, JPY, and more, using live prices updated every 5 minutes from CoinGecko.

Simulate investing a fixed amount at regular intervals from a starting price to a current price. See your total invested, coins accumulated, average cost basis, current value, and overall ROI.

Estimate your staking rewards by entering your staked amount, APR, and duration. Choose simple or compound staking to see daily rewards, monthly income, total rewards, and equivalent APY.

Enter your crypto holdings manually, up to 10 coins, with their current prices to calculate your total portfolio value, per-coin allocation percentage, and individual position values.

Calculate the percentage change between two crypto prices. Enter an old price and a new price to see the % gain or loss, absolute change, and multiplier. Optionally enter an investment amount to see how it changed in dollar terms.

Check real-time prices for Bitcoin, Ethereum, Solana, and 12 other top cryptocurrencies in USD, EUR, GBP, and 16 more currencies. Includes 24-hour price change and market cap. Data is cached every 5 minutes.

See the top cryptocurrencies ranked by market capitalisation. View live prices, 24-hour price changes, trading volume, and price highs/lows for the leading coins. Data sourced from CoinGecko and cached every 5 minutes.

Check whether a crypto wallet address matches the correct format for Bitcoin (Legacy, SegWit, Taproot), Ethereum/EVM, Solana, XRP, Cardano, Litecoin, Dogecoin, or Polkadot. Validation is structure-only, no blockchain calls are made.

See how much your investment would be worth today if you had bought Bitcoin or Ethereum in any year from 2010 to 2024. Uses approximate yearly average prices for educational purposes.

Calculate your return on investment for any crypto position. Enter your initial investment, final value, and any fees or costs to see your net profit, ROI percentage, and investment multiple (e.g. 3x, 10x).

Convert temperatures between Celsius, Fahrenheit, Kelvin, Rankine, and Reaumur with all conversions shown at once.

Convert speed between mph, km/h, m/s, knots, ft/s, and Mach number with instant results.

Convert pressure between PSI, bar, Pascal, kPa, MPa, atm, Torr, and inHg instantly.

Convert volume between litres, millilitres, US/UK gallons, cups, pints, quarts, and cubic units.

Convert CSS font sizes between px, rem, em, pt, vw, and percentage. Set your root/base font size for accurate em/rem conversions.

Convert fuel economy between L/100km, km/L, US mpg, UK mpg, and km/gallon with all values shown at once.

Upload any image (JPG, PNG, WebP, GIF, BMP) and instantly convert it to a PDF file. Choose from standard page sizes (A4, Letter) or fit to image dimensions. No signup required, your file is processed locally and deleted after 1 hour.

Upload multiple PDF files (up to 10) and merge them into a single PDF in your chosen order. Supports up to 40MB total upload size. No signup or watermarks, your files are deleted after 1 hour.

Convert files between formats instantly. Support for Excel to CSV/JSON, HTML to PDF, image format conversion (PNG, JPEG, WebP, AVIF, TIFF), and DOCX to PDF. No signup required, your files are deleted after 1 hour.

A playable piano right in your browser. Pick a scale, chord, or exercise and the keys light up, play along with your mouse, your touchscreen, or your computer keyboard.

Guess the hidden five-letter word in six tries. Each guess tells you which letters are right and whether they are in the right place. A fresh puzzle every day.

Seven letters, ninety seconds. Build as many words as you can - longer words score far more. Every rack is guaranteed to contain at least one long word.

The letters are jumbled - put them back in order before the clock runs out. Three difficulty levels, a running streak counter, and a hint when you get stuck.

Sixty seconds on the clock. Type each word as it appears and see your words-per-minute and accuracy update live as you go.

Sharpen your arithmetic with timed drills. Pick the operations and difficulty you want to work on, then answer as many as you can before the clock runs out.

Find the rule, then predict what comes next. Every sequence is built from a known pattern family, so there is always exactly one defensible answer.

Sixty seconds, as many correct answers as you can manage. Consecutive correct answers build a streak multiplier - and a wrong answer costs you time.