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All tools

57 free online tools, ready to use. Results update as you type — nothing to install, no signup.

Finance & Money

All finance & money →
CD / APY Calculator CD value at maturity, interest earned, and APR-to-APY conversion. Compound Interest Calculator What savings grow to, with regular deposits and any compounding frequency. Credit Card Payoff Calculator How long a fixed payment takes, what interest costs, and what extra payments save. Currency Converter Convert currencies with daily reference rates from central-bank data. Loan Calculator Monthly payment, total interest and a year-by-year breakdown for any loan. Mortgage Calculator How mortgage payments work — principal, interest, taxes and insurance. Paycheck Calculator Estimate take-home pay from hourly or salary wages, W-4 choices, deductions and up to three work states. Savings Goal Calculator The monthly deposit needed to reach a target by a chosen date. Tip Calculator Tip, total and an even split — including who pays the odd cent.

Generators & Makers

All generators & makers →
Coin Flip Flip one coin or a hundred and see every result in order. Dice Roller Roll d4 to d100, several at once, with a modifier — fair every time. Favicon Generator Turn one logo into a complete favicon and web-app icon package. Lorem Ipsum Generator Placeholder text by the paragraph, sentence, word or list item — plain or as HTML. Password Generator Create a strong random password — choose the length and character types, copy it in one click. QR Code Generator Make a QR code for a link, Wi-Fi network, phone number or email — styled, and free to download. Random Number Generator Draw one number or a hundred from any range, with no repeats if you need them. UUID Generator Generate version 4 or time-ordered version 7 identifiers, up to 100 at a time.

Converters & Math

All converters & math →
Fraction Calculator Add, subtract, multiply and divide fractions, with exact answers in lowest terms. GPA Calculator Term and cumulative GPA, weighted or unweighted, on whichever scale your school uses. Percentage Calculator Calculate percentages, percentage changes, and the original number in seconds. Roman Numeral Converter Convert numbers to Roman numerals and back, in either direction. Temperature Converter Convert Celsius to Fahrenheit and back, side by side. Unit Converter Convert metric and Imperial area, length, temperature, volume, and weight units side by side.

Health & Fitness

All health & fitness →
Age Calculator Find your exact age in years, months and days — plus weeks, next birthday and zodiac sign. BMI Calculator Calculate your body mass index from your height and weight in metric or imperial units. Body Fat Percentage Calculator A circumference estimate with fat and lean mass shown separately. Calorie Calculator Daily calories to lose, maintain or gain weight, from your BMR and activity. Due Date Calculator Your estimated due date from your last period, conception or an IVF transfer. Ideal Weight Calculator The healthy weight range for your height, and what the classic formulas say. Macro Calculator Protein, carbohydrate and fat targets for your calories and your goal. One-Rep Max Calculator Estimate your one-rep max from a safer submaximal set. Running Pace Calculator Pace per kilometer and mile, speed, and same-pace race times. Water Intake Calculator Adult water-intake references, including food, beverages and exercise.

PDF & Documents

All pdf & documents →
PDF to Word Converter Turn digital or scanned PDFs into editable Word documents — privately in your browser.

Developer Tools

All developer tools →
Base64 Encode & Decode Convert text to Base64 and back, with full Unicode support. Hash Generator MD5, SHA-1, SHA-256, SHA-384 and SHA-512 of any text, all at once. HTML Entity Encoder & Decoder Escape HTML-sensitive text or decode named and numeric character references. JSON Formatter Format, validate, and find out exactly where it broke. JWT Decoder Inspect a JWT header and payload locally — without mistaking decoding for verification. Regex Tester Test a pattern against real text — without freezing the tab. Unix Timestamp Converter Epoch time to a date you can read, and back — in any unit. URL Encoder & Decoder Percent-encode a value or a whole URL, and decode it back again.

Text & Writing

All text & writing →
Case Converter UPPERCASE, lowercase, Title Case, Sentence case and the programmer cases. Character Counter Characters with and without spaces, live. Remove Duplicate Lines Delete repeated lines from a list, with optional sorting and blank-line cleanup. Text Diff Checker Compare two versions of a text and see exactly which lines changed. Word Counter Count words, characters, sentences, paragraphs and reading time as you type.

Business & Ecommerce

All business & ecommerce →
Profit Margin Calculator Profit, margin and markup — or the price needed for a target margin.

Date & Time

All date & time →
Business Days Calculator Working days between two dates — your weekend, your holidays. Countdown Timer Set it, start it, hear it — and it keeps time in a background tab. Date Difference Calculator How long between two dates — in years and months, or in plain days. Day of the Week Calculator Find the weekday for any past or future date. Military Time Converter Convert military and standard time in either direction. Pomodoro Timer Focus, break, repeat — and it keeps track of where you are in the cycle. Stopwatch Count up, with laps — and it does not lose time when you look away. Time Zone Converter One moment, in every zone you care about — with the date shift named. Week Number Lookup Find the ISO week number and its Monday-to-Sunday dates.

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