Free online utilities.

Nothing matches.

• Stopwatch A square digital clock. Laps on the way up, or a time attack on the way down.
• Age calculator Count years, months, and days from a birthday to any date.
• Date calculator Count the days between two dates, or add days to a date.
• Reaction time Click when the panel turns green and read the milliseconds.
• Typing test Type the words for a set time and see words per minute and accuracy.
• Zodiac sign Enter a month and a day and see the sign, the element, and the mark.
• Pet years Turn a dog or cat age into human years.
• Birthstone Name the one stone for a birth month from the 1912 list.
• Chinese zodiac Name the animal and element of a birth date.
• Moon phase Name the phase of a date and how much of the moon is lit.
• Life path The Pythagorean life-path number of a birth date.
• Planet age Calendar days divided by a planet’s mean year.
• BMI calculator Turn adult height and weight into a body mass index.
• Unit converter Turn centimeters into inches, kilograms into pounds, and Celsius into Fahrenheit.
• Fraction calculator Simplify, add, subtract, multiply, or divide fractions.
• GCD and LCM Find the greatest common divisor and the least common multiple.
• Average Divide the sum of the numbers by how many there are.
• Resistor colors Read a resistor from four or five color bands.
• Crop a photo Keep one region of a picture and save it.
• Aspect ratio calculator Simplify a width and height, or fit one side to a ratio.
• Compress Shrink a JPEG, PNG, or WebP picture in the browser.
• Join PDFs Put several PDFs into one file, and keep only the pages you want.
• Photos to PDF Lay photos in order and save them as one PDF.
• Make a seal Type a name and see circle, square, and oval seals in several faces.
• Make a signature Type a name to see handwritten signatures, or draw your own.
• Count characters Count letters, words, lines, UTF-8, and text bytes as you type.
• Case converter See uppercase, lowercase, title case, and sentence case together.
• Fancy text Turn letters and digits into bold, circled, dotted, and other Unicode styles you can paste.
• Love calculator Add the letter codes of two names and show a percent from 0 to 100.
• Roman numerals Convert the numbers 1 through 3999 to Roman numerals and back.
• Morse code Turn text into International Morse code, and Morse code back into text.
• Caesar cipher Shift A through Z, including the 13-step ROT13.
• Password generator Choose a length and the kinds of characters, and a password appears.
• QR code maker Type an address or a note and the code is drawn at once.
• Barcode maker Draws CODE128, CODE39, EAN-13, UPC-A, and ITF.
• Color converter Turn HEX, RGB, and HSL into the same color.
• Random number Draw whole numbers from a minimum through a maximum.
• Dice roller Roll faces from 1 through the number of sides and add them.
• Coin flip Flip one coin or a handful and count heads and tails.
• Spin the wheel Put one name on each line and spin for a winner.
• UUID generator Makes IDs that do not collide, as many as you need.
• Unix time Turns a number into a date, and a date into a number.
• URL encoding Turns characters a link cannot hold into %XX, and back.
• Base64 encoder Turn UTF-8 text into standard Base64 and back.
• Base converter Convert binary, octal, decimal, and hexadecimal.
• Pixels to rem Divide pixels by the root font size, or multiply rem by it.
• ULID generator Makes 26-character IDs that sort in time order.
• Subnet calculator Works out a range from CIDR or an IP and a mask.
• Hash generator Makes MD5 and SHA fingerprints of text or a file.
• Punycode converter Turns a Unicode domain and punycode into each other.
• UTM builder Adds utm values to an ad link.
• Cron expression Reads a five-field schedule and shows the next times.
• JSON formatter Indents JSON and also reads a looser notation.
• JWT decoder Reads a token’s header and payload, and can also mint one.
• Regex tester Colors the places where a pattern matches the text.
• URL parser Splits a link into protocol, host, port, path, and query.
• Lorem ipsum Makes Latin filler and Korean filler as paragraphs, sentences, or words.
• SQL formatter Breaks SELECT and JOIN onto lines for the dialect you pick.
• cURL to code Turns a curl command into JavaScript, Python, or Go.
• HMAC generator Signs a message with SHA-256, SHA-512, SHA-1, or MD5.
• CSV to JSON Turns a spreadsheet export into indented JSON.
• Remove spaces Collapse repeated spaces, blank lines, and invisible characters.
• Sort lines Reorder each line in dictionary order, numeric order, and IP order.
• Compare text Put two passages side by side and mark the lines and words that differ.
• Tip calculator Add a percent to a bill and split it by the number of people.
• Discount calculator Find the price from a list price and a percent off.
• Percentage calculator Find a percent of a number, what percent one number is, or the change.
• Loan payment calculator Monthly payment from an amount, a yearly rate, and a term.
• Compound interest calculator Grow one amount by a yearly rate, compounded on a schedule.
• Margin calculator Turns a per-1,000 price and an exchange rate into a unit cost and a margin.
• Time calculator Add and subtract hours, or measure the time between two clocks.
• VAT calculator Add 10% to a net price, or take it back out of a total.
• 3.3% withholding Find the 3.3% taken from freelance income, and the amount that remains.
• Annual leave Use a start date and a reference date to see how many leave days exist now.
• Severance pay Work out Korean severance from the dates and the last three months of pay.
• Unemployment benefit Turn the last three months of pay into a daily amount and a number of days.
• Savings interest Find the maturity amount for a monthly plan or a lump-sum deposit.
• Acquisition tax Work out Korean housing acquisition tax from the price and how many homes this makes.
• Brokerage fee Find the legal cap for a Korean home sale, jeonse, or monthly rent, including VAT.
• Night and overtime pay Turn an hourly wage and night, overtime, and holiday hours into the extra pay.
• Korean name in English Spell a Korean name the way a passport often does.