Online tools that just work
71 free tools that run right in your browser. No sign-up, no install, and nothing you type is uploaded.
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Money & Finance
Loans, mortgages, savings, exchange rates
Currency Converter Type an amount and pick two currencies to convert at today’s mid-market rate. A quick table shows common amounts, and a second table compares major currencies against the US dollar. Loan Calculator Work out the monthly payment on a personal loan, the total interest you will pay, and the real APR once the origination fee is counted, so you can compare loan offers side by side. CD and Savings Interest Calculator See how much interest a CD or savings account will earn. Enter the deposit, the APY or APR and the term, and get your interest, ending balance and a month-by-month schedule.
Calculators
Tips, sales tax, GPA, fractions, BMI
Online Calculator A full-size calculator that works on any device: switch between basic and scientific modes, type with your keyboard, and reuse earlier answers from the history list. Tip Calculator Enter the bill, choose a tip percentage and how many people are paying. You get the tip, the total and exactly what each person owes, with optional rounding to whole dollars. BMI Calculator Enter your height and weight to see your body mass index, where it falls on the WHO scale, and the healthy weight range for your height. Mortgage Calculator Estimate your monthly house payment, including principal, interest, property tax, homeowners insurance and HOA dues, and see how much interest you will pay over the life of the loan. GPA Calculator Add your classes with a letter grade and credits to see your GPA on the 4.0 scale, weighted for Honors and AP, your new cumulative GPA, and what you need to hit a target. Sales Tax Calculator Add sales tax to a price or take it out of a total. Pick a state for its 2026 statewide rate, or type the combined state and local rate from your receipt. Fraction Calculator Type two fractions, mixed numbers or decimals and pick an operation. You get the answer in lowest terms, as a mixed number and as a decimal, with every step written out. Percentage Calculator Four common percentage problems on one page, each with the formula written out: a percent of a number, what share one number is of another, percent change, and adding or removing a percentage. Unit Converter Convert between US customary and metric units in one place: length, weight, temperature, area, volume, speed and data. Results update as you type, with every unit listed side by side. Compound Interest Calculator See how a starting deposit and regular monthly savings grow when interest earns interest. Change the rate, years or compounding frequency and the year-by-year table updates instantly. Discount Calculator Find the sale price and your savings in seconds. Stack an extra coupon, compare BOGO and spend-and-save deals as a single percent off, and add sales tax to see what you will pay at the register. Split the Bill Calculator Enter the bill, the tax rate and the tip, and see exactly what each person owes. Split evenly or by what everyone ordered, with leftover cents handled for you.
Time & Date
Exact time, time cards, time zones, timers
New Year Countdown 2027 A live countdown to midnight on January 1, 2027 in your own time zone. It checks your clock against an accurate time server, switches to one huge number for the last minute, and fills your TV in full screen mode. Days Between Dates Calculator Find out exactly how many days are between two dates, or which date falls a set number of days before or after another. Results include weeks, business days and a years-months-days breakdown. Time Card Calculator Fill in when you clocked in and out each day and how long your unpaid breaks were. The calculator totals the week in hours and minutes and in decimal hours, splits out overtime, and works out gross pay. Chinese Zodiac Calculator Enter your date of birth to find your Chinese zodiac animal, element and yin or yang. Birthdays in January and February are checked against that year’s Lunar New Year, so they are never put in the wrong year. Age Calculator Enter your date of birth to see exactly how old you are in years, months and days, plus your age in months, weeks and days and how long it is until your next birthday. Exact Time The exact time for your time zone, corrected for any error in your device clock, with UTC and major world clocks and a countdown accurate to a tenth of a second. Countdown Timer Set a time, press Start, and an alarm sounds when the countdown reaches zero. Switch to full screen to show a big, readable timer in a classroom, meeting room or kitchen. Pomodoro Timer Alternate focused work and short breaks with the Pomodoro Technique: 25 minutes of focus, a 5 minute break, and a longer break after every 4 pomodoros. Every length is adjustable, and your settings stay in your browser. Time Zone Converter Enter a date and time in one zone and see the matching local time in every city on your list. Your own time zone is added automatically, and daylight saving time is handled for each date. Online Stopwatch Press Start to time anything to a hundredth of a second and record each lap with its lap and total time. Switching tabs or reloading the page does not stop the clock.
Text Tools
Word counter, case converter, text compare
Word Counter Paste or type your text to see the word count, character count, sentences and paragraphs update as you write, plus how long it takes to read or say out loud. Fancy Text Generator Type your name or a short line and see it in 25 Unicode font styles at once. Hit Copy and paste it into your Instagram bio, Discord nickname, TikTok profile or anywhere else, no font install needed. Diff Checker Paste the original and the edited text to see exactly which lines were added, removed or changed, with the changed words highlighted inside each line. Case Converter Paste any text and switch it to Title Case, Sentence case, ALL CAPS or lowercase in one click, or turn phrases into camelCase, snake_case and other programming names. Sort Lines & Remove Duplicates Paste any one-item-per-line list to alphabetize it, remove duplicates and blank lines, or add quotes, bullets and numbers to every line. Every step can be undone. Lorem Ipsum Generator Generate classic Lorem Ipsum placeholder text for mockups, wireframes and templates. Choose paragraphs, sentences, words or an exact character limit and copy it with one click.
PDF Tools
Merge, split, images to PDF
Merge PDF Combine several PDFs into a single file in the order you choose. Everything runs on your device, so your documents are never uploaded to a server. JPG to PDF Put photos, scans and screenshots into one PDF, one image per page, in the order you choose. Images stay on your device and are never uploaded. PDF to JPG Turn every page of a PDF into a JPG or PNG image, ready to post, paste into slides or attach where PDFs aren’t accepted. Conversion happens on your device. Split PDF Pull out the pages you need, drop the ones you don’t, or break a PDF into several files. Every page is shown as a thumbnail and nothing is uploaded.
Image Tools
Compress, convert, resize
HEIC to JPG Converter Convert iPhone HEIC photos to JPG or PNG in bulk so they open on Windows, in older software and in any upload form. Conversion happens on your device, so your photos are never uploaded. Image Compressor Shrink photos and screenshots in seconds. Set the quality, optionally cap the width, and download smaller files. Everything happens in your browser, so nothing is uploaded. Crop Image Drag a crop box over the part of the photo you want, snap it to common ratios for Instagram, YouTube or prints, and rotate or flip as needed. Everything stays on your device. Image Converter Convert images to JPG, PNG, WebP or AVIF, several at a time. Everything runs in your browser, so your photos never leave your device. Image Resizer Resize one image or a whole batch to exact pixel dimensions or a percentage, with one-click sizes for Instagram, Stories, YouTube thumbnails and US passport photos. Images are processed in your browser. Image to Base64 Converter Turn an image into a Base64 string you can paste straight into HTML, CSS, JSON or an email template. Encoding happens in your browser, so the image is never uploaded.
Health & Fitness
Calories, body fat, due date, water intake
TDEE Calculator Find out how many Calories you burn in a day and how much to eat to lose fat, maintain or build muscle. Enter your stats in pounds and feet or in metric units; results include protein, fat and carb targets. Due Date Calculator Enter the first day of your last period, your conception date or your IVF transfer date to get your estimated due date, how far along you are today and the key prenatal dates ahead. Ovulation Calculator Enter the first day of your last period and your usual cycle length to estimate your ovulation day, your fertile window and your next period, with a color-coded calendar for the next 3 or 6 cycles. Body Fat Calculator Measure your neck and waist (plus hips for women) with a soft tape, and this calculator estimates your body fat percentage with the US Navy formula, along with your fat mass, lean mass and where you land on the ACE chart. Water Intake Calculator See roughly how much water to drink each day based on your weight, activity, exercise and the weather, in fluid ounces or milliliters, plus how many glasses that is and when to drink them.
Online Tests
Typing speed, click speed, keyboard and screen tests
Typing Speed Test Find out how many words per minute you type. Type the passage below; correct letters turn dark, mistakes turn red, and you get your WPM and accuracy the moment time runs out. CPS Test Click the big pad below as fast as you can to measure your clicks per second. Choose a 1 to 60 second test, then see your rank, a per-second chart and your personal bests for each mode. Keyboard Tester Press any key and watch it light up on a full-size US keyboard. Find keys that don’t register, keys that stick, and how many keys your keyboard can detect at once. Reaction Time Test Wait for the screen to turn from red to green, then click as fast as you can. You get five rounds, early clicks don’t count, and your average is compared with typical adult reaction times. Mic Test Check that your microphone works before a Zoom, Teams or Discord call. Watch the level meter react as you talk, then record a short clip to hear exactly what others will hear. Webcam Test Make sure your camera works before a video call or interview. See a live preview along with the real resolution and frame rate your webcam delivers, and take a snapshot to check the picture. Dead Pixel Test Fill your screen with pure colors to spot dead, stuck and hot pixels in seconds, then use the gradient and uniformity patterns to check banding and backlight bleed.
Generators
Passwords, QR codes, random picks
Spin the Wheel Type your entries, press Spin in the middle, and the wheel lands on a random result. Use it to pick a name in class, settle what to eat, or run a prize giveaway. Everything stays in your browser. Password Generator Create a strong, random password in one click. Pick the length and character types and see how strong it is instantly. Passwords are generated on your device only. QR Code Generator Turn a link, Wi-Fi login or contact card into a QR code you can download as PNG or SVG. No account, no watermark, and the code works for as long as the content does. Random Name Picker Paste a list of names and draw a fair winner, split everyone into random teams, or put the whole list in random order. Your list stays in your browser. Random Number Generator Set a range and how many numbers you need, then get fair random numbers instantly. You can also roll up to 10 dice or flip a coin, and everything runs in your browser.
Developer Tools
JSON, Base64, hashes, regex
JSON Formatter Paste JSON to validate and pretty-print it instantly, or minify it into a single line. If it is invalid, you get the exact line and column plus a plain-English explanation of what is wrong. Base64 Encode and Decode Turn text into Base64 or decode a Base64 string back to readable text. Everything is handled as UTF-8, so accented letters, emoji and non-Latin scripts come back exactly as they went in. Color Converter Convert any CSS color between HEX, RGB, HSL and OKLCH, and see right away whether white or black text on it passes WCAG contrast. Works with transparency too. Roman Numeral Converter Type a number to get its Roman numeral, or type a Roman numeral to get the number. Each result is broken into parts, so you can see how it is built. Unix Timestamp Converter Check the current Unix timestamp, or convert between epoch time and human-readable dates. Seconds and milliseconds are detected automatically, and every result is shown in your local time, UTC and ISO 8601. URL Encode and Decode Percent-encode text for use in a URL, or decode %XX sequences back into readable text. Paste a full link below to break it into its scheme, host, path and decoded query parameters. Hash Generator Calculate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 for any text or file in one go. Paste a published checksum to confirm that a download is intact and untampered. Number Base Converter Type a whole number in binary, octal, decimal, hex or any base from 2 to 36 and every other base updates instantly. Big numbers stay exact, and the two’s complement panel shows how the value is stored in 8 to 64 bits. Regex Tester Type a pattern and some text to see every match highlighted, what each capture group grabbed, and what a replacement would produce. Runs on the JavaScript regex engine in your browser. UUID Generator Generate up to 100 UUIDs at once, either random version 4 or time-ordered version 7. Paste an existing UUID below to see which version it is and, for v1, v6 and v7, when it was created. JWT Decoder Paste a JWT to see its header and payload as formatted JSON. Time claims such as exp and iat are converted to dates in your time zone, and a live countdown tells you whether the token has expired. Markdown Preview Write Markdown on the left and see it rendered on the right as you type. Supports GitHub Flavored Markdown, and lets you copy the HTML or download the result as a file. HTML Entity Encoder / Decoder Escape text so it displays safely inside HTML, or turn entities like < & © back into normal characters. Includes a cheat sheet of the most common HTML entities.