Free, private and instant: everything runs in your browser.
List it for free: working tools earn a dofollow link in the directory, every other real project gets a Showcase shelf, and all of it lands in the catalog AI assistants read.
Free online JSON formatter and validator. Beautify, minify and validate JSON instantly in your browser. No data leaves your device.
Free secure password generator. Create strong, random passwords with custom length, symbols, numbers and cases. Cryptographically random, private.
Free percentage calculator. Work out what X% of Y is, what percent one number is of another, and percentage increase or decrease instantly.
Free word counter and character counter. Count words, characters, sentences, paragraphs and reading time as you type. 100% private.
Free BMI calculator. Calculate your Body Mass Index in metric or imperial units and see your weight category instantly. Private, no sign-up.
Free QR code generator. Turn any URL or text into a real, scannable QR code entirely in your browser, then download it as a PNG. No sign-up, nothing uploaded.
Free cm to inches converter. Convert centimeters to inches instantly using the exact factor (1 inch = 2.54 cm). Live result as you type, no sign-up.
Free mortgage calculator with amortization schedule. Estimate your monthly home loan payment, total interest and payoff over the full term in seconds.
A Photoshop-class editor that runs in a browser tab.
ExternalThe regex playground that explains every token as you type.
ExternalThe hand-drawn whiteboard the whole internet sketches on.
ExternalThe translator people switch to for natural-sounding output.
ExternalType a question, get computed knowledge back.
ExternalThe quick and simple editor for cron schedule expressions.
ExternalTap the spacebar until the palette feels right.
ExternalCollaborative docs where even the server cannot read your work.
A free developer toolkit: Base64, JSON, hashing, UUID, timestamps, data format converters and more. No sign-up, all in your browser.
84 toolsA free student toolkit: GPA and grade calculators, geometry, algebra, statistics and science formula tools. No sign-up, in your browser.
118 toolsA free writing toolkit: word and character counters, readability scores, passive voice and filler word finders, case converters. In your browser.
72 toolsA free crypto toolkit: profit and loss, position size, liquidation price, impermanent loss, gwei and wei converters. No wallet connect.
27 toolsA free home toolkit: paint, tile, flooring, concrete and mulch calculators, BTU sizing, rent affordability and cap rate. In your browser.
24 toolsA free money toolkit: savings goals, debt payoff, FIRE, compound interest, budgeting and salary calculators. No sign-up, in your browser.
46 toolsA free health toolkit: BMI, TDEE, macros, heart rate zones, one rep max, running pace and body fat calculators. In your browser.
46 toolsA free design toolkit: color picker, palette and gradient generators, contrast checker, image resize, crop and convert. In your browser.
34 toolsBuilding with AI? Every tool here is listed in our free API and llms.txt.