Web tools
6 toolsThe small tools that save a developer ten minutes a dozen times a day: format, validate, convert and inspect, all in the browser with nothing uploaded anywhere.
All Web tools
JSON Formatter
Paste messy JSON, get it back clean and readable, with the exact line and column of any error. Nothing leaves your browser.
Open toolUUID Generator
Generate random v4 or time-ordered v7 UUIDs, one or five hundred at a time, and copy or download them in a click. Uppercase, hyphen and brace formatting are all one toggle away. Then paste any UUID back in to read its version, its variant, and for a v7 the exact moment it was created. Everything is minted in your browser with the Web Crypto API, so no identifier ever touches a server.
Open toolRegex Tester
Build and debug a regular expression against your own text and watch every match highlight as you type. See the capture groups broken out, named and numbered, preview a find-and-replace, toggle the flags one at a time, and start from a library of common patterns. Nothing you enter leaves your browser, and a built-in cheatsheet is one click away.
Open toolJWT Decoder & Verifier
Paste a JSON Web Token and it is decoded instantly in your browser: the header and payload laid out as readable JSON, every registered claim explained in plain language, and each time claim turned into a real date with a live verdict on whether the token is active, expired or not yet valid. Then go one step further than any decode: paste the secret or the PEM public key and it verifies the signature for real with the Web Crypto API. Your token, secret and key never leave the page.
Open toolPassword Generator
Generate a strong random password or a memorable word passphrase, drawn from your browser's own cryptographically secure randomness so nothing is ever transmitted, logged or stored. Tune the length, the character sets and the wordlist, and watch a live strength meter that does not guess: because the tool made the secret, it knows its exact entropy in bits and shows an honest estimate of how long it would take an attacker to crack. Copy it and go.
Open toolCSS Minifier & Beautifier
Paste your CSS and either minify it to the smallest valid form for a faster website, or beautify it into a clean, consistently indented layout you can actually read. It parses the CSS properly, so strings, data URIs and calc() expressions are never broken, and it shows you the exact bytes saved. Everything runs in your browser, so nothing is uploaded.
Open tool