Runs entirely in your browser
In-browser tools. Zero servers.
Format, convert, generate, and calculate locally. Bookmark any tool — every page is a real, shareable URL.
1111 tools · Stays on this device
Flagship tools
- CalculatorsCalculatorAdd, subtract, multiply, and divide in the browser.
- TextWord counterCount words, characters, sentences, and reading time as you type.
- TextText diffCompare two texts and highlight added, removed, and changed lines.
- Encoding & dataJSON formatterValidate, pretty-print, and minify JSON in the browser.
- Encoding & dataJSON to TypeScriptInfer TypeScript interfaces from JSON, including nullables.
- Crypto & securityPassword generatorCryptographically random passwords with an entropy meter.
- Crypto & securityJWT decoderDecode JWT header and payload, show expiry — no verification library.
- DeveloperRegex testerLive regex matches, capture groups, and a cheatsheet.
- DeveloperCron to humanExplain a cron expression in plain language.
- DeveloperMeta tags generatorBuild title, description, robots, and canonical tags.
- DeveloperOpen Graph tags generatorGenerate og: and twitter: meta tags for link previews.
- DeveloperJSON-LD generatorScaffold schema.org JSON-LD for WebApplication, FAQ, and more.