Six browser-based developer utilities. No sign-up, no server, no tracking. Everything runs locally in your browser.
Drag-and-drop or paste CSS/JavaScript to minify instantly. Uses csso and Terser — the same engines used by major build tools.
Format, validate, and diff-compare JSON. Syntax highlighting, collapsible trees, and real-time error detection.
Compress and resize images using Canvas. Batch process multiple files, preview results, download as zip.
Test regular expressions with real-time matching, capture groups, and flag controls. Instant visual feedback.
Decode and inspect JSON Web Tokens. View header, payload, and expiration info without any server contact.
Write Markdown and see a live rendered preview. Supports GFM tables, code blocks, and task lists.