Kitbox

The developer toolkit that lives in your browser. 39 tools, 100% offline — no account, no tracking, no ads.

Kitbox is the developer toolkit that lives in your browser toolbar. Every small utility you reach for during the day — formatting JSON, decoding a JWT, generating a UUID, converting timestamps, checking a regex — is now one click away, in a single fast popup. No more hunting for that one site you bookmarked, no more juggling five separate single-purpose extensions. WHY KITBOX Most developer tool extensions fall into one of two traps: they're single-purpose (so you end up installing ten of them), or they're "all-in-one" bundles that quietly track you, show ads, or get sold to a new owner who turns the extension into adware. Kitbox is built differently. → 100% local. Every tool runs entirely in your browser. Nothing you type or paste is ever sent anywhere. → No account, no sign-up, no email required. → No ads, no upsells, no tracking scripts. → No special permissions. Kitbox only uses local storage to remember your preferences — nothing else. WHAT'S INSIDE Convert & Format - JSON Formatter & Validator - JSON ⇄ YAML ⇄ CSV converter - Base64 encode/decode - URL encode/decode - Number base converter - HTML entity encoder Text & Code - Regex tester with live match highlighting - Text diff checker - Case converter (camelCase, snake_case, kebab-case, etc.) - Lorem Ipsum / dummy data generator - Text statistics - String inspector Dev Utilities - JWT decoder - Hash generator (SHA-1, SHA-256, SHA-384, SHA-512) - UUID / ULID / Nano ID generator - Timestamp converter - QR code generator - Password generator - Cron expression builder - JSON → TypeScript interface generator Design & Inspect - Color converter (HEX, RGB, HSL) - CSS unit converter - Image compressor - Image → Base64 - Image EXIF viewer - Image color extractor - SVG → Data URI …and more added every week. BUILT FOR SPEED → Instant search — start typing and find any tool immediately → Keyboard shortcuts — Cmd/Ctrl+K to search from anywhere → Pinned & recently used tools, always one click away → Dark mode by default, light mode available → Clean, distraction-free design — one tool at a time, zero clutter New tools are added weekly. If there's a utility you wish existed, reach out at harsharora.digital@gmail.com Privacy policy: https://sites.google.com/view/kitbox-developer-toolkit