Kitbox

About

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 [email protected]

Privacy policy: https://sites.google.com/view/kitbox-developer-toolkit