Kitbox

The developer toolkit that lives in your browser. 63 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 is now one click away, in a single fast popup. No more hunting for that bookmarked site. 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 beyond what each tool strictly needs. WHAT'S INSIDE Kitbox covers the full developer workflow across 59 tools in 7 categories. Format and convert data — paste messy input and get back clean, structured output. Convert between common data formats, encode and decode strings, validate markup, and reformat query languages. Inspect live pages — activate any Page Inspect tool and Kitbox reads from your current browser tab: discover what technologies a site uses, audit its meta tags and SEO data, explore its CSS design tokens, view cookies and local storage, extract links, and check response headers and security grades. Everything stays in your browser. Process images locally — compress, resize, and crop images, convert between formats, extract color palettes, pull EXIF metadata, and grab every image from a page. No uploads, no third-party services. Convert files — open spreadsheets and data files as clean sortable tables, and convert between document formats entirely on your device. Build and debug — generate secure passwords, unique identifiers, QR codes, and hashes. Test API endpoints, decode tokens, build cron schedules, preview regex patterns, and compare text differences — all in one place without leaving your tab. 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 regularly. 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