CrumbKit

A privacy-first cookie editor. Open source, zero tracking, no ads.

CrumbKit puts you back in control of your browser cookies. Whether you're debugging a login flow, inspecting what trackers a site drops on you, or exporting cookies to share across tools — CrumbKit gives you the full picture and the tools to act on it. 🎯 WHAT YOU CAN DO WITH CRUMBKIT Debug authentication & sessions Stuck on a login bug? View and edit session tokens, switch auth states, and test different user scenarios — all in seconds. Audit privacy & tracking Every site you visit leaves crumbs. CrumbKit classifies every cookie into five categories — Essential, Functional, Analytics, Advertising, Social — and gives the site a privacy score from 0 to 100. You'll know instantly if a site is harmless or watching your every move. Export & import cookie sets Share cookies between browsers, save test fixtures, or pipe them into curl and wget. Supports JSON, Netscape format, and cURL command export. Import from JSON or Netscape with one click. Clean up with confidence Bulk-delete cookies but keep the ones you actually need. Set up a domain whitelist so login cookies for your bank, email, and tools survive cleanup. Every delete is undoable (Ctrl+Z, up to 50 actions). Search, edit, create — fast Real-time search across all cookies on the current tab. Create or edit cookies right from the popup. No page reloads, no digging through Chrome settings. ✅ WHY INSTALL CRUMBKIT (AND NOT SOMETHING ELSE) 🔒 Actually private. Verifiably. CrumbKit makes zero network requests — period. Open Chrome DevTools and see for yourself. No analytics, no telemetry, no "error reporting," no phoning home. The most popular cookie editor was pulled from the store; its replacement was caught stealing Facebook credentials. With CrumbKit, the code is MIT open source — you don't have to trust us, you can read every line. 💰 Completely free. No catch. No Pro tier, no subscription, no ads, no "premium features" locked behind a paywall. Everything is free, forever. We make other developer tools — CrumbKit is our gift to the community. ⚡ Fast, clean, modern. Built from scratch for Manifest V3. Vanilla JavaScript — no bloated frameworks. Dark mode and light mode, system-aware. Under 85KB total. 🛡️ Privacy scoring built in. CrumbKit doesn't just show you cookies — it tells you what they're doing. Powered by an offline classification engine with 101 known tracking domains. Color-coded scores make it obvious which sites respect your privacy and which don't. 🧠 Undo & whitelist — because mistakes happen. Deleted the wrong cookie? Ctrl+Z. Accidentally wiped all cookies? Not if they were on your whitelist. These aren't luxury features — they're the safety net every cookie tool should have but none do. 👥 BUILT FOR • Web developers — Debug sessions, switch auth states, test cookie behavior • QA engineers — Import/export test cookie sets, reproduce bugs across environments • Backend developers — Inspect Set-Cookie headers, verify cookie attributes • Security researchers — Audit tracker counts, analyze cookie configurations • Privacy-conscious users — See who's tracking you, clean up with a click 🏷️ AT A GLANCE ✅ View, create, edit, delete cookies ✅ Batch delete with domain whitelist ✅ Export: JSON, Netscape (curl/wget), cURL ✅ Import: JSON, Netscape ✅ Cookie classification (5 categories) ✅ Privacy score 0–100 per site ✅ Undo (Ctrl+Z, up to 50 actions) ✅ Dark/light mode ✅ Zero network requests ✅ MIT open source — github.com/wayknow/crumbkit ✅ Under 85KB, no frameworks, no bloat