Kernel DevTools

Built-in developer tools for Kernel Browser — console, network, DOM, storage, CSS inspector, and more.

Kernel DevTools adds a full suite of developer tools directly into your browser's DevTools panel — everything you need to build, debug, and audit web apps, without switching between tabs or installing multiple extensions. ── TOOLS INCLUDED ── 🌐 Network Inspector View every request made by the page. Filter by type (Fetch/XHR, JS, CSS, WebSocket), inspect request and response headers, preview response bodies, and check timing — all in one place. 🖥 Console Full console with timestamps, source file links, and log level filtering. Evaluate JavaScript live with the built-in JS Eval bar. Never lose a log again. 🎭 Mock API Interceptor Intercept any network request and return a custom response — no backend or proxy needed. Match by prefix, exact URL, or regex. Set status code, response body, and artificial delay. Perfect for testing edge cases and error states. 🔒 Security Suite Audit any site's HTTP security headers (HSTS, CSP, X-Frame-Options, Referrer-Policy, and more) with instant A–F grading. Spot missing or misconfigured headers at a glance. 📜 Certificate Inspector View the full TLS certificate for any site — protocol version, key algorithm, validity dates, issuer, and Subject Alternative Names. No more digging through browser certificate dialogs. 💾 Storage Editor Browse, edit, add, and delete localStorage, sessionStorage, and cookies in a clean table view. Click any key to edit its value inline and save instantly. 🔌 WebSocket Monitor Capture and inspect every WebSocket message sent and received — direction, payload, size, and timestamp. Essential for debugging real-time apps. 🛡 Tracker Map See every third-party tracker loaded by the page — analytics, ad networks, fingerprinting scripts — categorised and counted. 🎨 CSS Inspector Inspect and live-edit computed styles, applied rules, and CSS variables on any element. ⚡ Performance Timeline Visualise page load performance: resource timing, long tasks, and paint events in a scrollable flame chart. 🌍 DNS Leak Checker Verify your DNS queries are not leaking outside your VPN or proxy. ── WHY KERNEL DEVTOOLS ── ✔ Free to use — core tools are always free ✔ No tracking, no analytics, no data collection ✔ Everything runs locally in your browser — no data ever leaves your device ✔ One extension replaces a dozen bookmarklets and separate tools ✔ Works on any website, any framework Built for developers who want their tools fast, private, and always available.