HTTP Trace & WebPerf Insights — René Dhemant

HTTP Trace & WebPerf Insights is an essential, all-in-one network debugging and performance auditing tool built specifically for developers, technical SEOs, and system administrators. It instantly tracks a webpage's complete network journey, transforming complex data into a clean, easy-to-read dashboard right in your browser toolbar.

Whether you are auditing a site migration, debugging API headers, or optimizing Core Web Vitals, this extension eliminates the need to constantly dig through complex DevTools tabs.

🌟 Key Features:

1. Comprehensive Redirect Tracing Instantly visualize complex redirect chains (301, 302, 307, etc.). See the exact path a request takes, including internal browser upgrades (like HSTS and HTTPS-First), preventing endless loops and SEO drop-offs.
2. Deep Header & Server Analysis Quickly inspect critical HTTP response headers, server IP addresses, and underlying tech stacks. It automatically flags important SEO directives like X-Robots-Tags, Canonical links, and caching behavior (including Cloudflare edge cache statuses).
3. Core Web Vitals & Performance Auditing Get an immediate snapshot of the page's performance. The dashboard calculates Time to First Byte (TTFB), Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), DOM Node counts, and total page weight directly from the native DOM Performance API.
4. Security & Protocol Insights Verify connection security at a glance. Easily check SSL/TLS certificate validity, expiry dates, issuing authorities, and see if the connection uses modern protocols like HTTP/3 (QUIC) or legacy HTTP/1.1.
5. Cookie & Asset Distribution Breakdown Automatically audit your Set-Cookie headers for missing security flags (HttpOnly, Secure, SameSite) to prevent vulnerabilities. View exactly how much of your page weight comes from external domains vs. origin assets.

Export & Share Need to share a trace with your team? Export the entire HTTP journey and performance snapshot as a clean JSON payload with a single click, or copy the raw text to your clipboard.

100% Privacy Focused: This extension processes all data locally on your device. No browsing history, network requests, or analytics are ever sent to external servers.