HTTP Header Analyzer Pro

HTTP Header Analyzer Pro is a powerful developer tool for inspecting HTTP requests, response headers, redirects, server IP addresses, geolocation, and performance metrics — all in one clean interface. Key Features Two Analysis Modes • On Demand — click Analyze to reload the page and capture all data. No background activity, zero resource usage when idle. • Always On — automatically monitors every page load. The extension icon shows a color-coded HTTP status badge: green (2xx), orange (3xx), red (4xx), purple (5xx). Headers Inspector — View all request and response headers organized into logical groups: Main, Cache, Security, CORS, Cookies. Copy individual headers or all at once with one click. Redirect Chain — See the complete redirect path with HTTP status codes, server IPs, and Location headers at each step — invaluable for debugging redirect loops and tracking URL changes. Geo IP — Three Independent Sources — Click the country flag card to open the dedicated Geo tab. Data is provided from three independent sources — DB-IP, ip-api, and MaxMind — displayed side by side so you can compare results. The ip-api source also shows Proxy, Hosting, and Mobile flags for each IP. Security & Performance Audit — Instantly check HTTPS status, HTTP protocol version (HTTP/1.1, HTTP/2, HTTP/3 / QUIC), HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and more. Performance metrics include TTFB, DOM ready time, full load time, and transfer size. Analyze Any URL — Enter any URL in the address bar and press the arrow button — the extension opens it in a background tab, captures all data, and closes it automatically. No need to navigate away from your current page. TLS Details (Chrome / Chromium only) — View cipher suite, TLS protocol version, and certificate information via Chrome DevTools Protocol. Multi-language Interface — Available in English, Russian, Spanish, Arabic, Chinese, and French. Privacy — All header analysis is performed locally in your browser. The only external request is to the geolocation service to look up server IP addresses — no personal data, browsing history, or page content is ever transmitted. Perfect for: • Web developers and backend engineers debugging HTTP issues • DevOps and sysadmins monitoring server responses • Security researchers analyzing headers and TLS configuration • SEO specialists tracking redirects and cache headers