Developer Tool

HTTP Header Checker

Inspect response status codes, redirect chains, server software disclosures, compression, and caching headers for any public URL.

✓ 100% Free✓ No Account Required✓ Zero Data Tracking

Fetches the URL server-side and inspects status codes, redirects, caching policies, and server information.

Quick test:

Deep Inspection of HTTP Response Behavior

Web servers communicate critical caching instructions, compression encodings, and connection rules through HTTP response headers. Inspecting headers helps web engineers debug CDN edge caching, eliminate latency-inducing redirect chains, and verify compression performance.

Header Categories Analyzed

Caching & Performance: Evaluates Cache-Control, ETag, Expires, and Vary directives.
Compression & Encoding: Detects Content-Encoding (gzip, Brotli br, zstd) and byte sizes.
Redirect Chain Tracker: Pinpoints unnecessary intermediate 301/302 redirects slowing down page loads.
Information Disclosure: Flags headers that inadvertently leak backend software versions.

Help & FAQs

Frequently Asked Questions

Common questions and technical guidance about this tool.

HTTP response headers are metadata key-value pairs sent by a web server alongside requested HTML/assets to instruct the browser how to handle caching, authentication, compression, and security.

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