HTTP Header Analyzer
Inspect the response headers returned by any URL. Check for security headers, caching policies, and server information.
Enter a URL to analyze its response headers
Peek Under the Hood
Web scraping isn't just about the HTML body. The server response headers contain a wealth of strategic information. They can tell you if a site is behind a CDN (like Cloudflare), what server technology they use (Apache, Nginx, IIS), and specific rules about caching or cookies that your scraper needs to respect.
Detect Anti-Bot & WAFs
Specific headers often reveal the presence of Web Application Firewalls (WAFs) or security services. Headers like `cf-ray`, `x-amz-cf-id`, or `server: cloudflare` give you immediate insight into the defenses you are up against, allowing you to tailor your scraping strategy accordingly (e.g., using residential proxies).
Debug 403/5xx Errors
When your scraper gets blocked, the HTML body might just say "Forbidden". The headers, however, often contain the clue. A `Retry-After` header tells you you've hit a rate limit. A `Www-Authenticate` header implies you need credentials. Use this tool to inspect headers on problematic sites to diagnose why your requests are failing.
Frequently asked questions
Learn about HTTP metadata and server responses
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