HTTP Header Analyzer - Free Tool | ManyPI
HTTP Header Analyzer
Inspect the response headers returned by any URL. Check for security headers, caching policies, and server information.
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.