What is HTTP Header Analyzer?
Free online HTTP header analyzer. Enter any URL to inspect and parse response headers. Security analysis (CSP, HSTS, X-Frame-Options, etc.) and performance header detection. Essential for developer troubleshooting and site optimization.
▶Use Cases4 scenarios
- ◆Security header check
- ◆Performance analysis
- ◆CDN config verification
- ◆API debugging
▶How to Use4 steps
- 1Enter target URL
- 2Click Analyze
- 3View all response headers
- 4See security score and tips
▶Features4 features
- ✓Security analysis
- ✓Performance headers
- ✓Detailed parsing
- ✓Free
▶FAQ6 questions
What is HTTP Header Analyzer?
An online HTTP header analyzer. Inspect and parse response headers. Supports multiple input formats with one-click copy or download. All operations run locally in your browser — no uploads.
Can it analyze authenticated URLs?
Currently, only publicly accessible URLs can be analyzed.
How is the security score calculated?
Based on presence of key security headers (CSP, HSTS, X-Frame-Options, etc.).
What security headers are analyzed?
CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, and Permissions-Policy.
Can it analyze internal URLs?
Only publicly accessible URLs. Internal URLs behind authentication are not reachable.
Does it check performance headers?
Yes. It detects Cache-Control, ETag, Content-Encoding, and CDN headers.