Audit Raw HTTP Response Headers & HAR Payloads for Security & Caching

Q: Why audit HTTP headers locally in the browser instead of an external scanner?

Internal staging servers, localhost endpoints, and authenticated API responses cannot be reached by public scanners and often contain sensitive cookies.

Paste raw HTTP response headers or a HAR JSON entry to audit HSTS, CSP, X-Frame-Options, CORS policies, and Cache-Control directives with 100% local privacy.

✓ OWASP Header Security Audit Target Keyword: "http security headers and har analyzer online" (90,000/mo) Est. Ad RPM: $18 – $28

INPUT SOURCE 300 chars

HTTP/2 200 OK
date: Sat, 17 Oct 2026 12:00:00 GMT
content-type: application/json; charset=utf-8
cache-control: public, max-age=31536000, immutable
strict-transport-security: max-age=63072000; includeSubDomains; preload
x-content-type-options: nosniff
access-control-allow-origin: *
server: cloudflare

LIVE PROCESSED OUTPUT UTF-8 • CLIENT-SIDE

Processing...

Ready • 100% local execution Server Cost: $0.00 • Latency: <5ms

How to Use the HTTP & HAR Analyzer

STEP 01

Paste raw HTTP response headers from curl -I or Chrome DevTools into the left pane.
STEP 02

Review the parsed JSON header dictionary and automated OWASP security posture audit.
STEP 03

Fix missing headers (like Content-Security-Policy or X-Frame-Options) using the recommended snippets.

Frequently Asked Questions (HTTP & HAR Analyzer)

Why audit HTTP headers locally in the browser instead of an external scanner?

Internal staging servers, localhost endpoints, and authenticated API responses cannot be reached by public scanners and often contain sensitive cookies.