Online HTTP Security Header Analyzer
Inspect HTTP response headers, audit Content Security Policy (CSP), HSTS, and X-Frame-Options, and calculate your site's security score instantly.
About This Tool
ToolSnippet's HTTP Security Header Analyzer is a web security auditing tool for frontend and DevOps engineers. It parses raw HTTP headers to identify missing defense-in-depth headers, information leakage banners, and inefficient caching configurations.
Key Features
Automated Security Health Grade (A+, A, B, C, D, F)
Audit of 8+ major security defense headers
Information leakage and server fingerprint detection
Caching policy validation (Cache-Control, ETag)
Quick sample presets for benchmarking
1-click copy for remediation suggestions
How to Use
- 1Paste your raw HTTP response headers into the input editor.
- 2Or click a quick preset (Secure Production Headers, Legacy Server, Default Nginx).
- 3View your calculated Security Grade (A+ to F).
- 4Inspect the detailed breakdown of mandatory security headers and recommended fixes.
- 5Copy remediation snippet recommendations for Nginx, Apache, or Cloudflare.
Why Use ToolSnippet HTTP Security Header Analyzer?
Security Hardening: Identify missing CSP, HSTS, and Clickjacking headers before vulnerability scanners flag them.
Information Leakage Detection: Flags exposed 'Server' and 'X-Powered-By' backend framework banners.
100% Client-Side: Zero proxy servers, ensuring internal staging headers remain confidential.
Tips for Best Results
- Aim for an A+ grade by adding a strict Content-Security-Policy and HSTS header.
- Ensure 'X-Frame-Options: DENY' or 'SAMEORIGIN' is configured to prevent clickjacking attacks.
Frequently Asked Questions
Which HTTP security headers are most critical?
The top critical security headers are Content-Security-Policy (CSP), Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, and Referrer-Policy.
Why is exposing 'X-Powered-By' considered a security risk?
The X-Powered-By header (e.g. Express, PHP/8.1) leaks exact backend framework versions to attackers, making it easier to target known CVE vulnerabilities.