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HTTP Header Security Auditor

Inspect HTTP response and request headers, audit OWASP security compliance, calculate security grades (A+ to F), and generate production-ready server configuration directives.

Quick Answer & Summary

The HTTP Header Security Auditor is a fast, accurate Network Tools utility designed to inspect http response and request headers, audit owasp security compliance, calculate security grades (a+ to f), and generate production-ready server configuration directives. entirely in your browser with zero server data storage.

HTTP Header Inspector & Security Policy Auditor

Analyze HTTP request/response headers, assess OWASP security posture, calculate hardening grades (A+ to F), and export server configuration snippets.

Presets:
B

Security Posture Score: 85 / 100

Evaluated across 6critical security headers & information leakage rules.

Content-Security-Policy

CSP present but allows unsafe-inline
MEDIUM Risk15 / 25 pts

CSP prevents Cross-Site Scripting (XSS), data injection, and unauthorized script execution by restricting asset origins.

Found Value:default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; object-src 'none'; base-uri 'self';
Recommended Value:default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self';

Strict-Transport-Security

HSTS Strict HTTPS Enforced
LOW Risk20 / 20 pts

HSTS guarantees that web browsers only communicate with your domain over secure TLS/HTTPS, preventing SSL stripping.

Found Value:max-age=63072000; includeSubDomains; preload

X-Frame-Options

Clickjacking Protection Active
LOW Risk15 / 15 pts

X-Frame-Options prevents malicious sites from embedding your application inside iframes to execute clickjacking attacks.

Found Value:DENY

X-Content-Type-Options

MIME Type Sniffing Prevention Active
LOW Risk15 / 15 pts

X-Content-Type-Options: nosniff prevents browsers from interpreting non-executable MIME types as executable scripts.

Found Value:nosniff

Referrer-Policy

Referrer Privacy Policy Configured
LOW Risk10 / 10 pts

Restricts the amount of sensitive URL and session metadata sent in the HTTP Referer header to external destinations.

Found Value:strict-origin-when-cross-origin

Permissions-Policy

Browser Hardware Permissions Restricted
LOW Risk10 / 10 pts

Permissions-Policy allows developers to explicitly disable access to camera, microphone, GPS, and sensitive hardware APIs.

Found Value:camera=(), microphone=(), geolocation=(), payment=()

OWASP Secure Headers Project, RFC 9110 & Defense-in-Depth

Modern web security relies heavily on HTTP response headers as the first line of defense between server-side application logic and the browser client runtime.

Critical Security Headers Explained

  • Content-Security-Policy (CSP): Declares approved sources for script execution, frame embedding, stylesheet loading, and form actions.
  • Strict-Transport-Security (HSTS): Forces HTTPS communication with customizable expiration timers (max-age=63072000) and subdomain coverage.
  • X-Frame-Options: Defends against Clickjacking UI redressing attacks by controlling whether the page can be rendered within <iframe> tags (DENY or SAMEORIGIN).
  • X-Content-Type-Options: Disables MIME-type sniffing (nosniff), requiring browsers to strictly respect declared Content-Type headers.
  • Referrer-Policy: Governs how much URL path and query string data is broadcast in the Referer header during outbound link navigations.
  • Permissions-Policy: Granularly enables or disables browser hardware APIs (e.g. webcam, microphone, geolocation, payment).

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Toolbox Editorial TeamVerified Authors

Systems & Security Engineers • Applied Cryptography & High-Performance Web Tools

Updated:
100% In-BrowserZero server storage
Standards AuditedRFC & ISO compliant
Peer ReviewedEditorial Policy
Documentation & Guide

How to Use HTTP Header Security Auditor

1

Paste Raw HTTP Headers

Copy and paste raw response or request headers from browser DevTools, cURL, or pick a sample preset.

2

Review Security Grade & Posture Score

Inspect the calculated score (0-100) and letter grade (A+ to F) derived from OWASP secure headers standards.

3

Analyze Audit Checklist

Review findings for Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, Permissions-Policy, and Server banner leaks.

4

Export Server Hardening Directives

Switch to the Server Hardening tab to copy production-ready config snippets for Nginx, Apache (.htaccess), Cloudflare, or Caddy.

Practical Examples & Conversions

Input
Content-Security-Policy: default-src 'self' | Strict-Transport-Security: max-age=63072000 | X-Frame-Options: DENY
Output
Security Score: 95/100 (Grade A+) — All 6 Core OWASP Headers Enforced

Frequently Asked Questions (PAA)

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Authoritative Standards & Citations

Calculations and algorithms on this page are implemented and verified in strict accordance with the following official technical specifications:

IETF (Internet Engineering Task Force)

RFC 7519: JSON Web Token (JWT)

Standardized compact, URL-safe means of representing claims to be transferred between two parties.

W3C Recommendation

Web Cryptography API Specification

Standard JavaScript API for performing basic cryptographic operations in web applications.

IETF Standards Track

RFC 4122: A Universally Unique IDentifier (UUID) URN Namespace

Definition of uniform format and generation algorithms for UUIDs.