Comprehensive HTTP security header audit with scoring. Check CSP, HSTS, X-Frame-Options, and more.
Paste raw HTTP response headers or fetch from a URL to get a graded security audit. The tool checks CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and other security headers, with a score from A+ to F and actionable remediation. Runs in your browser.
Paste raw HTTP response headers or fetch from a URL to get a graded security audit. The tool checks CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, and other security headers, with a score from A+ to F and actionable remediation. Runs in your browser. The tool runs entirely in your browser — your data stays on your device and is never transmitted to any server, making it safe for production data and sensitive credentials. Common search terms like security headers, HTTP headers audit, CSP all lead to this tool because it addresses the specific need for browser-based inspection in the Security ecosystem. The Security ecosystem includes related tools for formatting, validation, conversion, and more. Each tool handles a specific operation, and Security Headers Analyzer focuses specifically on inspection — doing one thing well rather than trying to be a general-purpose Swiss Army knife.
Using Security Headers Analyzer takes just a few seconds — there is no signup, no download, and no configuration required. 1. Enter the data you want to inspect into the input area. 2. The tool analyzes the input and displays detailed information about its structure and contents. 3. Review the metadata, components, and any issues detected by the inspection. 4. Expand sections for deeper analysis of specific parts. 5. Use the findings to debug issues, verify configurations, or understand unfamiliar data formats. All processing happens in your browser, so your data never leaves your device. The tool works on any modern browser (Chrome, Firefox, Safari, Edge) on desktop and mobile.
Security engineers and penetration testers use security headers analyzer for analyzing security-related data during audits and incident investigations. Developers across all experience levels use security headers analyzer for quick inspection tasks that would otherwise require writing a one-off script or installing a cli tool. Technical writers and documentation authors use security headers analyzer to prepare accurate security examples for tutorials, api docs, and developer guides.
Reach for Security Headers Analyzer when you need to security headers; when you need to http headers audit; when you need to hsts. It eliminates the overhead of writing throwaway scripts or installing CLI tools for quick inspection tasks. Developers who work with Security data daily keep this tool bookmarked for instant access. The immediate feedback loop — paste data, see results, copy output — fits naturally into debugging sessions, code reviews, and rapid prototyping workflows where context-switching to a terminal or writing utility code would break your concentration.
To get the most out of Security Headers Analyzer, it helps to understand how inspection works at a technical level. When working with security headers, keep these details in mind. Cookie security inspection checks the Secure flag (HTTPS only), HttpOnly flag (no JavaScript access), SameSite attribute (cross-site request protection), and appropriate expiration. TLS certificate inspection shows the certificate chain (root CA → intermediate → leaf), expiration date, Subject Alternative Names (SANs), key algorithm (RSA vs. ECDSA), and key size. Security inspection analyzes HTTP response headers for vulnerabilities: missing Content-Security-Policy (XSS risk), missing Strict-Transport-Security (downgrade attack risk), and permissive CORS (data theft risk).
Avoid these common issues when using Security Headers Analyzer: When searching for 'security headers', make sure you are using the right tool variant. Different Security operations (formatting, validation, conversion) solve different problems — using the wrong tool leads to unexpected results. Copy-pasting from word processors or rich text editors may introduce invisible characters (zero-width spaces, smart quotes, non-breaking spaces) that cause parsing failures. Use a plain text editor to prepare input. Character encoding matters: if your input contains non-ASCII characters (accented letters, emoji, CJK characters), make sure the encoding is consistent. UTF-8 is the standard for web content. Ensure your input is in the correct format before using Security Headers Analyzer. The tool expects valid Security input — submitting data in the wrong format produces confusing errors.
Using Security Headers Analyzer in your browser instead of a local CLI tool or library has distinct advantages for inspection tasks. Convenience is the primary benefit: open a browser tab, paste your data, and get results in seconds. No installation, no dependency management, no version conflicts, and no PATH configuration. The tool works identically on macOS, Windows, Linux, and ChromeOS. For inspection tasks, the visual interface is essential. Color-coded highlights, expandable tree views, and side-by-side layouts provide information density that terminal output cannot match. You can click, scroll, and interact with the results rather than piping text through pagers. Whether you found Security Headers Analyzer by searching for security headers or HTTP headers audit, the browser-based approach means you can start using it immediately — no signup, no API key, no rate limits, and no usage tracking.
Access-Control-Allow-Origin: https://example.com
Access-Control-Allow-Methods: GET, POST, OPTIONS
Access-Control-Allow-Headers: Content-Type, AuthorizationPaste this into Security Headers Analyzer to see it processed instantly. This example represents a common inspection scenario that you would encounter when working with Security data in real projects. Try modifying the input to explore how Security Headers Analyzer handles edge cases like empty values, special characters, and deeply nested structures.
CSP, Strict-Transport-Security (HSTS), X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, COOP, COEP, CORP, and deprecated headers like X-XSS-Protection.
Yes. Copy the full response headers from DevTools or a curl response and paste them into the tool for instant scoring.