HTTP Security Headers Checker
📦 HTTP Security Headers Checker Source Code $5.99
Get the complete, ready‑to‑deploy HTML file with all styling and logic. This is the exact code powering the demo above — no dependencies, works offline, and 100% client‑side (uses a free proxy). Perfect for security audits, monitoring, or resale. One‑time purchase, lifetime access.
What Is a Security Headers Checker?
This tool examines the HTTP response headers of any website and evaluates them against recommended security practices. It checks for critical headers like Content‑Security‑Policy (CSP), Strict‑Transport‑Security (HSTS), X‑Frame‑Options, X‑Content‑Type‑Options, Referrer‑Policy, and more. The output shows which headers are present, their values, and a simple risk score to help you quickly identify missing protections.
How to Use
- Enter a full URL (with https://) in the input field.
- Click "Check Headers" — the tool will fetch the URL via a CORS proxy and parse the response headers.
- Review the results — a list of headers with values, and a score (Good / Medium / Poor) based on the presence and configuration of key security headers.
Frequently Asked Questions
Is my data safe when I check a URL?
Yes. The request goes through a public proxy, but we do not store, log, or transmit any data beyond the single request. The tool runs entirely in your browser.
Does it work offline?
The tool itself is offline‑ready, but it requires an internet connection to fetch the target URL. The HTML can be saved and used later with an active connection.
Which headers does it check?
It checks CSP, HSTS, X‑Frame‑Options, X‑Content‑Type‑Options, Referrer‑Policy, Permissions‑Policy, and several others. The score is based on the presence and strength of these headers.
Disclaimer: This tool performs all operations locally in your browser. No data is stored, transmitted, or logged. The proxy service is used only to retrieve headers; we do not control its logging policies.