What Security Headers Checker does
Inspect common defensive HTTP response headers for a public URL. The tool keeps the operation focused and creates a separate result so the original remains available for comparison.
Security Headers Checker uses a bounded server request with explicit input, time, output, and rate limits.
How to use Security Headers Checker
For a predictable Security Headers Checker result, keep the source available, test the smallest useful example first, and confirm the downloaded or displayed output independently.
- Provide only the text, file, certificate, password-derived input, or public target required for the focused check.
- Review the selected algorithm, parsing rule, network scope, or policy option before running the analysis.
- Read each finding with its evidence and limitations instead of treating a single score or status as proof.
- Confirm important results through an authoritative source or approved security process before taking action.
Where Security Headers Checker fits
Use this security workflow for a narrow verification task or an initial diagnostic. Save the relevant input and result, compare it with an authoritative source, and involve the system owner before applying changes to authentication, certificates, headers, policies, or production data.
What to check
Review both missing and present values at the final public URL. Header presence alone does not prove an effective policy or application security.
Treat the result as a focused diagnostic, not a security guarantee. Confirm findings with current browser behavior, authoritative documentation, and an approved scanner before changing a production system.
Privacy and limitations
PagesTools requests only the submitted public URL through an SSRF-protected checker and does not submit page content to another analysis service.
A focused browser or network check sees only the submitted material and the signals it is designed to inspect. It cannot certify identity, remove malware, prove a site is safe, replace a penetration test, or predict every attack technique.