Website security
Inspect certificates, response policies and the links you are about to trust.
A tool for each question.
12 focused tools. Choose a module and follow the evidence.
TLS & HTTPS
Inspect certificate trust and understand Strict-Transport-Security settings.
Headers, cookies & policies
Read response headers and examine CSP, cookies, CORS, referrer and permission policies.
HTTP security headers
Inspect a live response for HSTS, CSP, framing rules and other browser security policies.
Content Security Policy audit
Parse a pasted CSP, inspect effective fallbacks and identify permissive script policies.
Cookie security audit
Check pasted Set-Cookie headers for Secure, HttpOnly, SameSite and cookie prefix rules.
Referrer-Policy analyser
Identify the effective recognised Referrer-Policy token and explain its cross-origin behavior.
Permissions-Policy analyser
Read feature allowlists from a pasted Permissions-Policy response header.
CORS header analyser
Inspect pasted Access-Control response headers for wildcard, credential and cache pitfalls.
URLs & web integrity
Inspect links, encode URL components, generate SRI values and review security.txt.
Suspicious URL inspector
Reveal misleading authority, punycode, tracking parameters and encoded URL components.
URL component encoder
Encode or decode a UTF-8 URL component with strict percent-escape validation.
Subresource integrity generator
Create a SHA-256, SHA-384 or SHA-512 integrity token from a local JavaScript or CSS file.
security.txt validator
Review pasted security.txt fields, expiry and disclosure contact information.
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