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Free website security tools
Quick, single-purpose checks you can run on any site in seconds. They only read what your server already makes public, and the DNS tools run in your browser. Each result comes with a plain-English fix.
- Free security headers check
Grade HTTPS, security headers, cookies, SPF and DMARC from A to F, with copy-paste fixes for your host.
- CSP generator
Build a Content-Security-Policy header in a minute.
- HSTS checker
Free HSTS checker: read your Strict-Transport-Security header, max-age, includeSubDomains and preload, test the http to https redirect and see your hstspreload.org status..
- SPF record checker
Free SPF record checker.
- DMARC checker
Free DMARC record checker.