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Free security tools for your website
Genuinely useful checks you can run right now — no account, no email wall, no lead-trap. Each one gives you a clear result and the exact fix. Built by the team behind Bug Circuit's human security audits.
Live
Security Headers Checker
Grade your HTTP security headers A–F and get the exact line to fix each missing one.
HSTSCSPClickjacking
Live
Email Spoofing Checker
See whether criminals can send email that looks like it came from your domain (SPF, DKIM, DMARC).
SPFDKIMDMARC
Coming soon
Is My Site Blacklisted?
Check whether your domain is flagged as unsafe or on a malware/spam blocklist.
BlocklistSafe Browsing
Looking for downloadable tools and templates instead? Those live in our free tools store. New online tools ship regularly — check back, or run the one that’s live now.
Keep reading
Security Headers CheckerGrade your headers A–F with exact fixes.Email Spoofing CheckerTest SPF, DKIM & DMARC for your domain.Free website security checkPassive recon + a human yes/no on critical bugs.Is my website hackable?The warning signs attackers look for first.Transparent pricingFree check · $49 full audit · $299 with fixes + cover.