Detects subdomain takeover vulnerabilities in seconds ā free, no login required.
Forgot to remove a DNS record after leaving Heroku, Vercel, or AWS? An attacker can claim that subdomain. SubdomainChecker follows the full CNAME chain and fingerprints 100+ services to tell you if you're at risk.
ā No data stored, no logging
ā Bulk check up to 10 subdomains
ā Open source
