DomainOpsFree domain tools
Three free tools that let you check domains, email authentication, and subdomain exposure in seconds — no signup required to try.
Bulk WHOIS Checker
Check expiry, registrar, and renewal status across up to 100 domains.
- •Up to 100 domains in one go
- •Sortable, exportable results
- •No signup required
Email Authentication Audit
Audit SPF, DKIM, and DMARC across up to 50 domains.
- •Portfolio-level grading
- •Per-domain breakdown
- •No signup required
Subdomain Takeover Scanner
Discover and test subdomains for dangling references on 13 cloud providers.
- •Certificate Transparency + DNS brute-force
- •13 providers (S3, GitHub Pages, Vercel, …)
- •No signup required
All these tools are part of DomainOps — sign up to monitor continuously.
See pricing