Subdomain Enumeration

• Free online subdomain enumeration tool
• Quickly discover all subdomains of a target domain by querying Certificate Transparency logs (CRT.sh)
• Supports exporting results as CSV/TXT and one-click copy for security assessment and asset discovery

1. Open the tool page — no download or installation needed
2. Enter the target root domain (without www) and choose a scan mode: Standard, Deep, or Both
3. Click "Start Enumeration" to run the query; once results appear, use "Copy All" or copy a single row, or export as CSV/TXT

• This tool is completely free and requires no sign-up
• It discovers subdomains by querying public Certificate Transparency logs (CRT.sh); results are for reference only

Free online subdomain enumeration tool. Quickly discover all subdomains of a target domain based on Certificate Transparency logs (CRT.sh). Supports exporting results and one-click copy for security assessment and asset discovery.

Open the tool page — no download or installation needed Enter the target root domain (without www) and choose a scan mode: Standard, Deep, or Both Click "Start Enumeration" to run the query; once results appear, use "Copy All" or copy a single row, or export as CSV/TXT

This tool is completely free and requires no sign-up It discovers subdomains by querying public Certificate Transparency logs (CRT.sh); results are for reference only

Yes, Subdomain Enumeration is completely free. No download or installation required — it runs right in your browser.