Subfinder is a subdomain discovery tool designed for speed and efficiency. It passively enumerates subdomains by querying various online sources, making it ideal for reconnaissance in bug bounty and penetration testing scenarios.
Key features include:
- Fast and powerful resolution.
- Curated passive sources.
- Multiple output formats (JSON, file, stdout).
- Optimized for speed and low resource usage.
- STDIN/OUT support for workflow integration.
Subfinder is a valuable asset for security professionals seeking to expand their attack surface mapping with minimal footprint.