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testssl.shCertificate Ripper
Free

Free and open source.

 Free

Free and open source under the Apache 2.0 licence.

macOS, Linux, Command line Windows, macOS, Linux, Command line
  • Tests any port, not only HTTPS on 443
  • Checks protocols, ciphers and known cryptographic flaws
  • No OpenSSL required
  • Bulk extraction from many URLs at once
  • Command-line output takes some TLS knowledge to interpret
  • Intended for authorized testing of servers you run or may test
  • Command-line only, with no graphical interface
  • Focused on extraction rather than full TLS configuration testing
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0 License: Apache-2.0
No account needed No account needed
Needs internet Needs internet

Checked September 23, 2026

Checked October 2, 2026

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