showcert ☆
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Description:
X.509 TLS certificate reader and creator
Type: Formula  |  Latest Version: 0.4.11@0  |  Tracked Since: Dec 4, 2025
Links: Homepage  |  formulae.brew.sh
Category: Security
Tags: tls ssl certificates x509 cli security
Install: brew install showcert
About:
Showcert is a command-line utility designed to read, parse, and create X.509 TLS certificates. It provides a convenient way to inspect certificate chains directly from a server or a file, offering detailed insights into certificate validity and structure. The tool also supports generating self-signed certificates, making it useful for quick testing and development environments.
Key Features:
  • Retrieve and parse certificates from remote servers via HTTPS
  • Read and display certificate details from local PEM/DER files
  • Generate self-signed certificates for testing purposes
  • Human-readable output of certificate fields and metadata
Use Cases:
  • Debugging SSL/TLS connection issues with remote hosts
  • Verifying certificate chains and expiration dates
  • Quickly generating self-signed certificates for local development servers
Alternatives:
  • openssl – OpenSSL is a comprehensive toolkit that is more verbose; showcert offers a simpler, output-focused interface for common certificate viewing tasks.
  • curl – While curl can output server certificates, showcert is specifically tailored for parsing and displaying certificate details more clearly.
Version History
Detected Version Rev Change Commit
Dec 4, 2025 8:26pm 0 VERSION_BUMP c4717b81
Oct 12, 2025 10:26am 0 VERSION_BUMP 8de3cb7e
Sep 15, 2025 10:11am 0 VERSION_BUMP c630b33c
Dec 29, 2024 6:35pm 0 NEW acce2a66
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