SSLPin CLI

A lightweight CLI tool that inspects an HTTPS host, reads its TLS certificate chain, and prints fingerprints and SPKI pins locally.

Features

• SHA1 & SHA256 fingerprints
• SPKI pins (Base64/Hex)
• Certificate validity & expiration
• Issuer, subject, serial number
• TLS connection details

Installation

# one-off
npx sslpin google.com

# global install
npm install -g sslpin

Usage

sslpin google.com
sslpin google.com --json
sslpin https://example.com --leaf-only
sslpin example.com --copy spki

Options

Supports bare domains and HTTPS URLs. Use --help for the full list.

• -v, --version: Show version
• --json: Output in JSON format
• --leaf-only: Show only the leaf certificate
• --copy <field>: Copy spki, sha256, or pem
• -h, --help: Show help

Development

yarn build
node packages/cli/bin/sslpin google.com

The published CLI is sslpin only. packages/core stays as an internal workspace package and is bundled into the CLI build.

Contributing

We welcome contributions! Please see our Contributing Guide for details.

License

Licensed under the MIT License - see the LICENSE file for details.