mkcert Zero-Config Local Development TLS Certificate Generator

mkcert is a zero-configuration CLI tool by Filippo Valsorda that creates locally-trusted development certificates. It automatically installs a local CA in the system root store and generates TLS certificates for localhost, custom domains, and IP addresses without manual PKI management.

Installation

Use the upstream install or setup path that matches your environment:

• brew install mkcert
• brew install nss # if you use Firefox
• git clone https://github.com/FiloSottile/mkcert && cd mkcert

Requirements and caveats from upstream:

• mkcert is a simple tool for making locally-trusted development certificates. It requires no configuration.
• The local CA is now installed in the Firefox trust store (requires browser restart)! 🦊
• or build from source (requires Go 1.13+)

Basic usage or getting-started notes:

• $ mkcert example.com "*.example.com" example.test localhost 127.0.0.1 ::1

• "example.com"

• "*.example.com"

• Source: https://github.com/FiloSottile/mkcert

• Extracted from upstream docs: https://raw.githubusercontent.com/FiloSottile/mkcert/HEAD/README.md

Source

• Agent Skill Exchange