acme.sh ☆

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Description:
ACME client

Type: Formula | Latest Version: 3.1.2@0 | Tracked Since: Dec 17, 2025

Links: Homepage | formulae.brew.sh

Category: Security

Tags: ssl tls letsencrypt security automation certificates

Install: brew install acme.sh

About:
acme.sh is a command-line tool that implements the ACME protocol to issue and renew TLS/SSL certificates automatically. It provides a lightweight and robust alternative to Certbot, supporting a wide range of DNS APIs for DNS-01 challenges. This enables fully automated certificate management for web servers without requiring public web root access.

Key Features:

Zero dependencies and lightweight implementation
Supports over 300 DNS providers via API
Automatic certificate renewal with cron jobs
Wildcard certificate support
Compatible with Let's Encrypt and other ACME CAs

Use Cases:

Automating SSL certificate issuance for Nginx or Apache web servers
Securing internal services with trusted certificates via DNS challenges
Managing wildcard certificates for multi-subdomain environments

Alternatives:

Certbot – More feature-rich with web server plugins but heavier and requires root privileges for Apache/Nginx integration.
ZeroSSL – Web-based GUI tool, better for users who prefer a visual interface over CLI automation.

License: GPL-3.0-only

Bottles available for: all

Version History

Detected	Version	Rev	Change	Commit
Sep 13, 2025 9:19am		0	VERSION_BUMP	1848ff27