Acme-tiny
lastmod 2026-11-10created 2021-09-112 edits
acme-tiny is a small Python script that issues and renews TLS certificates from Let's Encrypt. It implements only HTTP-01 validation of the ACME protocol, so its code is short, around 200 lines, and easy to audit; it takes an account key and a CSR and writes the signed certificate to standard output. Because it can run without touching the web server configuration and without root privileges, it is used instead of automation tools like Certbot when you want minimal dependencies.
A tiny script to issue and renew TLS certs from Let's Encrypt