certbot/certbot

Analysis updated 2026-06-20

★ 33,021PythonAudience · ops devopsComplexity · 2/5Setup · moderate

Mindmap

mindmap
  root((Certbot))
    What it does
      Free HTTPS certs
      Auto server config
      Auto renewal
    Certificate Sources
      Let's Encrypt
      Any ACME server
    Verification Methods
      HTTP challenge
      DNS challenge
    Use Cases
      Nginx setup
      Apache setup
      Wildcard certs
    Setup
      Python CLI tool
      Linux server
      Single command

mindmap root((Certbot)) What it does Free HTTPS certs Auto server config Auto renewal Certificate Sources Let's Encrypt Any ACME server Verification Methods HTTP challenge DNS challenge Use Cases Nginx setup Apache setup Wildcard certs Setup Python CLI tool Linux server Single command

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What do people build with it?

USE CASE 1

Automatically obtain and install a free HTTPS certificate on an Nginx or Apache server with a single command

USE CASE 2

Set up automatic certificate renewal so your site never shows a security warning due to an expired certificate

USE CASE 3

Get a wildcard certificate for all subdomains of your domain from Let's Encrypt

USE CASE 4

Add HTTPS to a self-hosted web app running on a Linux server without paying for a certificate

What is it built with?

Python

How does it compare?

	certbot/certbot	openbmb/chatdev	kovidgoyal/kitty
Stars	33,021	33,009	32,789
Language	Python	Python	Python
Setup difficulty	moderate	moderate	easy
Complexity	2/5	4/5	2/5
Audience	ops devops	developer	developer

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · moderate Time to first run · 30min

Requires a publicly accessible server with DNS pointing to it so Let's Encrypt can verify domain ownership via the HTTP challenge.

In plain English

Certbot is a command-line tool from the EFF that automates obtaining HTTPS certificates and optionally configuring your server to use them. Normally, setting up HTTPS, the secure connection that shows a padlock in your browser, requires manually requesting a certificate from a certificate authority and updating your server settings. Certbot handles both steps: it communicates with Let's Encrypt or any other certificate authority that supports the ACME protocol to get a valid certificate, and can configure your server to use it automatically. Written in Python, it is designed to make HTTPS setup as simple as running a single command, removing the manual steps that often make secure web hosting difficult for non-experts. The README does not provide further detail about its features, architecture, supported platforms, or use cases, so a complete explanation is not possible from the provided data alone.

Copy-paste prompts

Prompt 1

How do I use Certbot to get a free HTTPS certificate for my Nginx server on Ubuntu and auto-configure Nginx to use it?

Prompt 2

Set up Certbot with a cron job or systemd timer to automatically renew my Let's Encrypt certificate before it expires

Prompt 3

I need a wildcard certificate for *.mydomain.com, how do I use Certbot with the DNS challenge to get one from Let's Encrypt?

Prompt 4

My Certbot renewal is failing with a challenge error, how do I debug what's going wrong?

Prompt 5

How do I use Certbot in standalone mode to get a certificate when I don't have a web server running yet?

Frequently asked questions

What is certbot?

A command-line tool from the EFF that automatically gets free HTTPS certificates from Let's Encrypt and configures your web server to use them, replacing a previously complex manual process with a single command.

What language is certbot written in?

Mainly Python. The stack also includes Python.

How hard is certbot to set up?

Setup difficulty is rated moderate, with roughly 30min to a first successful run.

Who is certbot for?

Mainly ops devops.

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