Encryption for
Everybody

A nonprofit providing free TLS certificates to more than 550M websites.


 

Explore our work to improve security and privacy

Our 2024 Annual Report highlights the progress we've made toward a better Internet.

Free, Automated TLS Certificates

Getting started

Let's Encrypt is a Certificate Authority that provides free TLS certificates, making it easy for websites to enable HTTPS encryption and create a more secure Internet for everyone. Let's Encrypt is a project of the nonprofit Internet Security Research Group.

Start securing your websites with free SSL/TLS certificates from Let's Encrypt. In order to get a certificate for your website's domain, you have to demonstrate control over the domain.

Let's Get Started →

Global impact made possible by generosity

Leading Through Sponsorship

Companies who rely on or value our work to encrypt the Web can financially support Let's Encrypt. Join companies big and small to make this work possible!

Let's Encrypt Growth

More ways we're improving security and privacy

Did you know Let's Encrypt has two sibling projects? Let's Encrypt and these two projects are operated by Internet Security Research Group (ISRG), a 501(c)(3) public benefit organization focused on making the Internet more secure and privacy respecting.