Encryption for
Everybody
A nonprofit providing free TLS certificates to more than 700M700M websites.
Explore our work to improve security and privacy
Our 2024 Annual Report highlights the progress we've made toward a better Internet.
From our blog
Ten Years of Community Support
In its first decade, the Let’s Encrypt Community Forum has helped tens of thousands of users, kept Let’s Encrypt staff in touch with the community, and spurred new tools and projects.
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ACME Renewal Information (ARI) Published as RFC 9773
Our renewal advisory specification was published by the IETF.
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Native ACME Support Comes to NGINX
The most-used web server and reverse proxy gives users a new certificate option.
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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
Support Encryption for Everybody
Your donation helps keep Let's Encrypt free and accessible to millions of websites around the world. Join us in securing the Internet, one site at a time. Every contribution makes a difference, whether you're an individual or a company.
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!
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.