Encryption for
Everybody
A nonprofit providing free TLS certificates to more than 550M550M 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
We Issued Our First Six Day Cert
Hitting a milestone on our path toward optional shorter-lived certs.
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Encryption for Everybody
Celebrating ten years of Let’s Encrypt.
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Scaling Our Rate Limits to Prepare for a Billion Active Certificates
We’ve evolved our rate limits to better serve our subscribers and keep our service healthy.
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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.
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