Encryption for
Everybody

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.

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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.

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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!

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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.