Let's Encrypt
FeaturedFree SSL/TLS Certificates
About Let's Encrypt
Let’s Encrypt is a nonprofit certificate authority that provides free TLS certificates to more than 700 million websites. It enables website operators to enable HTTPS encryption with automated issuance and broad accessibility.
Key Features
Key capabilities include automated certificate issuance and broad ecosystem support:
Free TLS Certificates
issuance of publicly trusted certificates at no cost for domains.
ACME Automation
automated issuance and renewal through ACME-compatible clients to minimize manual steps.
Documentation & Client Ecosystem
extensive documentation and a selection of recommended ACME clients to simplify integration.
Nonprofit Governance & Transparency
ISRG-operated organization with public reporting and sponsorships to maintain trust.
Summary
By providing free, automated TLS certificates at scale, Letsencrypt reduces the operational friction of enabling HTTPS for websites and improves security across the Internet. The nonprofit governance model and open ecosystem differentiate the service from traditional certificate authorities by aligning incentives with security and user privacy, offering transparency through reports and sponsorships, and supporting a broad set of clients and platforms.
