Let's Encrypt
Let’s Encrypt is a nonprofit that provides automated TLS certificates for securing websites with HTTPS.
About Let's Encrypt
Let's Encrypt is a Certificate Authority operated as a project of the nonprofit Internet Security Research Group. It provides free TLS certificates to enable HTTPS encryption on websites. To obtain a certificate, an applicant must demonstrate control over the domain, and certificates can be managed automatically with recommended ACME clients.
Key features
- Provides free TLS certificates to enable HTTPS on websites
- Automated certificate management using recommended ACME clients
- Issues certificates after applicant demonstrates domain control
- Community forum with experts, volunteers and ISRG staff
Best for: Website owners who need free TLS certificates to enable HTTPS on their domains.
Good for
- Provides TLS certificates described as free
- Supports automated management through ACME clients
- Operated by the nonprofit Internet Security Research Group
Watch out for
- Requires demonstration of domain control to obtain a certificate
- Notes a move to 64-day certificate lifetimes in February 2027
Let's Encrypt at a glance
- Website
- letsencrypt.org
- Category
- Privacy & Security › Security Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Let's Encrypt FAQ
What is required to get a certificate?
You must demonstrate control over the website's domain.
How are certificates managed?
They can be managed automatically using a recommended ACME client.
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