About ZeroSSL
ZeroSSL is a certificate provider that issues SSL certificates for websites and backend systems. It supports the ACME protocol, so tools can request and renew certificates automatically.
What it does
You can issue free 90-day certificates and renew them without manual steps. Validation can be done by one-step email, a server upload or a CNAME record. The REST API covers certificate issuance and CSR validation, and the site also offers installation checks and SSL monitoring.
Key features
- Free 90-day certificates with renewal via ACME
- One-step email, server upload or CNAME validation
- REST API for issuing and managing certificates
- Wildcard and annual certificates listed on the site
- Installation checks and SSL monitoring
Who it's for
ZeroSSL suits website owners who need HTTPS and developers who want certificates issued through scripts. It is a fit for teams that already use ACME clients or want to automate certificate management with the API.
Pricing and good to know
Free 90-day certificates are offered, and the site lists annual and wildcard certificates as paid options. A developer pricing page and a partner program are also listed. Validation can be done by email, server upload or CNAME record, as the site describes.
Highlights
- Free 90-day certificates with renewal via ACME
- One-step email, server upload or CNAME validation
- REST API for issuing and managing certificates
- Wildcard and annual certificates listed on the site
- Installation checks and SSL monitoring
