ZeroSSL
ZeroSSL issues online SSL certificates and supports HTTPS setup through a certificate management interface.
About ZeroSSL
ZeroSSL issues SSL certificates and provides tools for setting up and managing HTTPS on websites, domains and backend systems. Certificates can be validated through one-step email validation, server uploads or CNAME verification. Renewal can be automated through ACME client integrations or the REST API. The homepage describes free 90-day certificates. It also lists annual and wildcard certificates, but does not state their pricing.
Key features
- Free 90-day SSL certificates with automated renewal
- Annual and wildcard certificate options
- One-step email, server upload or CNAME domain validation
- ACME integrations for managing and renewing existing certificates
- REST API for certificate issuance and CSR validation
- Installation checks and SSL monitoring
Best for: Website operators and developers who want to automate SSL certificate issuance and renewal.
Good for
- Offers several validation methods, including email, server upload and CNAME verification
- Provides both ACME integrations and a REST API for automation
- Includes installation checks and SSL monitoring
Watch out for
- Free certificates are issued for 90 days, so they must be renewed
- The homepage does not state pricing for annual or wildcard certificates
ZeroSSL at a glance
- Website
- zerossl.com
- Category
- Privacy & Security › Security Tools
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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ZeroSSL FAQ
How can a domain be validated for a certificate?
The homepage lists one-step email validation, server uploads and CNAME verification.
Can certificate issuance and renewal be automated?
Yes. The homepage describes ACME client integrations and a REST API that support issuance, CSR validation and renewal.
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