SSL Certificate Generator
Generate free self-signed SSL/TLS certificates instantly for development and testing. Create RSA or ECDSA certificates with Subject Alternative Names (SAN).
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What is SSL Certificate Generator?
Certificate Generator allows you to create self-signed SSL/TLS certificates and private keys for local development servers and testing environments.
Key Benefits
- Dev environment
- No cost
- Full control
- Immediate issuance
Common Use Cases
- •Local HTTPS
- •Testing APIs
- •Internal tools
- •Learning SSL
How to Generate Self-Signed Cert
- Details: Enter Common Name (e.g. localhost) and validity.
- Generate: Click create certificate.
- Download: Download cert (.crt) and key (.key) files.
Key Features
- Generate self-signed SSL certificates
- Custom subject information (CN, O, OU)
- Key size selection (2048, 4096 bits)
- Validity period configuration
- Download certificate and private key
- PEM format output
Frequently Asked Questions
Is this a real SSL cert?
It is a self-signed certificate, useful for development/testing but not trusted by public browsers.
Why does browser warn me?
Because the certificate isn't issued by a recognized Certificate Authority (CA).
Can I use for production?
No, for production you typically need a certificate from a trusted CA like Let's Encrypt.