Self-Signed Certificate Generator
Generate self-signed SSL/TLS certificates with RSA or ECDSA keys, multi-domain and IP SANs, custom validity, and one-click download of the certificate and private key. Great for local development and intranet HTTPS.
Processed server-side
Real-time
Certificate details
Key algorithm
Certificate & key
Fill in the details and hit Generate
Keep the private key on your server only — never commit it or share it. This tool generates it in server memory and stores nothing.
Certificate
Private key
About this tool
Generate self-signed SSL/TLS certificates with RSA or ECDSA keys, multi-domain and IP SANs, custom validity, and one-click download of the certificate and private key. Great for local development and intranet HTTPS.
How to use
- Fill in the input box above, or click "Fill sample" to try it instantly
- Adjust the options as needed — results update as you type
- Click "Run" to get the result, then copy or export it in one click
Tips
- Processed on the server; uploaded files are deleted immediately afterwards and never retained
- Completely free, no registration, no usage limits