CSR Generator
Generate a Certificate Signing Request and private key in your browser. Your private key never leaves your device.
What is a CSR Generator?
A Certificate Signing Request (CSR) is a block of encoded text submitted to a Certificate Authority (CA) when applying for an SSL/TLS certificate. It contains your public key and identifying information (domain, organization, location).
This tool generates both the CSR and a matching RSA private key entirely in your browser using the Web Crypto API. Nothing is transmitted — your private key never leaves your device.
How to use
- Fill in the Common Name (your domain) and optional organization details
- Choose a key size (2048 is standard, 4096 for higher security)
- Click Generate — the CSR and private key appear instantly
- Submit the CSR to your CA and store the private key securely on your server
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