CSR Generator

Create a CSR and Private Key securely inside your browser. Nothing is uploaded to any server.

CSR Details

The primary domain (required). For wildcard use *.example.com in SAN.
Optional. Comma-separated. Supports wildcards. If left empty CSR will contain only CN.
Note: Everything happens in your browser. Private key never leaves your device unless you download or copy it.
Private Key
CSR (Certificate Signing Request)
Entropy: —

How to use

  1. Enter CN and optional SANs (comma separated). For wildcard use *.example.com in SAN.
  2. Choose key type and size. Click Generate.
  3. Save private key securely. Upload CSR to your Certificate Authority to get a signed certificate.

About This CSR Generator

This CSR Generator allows you to create Certificate Signing Requests and Private Keys entirely inside your browser. No information is uploaded, ensuring maximum privacy and security for SSL certificates, HTTPS websites, and domain validation.

Supported Key Types

  • RSA – 2048 / 4096 bit
  • ECC – P-256 and P-384 curves

What You Can Generate

  • CSR (Certificate Signing Request)
  • RSA or ECC Private Key
  • ZIP archive containing CSR and private key
  • CSR with SAN (Subject Alternative Names)

Use Cases

  • SSL Certificates (DV / OV / EV)
  • Wildcard certificates
  • Multi-domain / SAN certificates
  • HTTPS for websites, servers, APIs
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Frequently Asked Questions

Yes. All key generation happens locally in your browser. Nothing is uploaded or stored on any server.

No. Your private key never leaves your device. You are the only one who can download or copy it.

Yes. You can generate wildcard (e.g., *.example.com) and SAN (multiple domain) CSRs easily.

Supported types: RSA 2048/4096 and ECC P-256 / P-384 curves.
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Security Tips
  • Never share your private key.
  • Store private keys offline or in a secure vault.
  • Use DNS-01 validation for wildcard certificates.