Sign Certificate with CA

Upload your CA certificate and private key to sign a new certificate

Warning: These certificates are for development and testing purposes only.

Do not use these certificates in production environments. For production use, obtain certificates from a trusted Certificate Authority.

Certificate Authority (CA)

CA Certificate (PEM/DER) *

Click to upload or drag and drop

Accepted: .pem,.crt,.cer,.der

CA Private Key (PEM) *

Click to upload or drag and drop

Accepted: .pem,.key

CA Private Key Password (if encrypted)

💡 The CA certificate and private key will be used to sign the new certificate.

Select Preset Template

Presets automatically populate all certificate fields. You can upload custom JSON presets.

Common Name (CN) *

Domain name for server certificates, or person's name for client certificates

Organization (O)

Organizational Unit (OU)

Locality (L)

State/Province (ST)

Country (C)

2-letter country code

Email Address

Validity Period (days)

Recommended: 365 days (1 year) for server certificates

Key Type

RSA Key Size (bits)

Private Key Password (Optional)

Encrypt the private key with a password (PKCS#8)

Output Format