Certificate Key Matcher

Quickly verify the authenticity of your digital certificates and private keys. Our "Certificate Key Matcher" tool instantly compares key pairs and CSRs to ensure they match perfectly.

Why use Certificate Key Matcher of SSL4Free?

- Prevent unauthorized access
- Detect compromised keys
- Streamline certificate management

How it works?

- Easily upload your certificate and private key
- Our system performs a cryptographic hash comparison
- Immediate results: match or mismatch

Need more control?

Use OpenSSL commands for manual verification:

openssl pkey -in privateKey.key -pubout -outform pem | sha256sum openssl x509 -in certificate.crt -pubkey -noout -outform pem | sha256sum openssl req -in CSR.csr -pubkey -noout -outform pem | sha256sum

Protect your sensitive data. While we employ robust security measures, always prioritize local key verification.

What to Check

Check if a Certificate and a Private Key match

Check if a CSR and a Certificate match

Results will be displayed here after both boxes are filled.

Enter your Certificate:

Enter your Private Key:

Your private key is intended to remain on the server. While we try to make this process as secure as possible by using SSL to encrypt the key when it is sent to the server, for complete security, we recommend that you manually check the public key hash of the private key on your server using the OpenSSL commands above.