Key matcher
Confirms a private key's public component matches the public key in a certificate or CSR — useful when you're not sure which key belongs with which cert.
What is Key matcher?
When managing multiple certificates and keys, it's easy to lose track of which private key actually belongs with which certificate — mismatching them breaks TLS entirely, so it's worth confirming before deploying.
How to use it
Paste a private key and a certificate or CSR — the tool compares their public key components directly (real cryptographic comparison, not just a file-name guess).
Example
A matching key and certificate report: Match — this key belongs with this certificate/CSR.