Free tool · Decode
Certificate Key Matcher
When cPanel or Nginx says the private key does not match, this tool finds out which file is the odd one. Everything is compared inside your browser. Your private key is never uploaded.
Paste any two or three
Compared inside your browser only. Encrypted keys are not supported; decrypt first.
Result
We hash the public key (modulus) of each file and tell you which ones belong together.
Why does my key not match my certificate?
Usually the CSR was generated twice and the certificate was issued for the first CSR while the server kept the second key. Reissue the certificate with the CSR that matches the key on your server, or ask us to reissue it for free.
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