Extract public key
certificate = -----BEGIN CERTIFICATE-----\nMIIB...\n-----END CERTIFICATE-----
Result: Public key extracted in PEM format.
Public Key Extractor
Paste a PEM or DER certificate to extract its public key in PEM format. Shows key algorithm, size, and fingerprint.
Enter your values and press Calculate — the result appears here.
Worked examples
Frequently asked questions
Can I extract the private key?
No. A certificate only contains the public key. The private key is stored separately and should never be shared.
What can I do with the extracted public key?
Use it to verify signatures, encrypt data for the certificate holder, or configure SSH/TLS key pinning.
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