Private Key Inspector

Inspect and extract information from RSA private keys in your browser. You can also extract and convert the associated public key.


Private and secure: Your keys never leave your device !


  • Accepts RSA keys in PEM / DER (Base64 or Hex)
  • Inspects key length and exponent
  • Extracts public key in:
    • PEM
    • DER (Base64)
    • DER (Hex)
  • Converts between:
    • PKCS#1 (RSA PRIVATE KEY)
    • PKCS#8 (PRIVATE KEY)

Paste your private key below.


Public Key Output Format:

Inspect Key Extract Public Key Reset