Online Tools

PEM Key Parser

Paste a PEM-encoded key or certificate and inspect algorithm, key size, and OIDs.

Key Details

Key details will appear here.

Step by step

How to use PEM Key Parser

  1. 1

    Paste a PEM-encoded public key, private-key wrapper, certificate, or signing key.

  2. 2

    Parse the envelope and inspect detected algorithms, identifiers, key size, and curve information.

  3. 3

    Use the decoded metadata to diagnose key compatibility without exposing the material to a server.

Capabilities

What this tool handles

  • RSA and EC key detection
  • OID decoding with named algorithms
  • Key size and curve identification

Common uses for PEM Key Parser

  • Check whether a key is RSA or elliptic-curve before configuring an integration.
  • Inspect OIDs and key sizes while debugging TLS, JWT, or signing setup.

What to check before using the result

Metadata parsing does not prove that a certificate is trusted, unexpired, correctly chained, or matched to a private key.

Privacy and accuracy

Questions about PEM Key Parser

Does this tool upload my input?

The conversion or analysis runs in your browser. The application does not intentionally send the value you enter to a processing API. Standard hosting infrastructure can still receive request metadata when the page loads; see the privacy page for details.

Can I rely on the output without checking it?

Use the result as a focused development aid and verify it in the system where it will be used. Test representative edge cases and confirm the destination uses the same format, standard, and assumptions described on this page.

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