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SSH Key, Certificate & known_hosts Inspector

Inspect authorized_keys, known_hosts, RFC 4716, OpenSSH/PEM keys and OpenSSH certificates locally with fingerprints, validity and comparison.

Private-key-safe local inspection
Only the public component is derived from private input for fingerprints and matching.
Up to 5 MB and 100 public objects.
Syntax checks do not contact hosts, prove ownership or confirm server authorization.

About SSH Key, Certificate & known_hosts Inspector

Decode SSH identities without exposing private material. Inspect authorized_keys, known_hosts, RFC 4716, OpenSSH/PEM keys and OpenSSH certificates locally with fingerprints, validity and comparison. The core workflow is designed to run in your current browser.

Key capabilities

  • Parse authorized_keys, known_hosts, RFC 4716, OpenSSH and PEM
  • Calculate OpenSSH SHA256 and MD5 public fingerprints
  • Decode serial, type, principals, validity, extensions and CA key
  • Compare public identities while suppressing private parameters

Useful for

  • Inventory SSH access keys
  • Compare host keys during rotation
  • Review OpenSSH certificate constraints and expiry

Frequently asked questions

Is SSH Key, Certificate & known_hosts Inspector free to use online?

Yes. SSH Key, Certificate & known_hosts Inspector opens in a modern browser and does not require desktop software installation.

What is SSH Key, Certificate & known_hosts Inspector useful for?

Common use cases include Inventory SSH access keys; Compare host keys during rotation.

Is my input or file uploaded?

The core processing workflow is designed to run locally in the browser. Key capabilities include Parse authorized_keys, known_hosts, RFC 4716, OpenSSH and PEM, Calculate OpenSSH SHA256 and MD5 public fingerprints, Decode serial, type, principals, validity, extensions and CA key; account, comments, and anonymous analytics may still create normal site requests.

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