PidChecker.net

Fast bulk validation of Microsoft product keys via a secure web service.

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What is this tool?

Purpose. This tool lets you paste Microsoft product keys (e.g., for Windows, Office, Visio, or Project) and quickly check what they belong to — such as the product family, product name, edition, and channel — and whether the key format looks valid.

  • Easy to use: paste one or more keys, click Start, get results.
  • Informational results: displays product family, product name, edition, channel and (where applicable) remaining MAK activations.
  • Privacy-first: keys are processed only for the purpose of this check. We do not display server details; operational logs use anonymized key prefixes.
  • No activation: this is not a licensing or activation service and does not contact external vendors for activation. Results are for guidance only.

Note: If a key cannot be classified, it may be invalid, unsupported, or outside the available datasets. This tool does not confirm purchase entitlement.

Elapsed: –:–Avg/Key:
# Key Family Product Edition Channel Remaining Status