~/tools $ ./epoch

Timestamp Converter

Convert Unix seconds, milliseconds, ISO dates, and Windows FILETIME or AD timestamps in both directions.

Runs entirely in your browser. Nothing you paste is sent anywhere.

Where you meet these

  • Unix seconds in JWT exp and iat claims, logs, and most APIs.
  • Milliseconds from JavaScript's Date.now() and many JSON APIs.
  • Windows FILETIME in Active Directory attributes like pwdLastSet,lastLogonTimestamp, and accountExpires, which you see during LDAP enumeration.

Timelines win investigations

In incident response everything hinges on putting events in order across systems that log in different formats and time zones. Normalize to UTC first, always.