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AD / LDAP Timestamp

Convert Windows FILETIME (pwdLastSet, lastLogon, accountExpires) to real time.

Why this exists

AD stores times as FILETIME, an 18-digit count of 100-nanosecond intervals since 1601. The normal Timestamp tool doesn't speak it, and the 'never' sentinel values trip everyone up.

How to use
  1. Paste a FILETIME integer (e.g. 133900000000000000), or a date to go the other way.
  2. Output: UTC, your local zone, and relative time.
  3. Sentinels (0 and 9223372036854775807) are recognised as 'never'.

Worked examples

Attributes stored as FILETIME

pwdLastSetlastLogonlastLogonTimestampaccountExpiresbadPasswordTimelockoutTimelastLogoff

These all count 100-nanosecond intervals since 1601-01-01 UTC. Both 0 and 9223372036854775807mean “never”.