Timestamp Converter

Read any timestamp — Unix, Active Directory / FILETIME, .NET ticks, Chrome, Apple, Excel — or the time inside a UUID, ULID or ObjectId, across time zones.

Runs entirely in your browser. Your browser blocks this page from opening connections or loading anything from other sites. Nothing you enter is uploaded or saved.

requests since opened: 0
How to verify this yourself
  1. Open your browser’s developer tools (F12, or ⌥⌘I on Mac) → Network tab, then use the tool. No new requests appear.
  2. Or disconnect from the internet after the page loads — the tool keeps working, because it never needed the network.
  3. See the rule itself: in the Network tab, select this page’s document → Response Headers → content-security-policy contains connect-src 'none' and no 'unsafe-inline' for scripts.
  4. Press Test the lock: the page tries a harmless request and the browser blocks it (the Console shows the refusal).
How to use
  1. Paste a number, a date or an ID.
  2. If the number fits several formats, pick the one your system uses.
  3. Compare time zones, or paste a second value to get the time between them.
now—

Common questions

How do I convert an Active Directory timestamp?

Paste the value of lastLogonTimestamp, pwdLastSet or accountExpires. It is read as a Windows FILETIME (100-nanosecond intervals since 1601), and 0 or 9223372036854775807 are shown as “never”.

Seconds or milliseconds?

The converter tries every common format and lists each reading that gives a sensible date, so you can pick the one your system uses.

Can I see when a UUID was created?

Yes, for UUID versions 1, 6 and 7, ULIDs and MongoDB ObjectIds, which store their creation time. Random UUIDs (version 4) do not.

Known limitations

  • Numbers are read in every plausible format between 1990 and 2100; you choose the right one.
  • Leap seconds are ignored, as in Unix time. Precision below a millisecond is shown but not kept in conversions.
  • Browser extensions with access to this site can read the page. For sensitive data, use a private window with extensions off. How the lock works

tools v0.9.0 · build 7317bbb · 2026-10-07

Related reading on CipherMind

Standards & references