OomTools

Unix Epoch Timestamp Converter

Go either direction between Unix timestamps and readable dates — timestamp to date, or date to Unix seconds or milliseconds — without anything leaving your browser. It auto-detects seconds versus milliseconds, shows UTC, local, ISO 8601 and relative time, and keeps a live current-timestamp clock you can pause. Negative timestamps and pre-1970 dates work as expected.

  • 100% free
  • Private & safe
  • Runs in your browser

Why use Unix Timestamp Converter?

Unix Timestamp Converter works out the answer precisely from local calendar dates, so there are no timezone or daylight-saving surprises.

  • Runs instantly in your browser — nothing to install, nothing uploaded.
  • Completely free, with no account, no watermarks and no usage limits.
  • Handles Seconds since 1970-01-01T00:00:00Z; Milliseconds since the same epoch.
  • To read a timestamp, paste it and let the tool auto-detect seconds or milliseconds (or set it manually).
  • Works on any device — desktop, tablet and phone — and is fully keyboard accessible.

How to use Unix Timestamp Converter

  1. To read a timestamp, paste it and let the tool auto-detect seconds or milliseconds (or set it manually).
  2. See the UTC, local, ISO 8601, relative time and weekday for that instant.
  3. To build a timestamp, enter a date and time and choose UTC or local interpretation.
  4. Use the live clock for the current Unix time, and copy any value with one click.

Examples

  • Converting 1700000000 to a human-readable UTC date.
  • Getting the Unix seconds for a specific local date and time.

Supported formats & limits

  • Seconds since 1970-01-01T00:00:00Z
  • Milliseconds since the same epoch

Limitations

  • Local conversions depend on your device's timezone and daylight-saving rules.
  • Auto-detection uses magnitude; override it if your value is unusual.

Frequently asked questions

Does it handle milliseconds?

Yes. It auto-detects millisecond values and you can force seconds or milliseconds manually.

Can it handle dates before 1970?

Yes. Negative timestamps and pre-1970 dates are supported.

Is my input sent anywhere?

No. All conversion happens in your browser.

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