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Locale-aware

Unix timestamp converterUS · en-US

Keep the input unit explicit and compare the exact integer with UTC and locale-formatted time.

All entries, times, and results stay in this tab.

Ready.

How to use it

Use this converter to inspect log, API, database, or token timestamps while preserving their stated precision.

  1. Choose timestamp-to-date or RFC 3339-to-timestamp and select seconds or milliseconds.
  2. Enter a signed integer, or an RFC 3339 instant with Z or a numeric offset.
  3. Convert and review the exact Unix value, UTC ISO text, and localized device-zone display.

Worked example

Input
0 seconds
Output
1970-01-01T00:00:00.000Z

Seconds and milliseconds are never auto-detected; the selected unit is part of the input.

Method and definitions

  • Signed integers are parsed exactly with BigInt and scaled to ECMAScript millisecond time values.
  • RFC 3339 fields and numeric offsets are validated before conversion; leap seconds are not represented by Date.

Limits and edge cases

  • Human-readable output is limited to the ECMAScript Date range and millisecond precision.
  • The tool does not infer microseconds, nanoseconds, Excel dates, GPS time, TAI, or an unstated local zone.

Privacy

Entries, dates, times, and results remain in this tab. Rigula does not upload them or add them to the URL.