Convert Unix timestamps (seconds or milliseconds) to local dates and back. Essential when reading API logs, database rows, or JWT exp fields.
Unix timestamp
Convert Unix seconds, milliseconds, or a parseable date string.
- Detected as
- seconds
- Milliseconds
- 1789144918000
- Seconds
- 1789144918
- ISO (UTC)
- 2026-09-11T16:41:58.000Z
- Local
- Fri Sep 11 2026 16:41:58 GMT+0000 (Coordinated Universal Time)
How to use Unix timestamp
- Paste a Unix timestamp or pick a date/time.
- See conversions in both directions.
- Copy the value you need for logs or queries.
Example: 1700000000 seconds since epoch maps to a specific UTC instant.
Frequently asked questions
- Seconds or milliseconds?
- Unix time is usually in seconds, but JavaScript uses milliseconds. A 13-digit number is typically milliseconds and a 10-digit number is seconds.
- What is the epoch?
- The Unix epoch is midnight UTC on 1 January 1970. Timestamps count the seconds elapsed since that fixed reference point.