Unix Timestamp to Date
Turn a Unix timestamp into a readable date.
About Unix Timestamp to Date
Unix Timestamp to Date turns a raw epoch value from a log line, database row or API response back into a readable date — shown as ISO 8601, UTC and your local time side by side. The unit (seconds vs. milliseconds) is auto-detected from the magnitude, or you can force it.
Seeing UTC and local time together prevents the most common misreading: an event that happened at 23:50 UTC yesterday is "today" locally, and half of all timestamp confusion in bug triage is exactly this.
How to use
- Paste the timestamp into "Unix timestamp".
- Leave "Unit" on auto-detect, or force seconds/milliseconds if your value is unusual.
- Click "Convert to date" and read the ISO 8601, UTC and local renderings.
- "Now" inserts the current timestamp if you want a reference point.
Frequently asked questions
How does auto-detect know seconds from milliseconds?
By magnitude: values of 1e12 and above are treated as milliseconds (13 digits, dates after 2001), smaller ones as seconds. Recent timestamps detect correctly; for far-past or far-future values, set the unit explicitly.
Why does the date look one day off?
Almost certainly the time zone: near midnight UTC, local time falls on a neighboring day. Compare the UTC and local lines in the output — the instant is the same, only the calendar label differs.
What are negative timestamps?
Instants before January 1, 1970 UTC — Unix time simply counts negative. They are valid and this converter handles them; whether your application does is worth a test.