Unix timestamp converter
Free · no sign-upConvert Unix timestamps to human dates and back — seconds or milliseconds, right in your browser.
Convert a Unix timestamp into a human-readable date, or turn a date back into a Unix timestamp — instantly, in your browser. This free converter shows the local time, UTC, ISO 8601 and a relative time, auto-detects seconds vs milliseconds, and gives you the current timestamp live. Nothing is uploaded.
- ✓Timestamp → local, UTC, ISO and relative time
- ✓Date → Unix seconds and milliseconds
- ✓Auto-detects seconds vs milliseconds
- ✓Live current timestamp, copyable
- ✓Runs in your browser — nothing uploaded
Who it's for
- Developers reading timestamps from logs or APIs
- Converting a date to a Unix value for a query
- Checking when an epoch value falls
- Debugging expiry or created-at fields
How it works
- 1Paste a Unix timestamp to see the date.
- 2Or pick a date to get the timestamp.
- 3Copy the value you need.
Frequently asked questions
What is a Unix timestamp?+
The number of seconds (or milliseconds) since 1 January 1970 UTC — a compact, timezone-free way to store a moment in time, used across programming and APIs.
Seconds or milliseconds?+
The tool auto-detects: 10-digit values are read as seconds, 13-digit values as milliseconds. Most back-ends use seconds; JavaScript uses milliseconds.
Does it handle time zones?+
It shows both your local time and UTC. The timestamp itself is timezone-free; the local display uses your device's zone.
Is anything uploaded?+
No. Conversion happens entirely in your browser — nothing is sent to a server.
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