What is this Unix timestamp converter?
A free, browser-based tool that converts between Unix epoch time and a human-readable date/time, in both directions. Paste a Unix timestamp in seconds or milliseconds — it auto-detects the unit — and see the local date/time in a chosen zone, the ISO 8601 string, and UTC. Or enter a date and time in a zone to get the epoch seconds and milliseconds back. Everything runs locally in your browser, so your data is never uploaded.
How to use it
- Choose a direction: “Epoch → date” or “Date → epoch”.
- Pick the time zone — UTC, a city, or your device's local zone.
- Enter a Unix timestamp (seconds or milliseconds, auto-detected), or a date and time. Use “Now” to fill in the current moment.
- Copy any of the results — formatted date, ISO 8601, UTC, or epoch values.
Common use cases
- Reading epoch timestamps from logs, JWTs, or API responses as a real date.
- Generating a Unix timestamp for a specific date/time to use in code or a query.
- Checking how a timestamp lands across UTC and a local zone, DST included.