# Unix timestamp & timezone converter — no upload

> Convert Unix timestamps to human dates and back, across timezones, in your browser. Handles seconds and milliseconds. Nothing is uploaded.

Convert Unix epoch timestamps to readable dates and back, across timezones, handling both seconds and milliseconds. Everything is computed in the browser with no network call.

Logs and databases store time as an epoch integer that's meaningless at a glance. Converting to a human date — in the right timezone — is a constant debugging need, and going the other way lets you craft test values.

For formatting patterns, see the Date format token reference; for other number representations, use the number base converter.

## How to

1. **Enter a value.** Paste a Unix timestamp or pick a date/time.
2. **Choose units & zone.** Set seconds or milliseconds and the timezone.
3. **Read the result.** See the converted date or epoch value.

## FAQ

### Seconds or milliseconds?

Unix time is classically in seconds, but JavaScript and many APIs use milliseconds. The tool handles both — a 13-digit value is typically milliseconds, 10 digits seconds.

### Can it show the time in another timezone?

Yes. Pick a timezone and the same instant is shown in that zone, which is essential for debugging logs from different regions.

### Is anything uploaded?

No. The conversion is pure math done in the browser, so nothing leaves your device.


## Related tools

- [Date tokens](https://www.safepaper.app/dev/date-format-tokens)
- [Number base](https://www.safepaper.app/dev/number-base)
- [Cron explainer](https://www.safepaper.app/dev/cron)
- [JSON toolkit](https://www.safepaper.app/dev/json-toolkit)

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Canonical HTML: https://www.safepaper.app/dev/unix-timestamp-converter
Markdown: https://www.safepaper.app/dev/unix-timestamp-converter.md

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