Unix timestamp converter

Translate between Unix epoch values and human-readable dates in seconds or milliseconds, with ISO 8601, UTC, and local representations — plus one-click "Now".

How to Unix timestamp converter

1. Step 1. Paste an epoch value (seconds or ms) or an ISO date into the Input Buffer.
2. Step 2. Click Stamp → Date, Date → Stamp, or Now.
3. Step 3. Read the conversions in the Output Buffer.

Frequently asked questions

How do I know if a timestamp is in seconds or milliseconds?

13-digit values are treated as milliseconds and 10-digit values as seconds; auto-detection handles both. You can also pad a value yourself before converting.

Which date formats are shown?

Unix seconds and milliseconds, ISO 8601 in UTC and local time, the UTC string, and a fully-localized timestamp.

Is conversion offline?

Yes — all conversions use your browser's local clock and date engine.