Convert Unix timestamps to ISO 8601, RFC 3339 and RFC 2822 strings. Pick any IANA timezone for the offset. Free online converter, no upload. All processing runs locally in your browser. Your data is not uploaded to any server.
100% Local Processing
How to Use
Turn a raw timestamp into the exact date string your framework wants. Choose a timezone to control the offset portion of the ISO string.
Steps
Paste a timestamp into the input box.
Optionally choose a timezone so the offset portion of the ISO string is what you expect.
Click Format and copy the representation you need.
Output formats
ISO 8601 in UTC, for example 2026-06-15T12:00:00Z.
ISO 8601 with your local or selected offset, for example 2026-06-15T20:00:00+08:00.
RFC 3339 and RFC 2822 strings.
MySQL DATETIME, SQL DATE, Unix seconds and Unix milliseconds.
Features
Nine formats at once, so you rarely need a second tool.
Daylight saving is handled by the browser, not a static offset table.
The unit of numeric input is detected automatically.
All processing runs locally in your browser. Your data is not uploaded to any server.