Timestamp Converter
Convert Unix seconds or milliseconds to dates, or ISO dates to timestamps.
Whole seconds or milliseconds only. Dates must be valid and within years 0001–9999. The display time zone does not change the input date's offset. All processing stays on this device.
Result
Your result will appear here after processing.
How do I use this tool?
Choose seconds, milliseconds or ISO date input. ISO dates must include Z or a numeric UTC offset. Select a display time zone for the result.
What does it support?
Whole seconds or milliseconds only. Dates must be valid and within years 0001–9999. The display time zone does not change the input date's offset.
Does my input leave my device?
No. Processing runs locally in your browser. Input and results are kept only on this page and are cleared when you leave, reload or clear the tool. Copy and download happen only when you choose those actions.