THE TIME TOOLBOX
Batch Timestamp Converter
Paste a list of timestamps, then copy the results or export them as CSV.
Up to 1,000 lines. The selected unit applies to the whole list. Your data stays in your browser.
| Value | ISO date · UTC | Status |
|---|
Check the original unit
A column exported by JavaScript often uses milliseconds; a Unix export often uses seconds. Selecting a single unit prevents the format from silently changing between lines.
Invalid lines are flagged and kept in the export. ISO dates are displayed to the millisecond; the CSV seconds column preserves the fractional value down to nanoseconds.