Does this tool upload my data?
No backend upload is used by this browser-first tool.
Track elapsed time in the browser.
Track elapsed time in the browser.
Ready tools are shown first.
Convert timestamps into readable dates and back.
Calculate the number of days between two dates.
Find the difference between dates in years, months, weeks, and days.
Calculate working days between dates excluding weekends.
Add or subtract days, weeks, months, or years from a date.
Convert dates between common formats.
Track elapsed time with start, pause, reset, and lap controls in the browser.
No backend upload is used by this browser-first tool.
Yes. Output can be copied after processing where relevant.
Input may be empty, malformed, too large, or unsupported for the selected operation.