Date and Time
4 tools
Unix Timestamp Converter
Convert Unix timestamps to dates and dates to timestamps, both directions in one place.
Date Difference
Calculate the difference between two dates and times.
Timer
Run a simple countdown timer in your browser.
Stopwatch
Measure elapsed time with laps in your browser.
4 tools: Unix Timestamp Converter, Date Difference, Timer, Stopwatch. All of them run in the browser, with no account and no upload to a server.