javahandson.com · developer tools

Unix Timestamp Converter

Turn epoch timestamps into readable dates in any timezone, and back again. Handles seconds, milliseconds, microseconds and nanoseconds, knows about daylight saving, and never sends your data anywhere.

Unix time right now

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Timestamp to date

reading as seconds

Paste anything from a log line. Digit count decides the unit: 1700000000 is seconds, 1700000000123 is millis.

Date to timestamp

Converted

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UTC —

The same instant elsewhere

Timezone comparison

Turn on Follow the clock above and this becomes a live world clock.

night dawn / dusk daylight the line marks the converted instant · ticks are 06:00, 12:00, 18:00

Ready to paste

The same conversion in Java

java.time, JDK 8 and up







  

    Convert a whole column at once
    

      
Paste one value per line — epoch numbers, dates, or a mix of both. Everything is read in the timezone selected above.

      
      

        
        
        
        nothing converted yet
      

      

    

  







  

    Timestamps worth knowing
    

      
Select any row to load it into the converter.

      

    

  







  

    Self-test 
    

      
Every conversion above is checked against known-good values — real DST transitions, half-hour and quarter-hour zones, pre-1970 dates, and 600 randomised round-trips across twelve zones. If anything here fails, don't trust the output.