YYTOOLS / THE EVERYDAY TOOLBOX
Timestamp Converter
Convert Unix timestamps to readable dates and back when debugging APIs and logs.
Processed locally · No upload · No sign-up
Dates are shown in UTC. Date input requires seconds and an explicit Z or ±hh:mm time zone, with up to three fractional digits. Unix seconds are rounded down.
How to use
- Choose Timestamp → Date or Date → Timestamp.
- Enter an integer timestamp and select its unit, or an ISO date with an explicit time zone.
- Convert, review the UTC date and Unix seconds/milliseconds, then copy the result.
Supports zero and negative timestamps. Dates must be valid calendar dates in YYYY-MM-DDTHH:mm:ss(.SSS)Z format or with a ±hh:mm offset, a four-digit year and up to three fractional digits. Invalid dates such as February 30 are rejected. Timestamp magnitude is limited to 8,640,000,000,000,000 milliseconds; seconds are rounded down.