Also available in the Chrome extension Every Zase tool also lives in the free Developer Toolkit by Zase extension: fully offline, in a window or the side panel, one keyboard shortcut away.
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About this Timestamp Converter
The Timestamp Converter translates Unix epoch timestamps into human readable dates and back, handling both seconds and milliseconds. It is the tool for log files, JWT claims and database rows full of numbers like 1761984000 that mean nothing until you convert them.
How to use the Timestamp Converter
- Paste a timestamp and read the date in UTC and your local time, plus a relative form.
- Or pick a date and time to get the epoch value for it.
- Copy the format you need: ISO, relative, seconds or milliseconds.
Good to know
- A ten digit value is seconds, thirteen digits is milliseconds; mixing them up is the classic timestamp bug.
- JWT exp and iat claims are in seconds, so this pairs naturally with the JWT Decoder.
- Relative output (in 3 days, 2 hours ago) is the fastest sanity check on a log line.