Unix Timestamp Converter
Convert Unix timestamps to readable dates, or turn a date and time into seconds and milliseconds. Local time and UTC are shown side by side.
Debug dates without guessing the timezone
Unix timestamps show up everywhere a developer looks — server logs, API responses, database rows, analytics exports, JWT expiry claims, and webhook payloads. The friction is always the same two questions: is this value in seconds or milliseconds, and is the date I'm reading local time or UTC? Guess wrong and you get an off-by-hours or off-by-1000× bug that's maddening to track down.
This converter removes the guesswork by showing everything at once. Paste a timestamp and it renders the local time and the UTC time side by side, plus the value in both seconds and milliseconds; enter a date and it works backward to the timestamp. It auto-detects 13-digit millisecond values so you don't have to.
Private and instant
Every conversion uses the browser's native Date object and runs locally — nothing about your logs or
data leaves the page. Hit "Use Current Time" to grab the exact timestamp for right now.
Frequently Asked Questions
What is a Unix timestamp?
A Unix timestamp is the number of seconds since January 1, 1970 at 00:00:00 UTC. Some systems use milliseconds instead of seconds.
Does this use my local timezone?
The tool shows both your local time and UTC so you can compare what a timestamp means in each context.
Can I convert milliseconds too?
Yes. The converter detects long millisecond timestamps and also displays both seconds and milliseconds for any date you enter.
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