Free Unix Time Converter
A log line says 1793188800. Is that seconds or milliseconds, and what date is it? Paste the number — or pick a date and go the other way — and get ISO, UTC, local time and a relative description in one view.
Timestamp to date
Date to timestamp
Something not working?
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| Feature | Free | Pro |
|---|---|---|
| Timestamp to date and back, seconds and milliseconds | Yes | Yes |
| ISO, UTC, local and relative time | Yes | Yes |
| Batch-convert a column of timestamps | — | Yes |
| Ads | — | Yes |
Frequently asked questions
How do I tell seconds from milliseconds?
Count the digits: a current timestamp in seconds has 10 digits, in milliseconds 13. Converting 1793188800 as milliseconds gives a date in January 1970; converting 1793188800000 as seconds gives a date tens of thousands of years out — both mistakes are immediately visible in the result table.
What is Unix time, exactly?
The number of seconds (or milliseconds) since 00:00:00 UTC on 1 January 1970, not counting leap seconds. APIs, logs and databases use it because it is a single number with no timezone ambiguity — until a human has to read it.
Which timezone is "local time"?
Your browser's timezone. The ISO and UTC rows are timezone-free, so they are the ones to copy into a bug report or a log comment.
Is anything uploaded?
No. Conversion runs in your browser; there is no input to upload in the first place.