Developer Tools
Timestamp Converter
Convert Unix timestamps to dates and back.
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Unix timestamp
From Unix
Enter a valid Unix timestamp.
Date and time
From date
Pick a valid date and time.
About this tool
Unix time is seconds (or milliseconds) since 1970-01-01 UTC. This page converts both ways using the browser clock and timezone.
How to use
- Enter a Unix value, or pick a local date-time.
- Values with 13 or more digits are treated as milliseconds.
- Copy ISO UTC or Unix seconds.
Formula and methodology
If |n| ≥ 1e12 then n is milliseconds, else n × 1000. Date.toISOString is UTC.
Worked example
1700000000 is 2023-11-14 22:13:20 UTC.
Frequently asked questions
Which timezone is local?+
Your browser’s current timezone.
Is the conversion uploaded?+
No.
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