How do I tell seconds from milliseconds?
10-digit values are usually Unix seconds; 13-digit values are usually milliseconds. The tool infers from the numeric range.
Timestamp Converter
DevTools Timestamp Converter converts between Unix seconds, Unix milliseconds, ISO 8601, and local time strings—ideal for log debugging, database fields, and API integration.
Timestamp Converter
Convert quickly between Unix seconds, Unix milliseconds, ISO dates, and local time strings.
- Unix seconds
- 1719984000
- Unix milliseconds
- 1719984000000
- ISO 8601
- 2024-07-03T05:20:00.000Z
- Local time
- 2024年7月3日星期三 UTC 05:20:00
- UTC
- Wed, 03 Jul 2024 05:20:00 GMT
About this tool
Enter a numeric timestamp or date string and get seconds, milliseconds, ISO, local timezone, and UTC outputs side by side—no manual math required.
How to use
- Enter Unix seconds, Unix milliseconds, or a date string.
- Review the auto-generated time formats.
- Copy the format you need for code, SQL, or API requests.
FAQ
Does it support ISO dates?
Yes. Strings like 2026-07-06T10:45:00Z parse directly and output local time and UTC.
Why do local time and UTC differ?
UTC has no local offset; local time uses your browser timezone. The same instant can show different text—that is expected.
Is processing local?
Yes. Conversion runs in your browser.
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