Tool
Timestamp Converter
Switch between Unix seconds, milliseconds, local time, UTC, and ISO 8601.
Current time
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Convert
How to use
Paste a Unix timestamp or pick a local date and time. Auto treats 13-digit values as milliseconds and shorter values as seconds. Everything stays on your device.
FAQ
- Seconds or milliseconds?
- A 10-digit value is usually seconds (for example 1700000000). A 13-digit value is usually milliseconds. Use the unit selector if Auto gets it wrong.
- Which timezone is the date field?
- The date picker uses your browser local timezone. UTC and ISO 8601 are shown next to it so you can compare.
- Is data uploaded?
- No. Conversion runs locally in the browser.