Developer Tools
Timestamp Converter
Convert Unix timestamps to readable dates and back, in both seconds and milliseconds.
About the Timestamp Converter
A Unix timestamp counts the seconds since 1 January 1970 UTC and is used throughout software and databases. This converter translates between timestamps and human-readable dates in both directions.
It auto-detects seconds versus milliseconds and shows the local time, UTC and ISO 8601 formats — all processed in your browser.
How to use the Timestamp Converter
- Choose Timestamp → Date or Date → Timestamp.
- Enter your value.
- Click Convert to see the result in multiple formats.
How the calculation works
Date = new Date(timestamp × 1000) · Timestamp = Date.getTime() ÷ 1000
Example
The timestamp 1750000000 corresponds to 15 June 2025, 14:26 UTC.
Frequently asked questions
It is the number of seconds elapsed since the Unix epoch, 00:00:00 UTC on 1 January 1970.
Yes, the tool auto-detects whether your value is in seconds or milliseconds and converts accordingly.
Local time, UTC and ISO 8601, so you can copy the one your system needs.
Yes, all conversions run locally in your browser with nothing sent to a server.