Unix Timestamp Converter
A free, browser-based converter. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Input
Unix timestamp (s or ms)
…or a date/time
Output
Enter values to see the result.
Runs entirely in your browser. Your input is not uploaded or stored.
How to use this calculator
- Enter a Unix timestamp to get the date, or a date/time to get the timestamp.
- Copy the result.
How it works
A Unix timestamp is seconds (or milliseconds) since 1 Jan 1970 UTC. The tool converts both ways and auto-detects seconds vs milliseconds.
Worked example
0. = 1970-01-01T00:00:00.000Z.
Tips
- Runs entirely in your browser. Your input is not uploaded or stored.
Frequently asked questions
Seconds or milliseconds?
Both — values above ~1e12 are treated as milliseconds, otherwise seconds.
Privacy?
Runs entirely in your browser. Your input is not uploaded or stored.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.