Unix Timestamp
Epoch ↔ human time, live.
Runs in your browserRelated
About
Unix Timestamp converts between epoch time and human-readable dates in both directions, auto-detecting whether a pasted number is in seconds, milliseconds, or microseconds by its magnitude. It shows the same instant in eight formats at once — ISO 8601, UTC, local time, RFC 2822, and more — so you don't have to guess which one a given API expects. A live "now" clock updates every second. Nothing you paste is sent off your device.
Frequently asked
- How does it know if my timestamp is in seconds or milliseconds?
- It checks the magnitude of the number: values above roughly 10 billion are treated as milliseconds, below that as seconds, which covers virtually every real-world timestamp.
- What date formats does it output?
- Eight at once: Unix seconds, Unix milliseconds, ISO 8601, UTC string, local string, RFC 2822, and a human-readable relative time, all updating together.