Unix Timestamp Converter
Convert Unix timestamp ↔ ISO 8601 / local / UTC. Auto-detect seconds vs ms vs μs. Live ticker.
published
- [FREE]
- [NO_SIGNUP]
- [NO_UPLOAD]
A Unix timestamp converter translates between epoch seconds/ms/μs and human-readable date strings. Auto-detects the unit, shows ISO 8601 + local + UTC + relative simultaneously, and a live current-epoch ticker.
Privacy
Pure JS. No upload.
Related tools
- Cron Expression Builder — when you want a schedule rather than a single moment.
- Date Difference Calculator — span between two dates.
Frequently asked questions
Why three unit choices?
Different systems use different magnitudes. Unix CLI uses seconds. JavaScript Date.now() returns milliseconds. Some high-precision logging uses microseconds. The unit dropdown lets you match what your source emits; auto-detection switches based on magnitude.
How does auto-detection work?
Values under 1e11 (≈ year 5138 in seconds) are seconds. 1e11-1e14 are milliseconds. Larger are microseconds. The threshold catches the realistic ranges; if you paste something exotic, switch the unit manually.
Is the relative time live?
The "current epoch" ticker updates every second. The relative time for a parsed timestamp updates with it.
Privacy?
Pure JS Date + Intl. No upload.