Epoch / Unix timestamp converter
Convert Unix timestamps to dates and back. Auto-detects seconds vs milliseconds; runs in your browser.
Runs 100% in your browser Current Unix time —
How to convert a Unix timestamp
- Enter a timestamp. Paste a Unix timestamp (seconds or milliseconds) to see the date.
- Or pick a date. Use the date field to convert a calendar date back to a timestamp.
- Copy what you need. Grab the seconds, milliseconds or ISO string.
About Unix time
Unix time is the lingua franca of timestamps in logs, databases and APIs because it's a single number with no timezone ambiguity. Systems store seconds (or milliseconds) since the 1970 epoch and format to a human date only at the edges. This converter shows both interpretations and renders the result in your local zone and UTC so you can sanity-check log lines and API responses instantly.
Frequently asked questions
- It is the number of seconds (or milliseconds) elapsed since 00:00:00 UTC on 1 January 1970, the "Unix epoch". It is a timezone-independent way to represent a moment in time.
- A 10-digit number is seconds; a 13-digit number is milliseconds. This converter auto-detects based on length, and you can see both interpretations.
- Both your local timezone and UTC are shown, plus the ISO 8601 string. Conversion happens in your browser using its clock and locale.
- No — all conversion runs locally in your browser.