Developer tools
Unix timestamp converter
Convert Unix timestamps (seconds or milliseconds) to UTC / local time, and ISO dates back to Unix.
UTC:
2026-09-21T20:46:21.000ZLocal:
Mon Sep 21 2026 20:46:21 GMT+0000 (Coordinated Universal Time)Milliseconds: 1790023581000
Unix timestamp:
1790023581Your data never leaves the browser.
How it works
- Paste a Unix timestamp (10-digit seconds or 13-digit ms).
- Or enter an ISO / parseable date string below.
- Copy UTC ISO or Unix seconds as needed.
FAQ
- Seconds or milliseconds?
- Values below 1e12 are treated as seconds; larger values as milliseconds.
- Is anything sent to a server?
- No. Conversion is local.