Timestamp Converter
Paste a Unix timestamp or a date string and get the other format back immediately, shown in both UTC and your local timezone.
Overview
Unix timestamps (seconds or milliseconds since 1970-01-01 UTC) are what most APIs, databases, and logs actually store, but they're not readable at a glance — and a timestamp displayed in UTC can look wrong until you account for your local offset. This tool converts in both directions and shows both timezones side by side, which is usually the fastest way to confirm whether a timestamp means what you think it means.
Examples
Unix seconds to date
1700000000
UTC: 2023-11-14T22:13:20.000Z
How It Works
- Paste a Unix timestamp, or a date string, into the input box.
- Click Convert to see the other format.
- Read the result in both UTC and your browser's local timezone.
FAQ
No. All conversion happens locally using your browser's built-in Date object.
Yes. Enter a plain number — if it's larger than a typical seconds-based timestamp (13 digits or more), it's treated as milliseconds automatically.
Any format JavaScript's Date constructor understands, including ISO 8601 (e.g. 2024-01-15T10:30:00Z).
The local time reflects your browser's own timezone setting relative to UTC — both represent the same instant, just displayed with a different offset.
Yes — the Current Unix Timestamp section at the top of the page updates live, once a second, in both seconds and milliseconds, without needing to click Convert.