Free online Unix timestamp converter. Convert timestamps to dates and vice versa. Supports seconds and milliseconds with auto-detection. Displays local time, UTC, ISO 8601, RFC 2822 formats. Pure frontend, no server uploads. | No Signup, Client-Side · No Server Uploads
Zero Dependencies·Works OfflineThe Unix timestamp is the most widely used time representation in computer science, defined as the number of seconds since January 1, 1970 00:00:00 UTC. This tool provides fast and accurate conversion between Unix timestamps and human-readable dates, with automatic detection of second and millisecond precision.
In API development, database queries, log analysis, and more, Unix timestamps are everywhere. Developers frequently need to convert timestamps to readable formats for debugging, or convert dates to timestamps for programming.
A Unix timestamp is the number of seconds (or milliseconds) that have elapsed since January 1, 1970 00:00:00 UTC, excluding leap seconds. It is widely used in computer systems.
This tool auto-detects: 10-digit numbers are seconds, 13-digit numbers are milliseconds. Current Unix seconds are around 1.7 billion.
Local time, UTC, ISO 8601 (e.g. 2024-03-18T00:00:00.000Z), RFC 2822 (e.g. Mon, 18 Mar 2024 00:00:00 GMT), relative time, and more.
No. All timestamp conversions are performed locally in your browser. No data is ever uploaded to any server.
The datetime-local picker uses your local timezone. The resulting timestamp is a UTC Unix timestamp.