Unix Timestamp Converter

Convert timestamps and dates (s/ms/us/ns + batch TSV)

100% In-BrowserNo Server UploadFree, No Signup

Date & Time

Input (Timestamp or Date)

Conversion Result

How to Use

Enter timestamp or date
Enter a Unix timestamp (number) or a date string (YYYY-MM-DD HH:MM:SS).
Click Convert
Press "Convert" to automatically detect the input format and convert.
Copy result
Use the "Copy" button to copy the result to your clipboard.

Unix Timestamp Converter Examples

Timestamp → Date (UTC)

Input

1700000000

Output

Unix Timestamp (s):  1700000000
Unix Timestamp (ms): 1700000000000
ISO 8601 (UTC): 2023-11-14T22:13:20.000Z
UTC:       2023-11-14 22:13:20 UTC

The tool also prints local time and a relative label (varies by environment).

Date (ISO 8601) → Timestamp

Input

2024-01-15T09:30:00Z

Output

Unix Timestamp (s):  1705311000
Unix Timestamp (ms): 1705311000000
ISO 8601 (UTC): 2024-01-15T09:30:00.000Z
UTC:       2024-01-15 09:30:00 UTC

ISO strings with “Z” are interpreted as UTC.

Features

Bidirectional Unix timestamp ↔ date conversion
Auto-detect seconds/milliseconds/microseconds/nanoseconds
Assume-UTC option for TZ-less date strings
Batch (line-by-line) conversion to TSV
Current timestamp display (seconds/milliseconds)
Local processing (your input is not sent to servers)
Lightweight responsive UI

FAQ

What is a Unix timestamp?

A Unix timestamp (epoch time) is the number of seconds elapsed since January 1, 1970 00:00:00 UTC. It is widely used in programming and databases to represent date and time.

Does it support millisecond timestamps?

Yes. Numbers with 13 or more digits are automatically detected as millisecond timestamps. This covers the format returned by JavaScript's Date.now().

Is my data sent to a server?

No. All conversion happens locally in your browser via JavaScript. No data is ever transmitted externally.