ISO Date Converter Online

Convert an ISO timestamp with an explicit UTC offset to UTC, Unix seconds and milliseconds. Free iso date converter online, with no installation or account.

Tool capabilities

Input: TXT
Output: TXT · JSON

How to use ISO Date Converter

Convert an ISO timestamp with an explicit UTC offset to UTC, Unix seconds and milliseconds. This iso date converter works directly in your browser and is free to use without an account.

Paste or open your input in the editor.
Run the tool and inspect the output. If the input is invalid, correct the reported error and run it again.
Copy the result or download it to your device.

ISO Date Converter · Example

Input

2026-09-08T09:30:00+09:00

Output

{
  "utc": "2026-09-08T00:30:00Z",
  "unixSeconds": 1788827400,
  "unixMilliseconds": 1788827400000,
  "epochNanoseconds": "1788827400000000000"
}

Convert an ISO timestamp with an explicit UTC offset to UTC, Unix seconds and milliseconds.

Usage notes

Inputs and results are processed on this device. Tool content is not sent to a processing server.

ISO Date Converter