Does it handle seconds and milliseconds?

Yes — the input is auto-detected, and the output shows both Unix seconds and milliseconds.

Which time zone is used?

It shows the UTC string and the ISO-8601 value, so the instant is unambiguous regardless of your local zone.

Yes — the conversion happens entirely in your browser; nothing is uploaded.

Unix Timestamp Converter

Live

Convert between Unix time and ISO dates.

All generated data is fictional and intended for development, testing, QA, prototyping, and automation only. Do not use it for fraud, impersonation, or illegal activity.

{
  "input": "1700000000",
  "unixSeconds": 1700000000,
  "unixMillis": 1700000000000,
  "iso8601": "2023-11-14T22:13:20.000Z",
  "utc": "Tue, 14 Nov 2023 22:13:20 GMT",
  "dayOfWeek": "Tuesday"
}

About this tool

Paste a Unix timestamp (seconds or milliseconds — auto-detected) or an ISO-8601 date and get both directions: Unix seconds/millis, ISO-8601, UTC string and the weekday. Useful for debugging logs and API payloads.

How it works

Paste a Unix timestamp (seconds or milliseconds) or an ISO-8601 date.
The converter auto-detects the input and shows both directions.
Read Unix seconds/millis, ISO-8601, the UTC string and weekday — all locally.

Example output

{
  "input": "1700000000",
  "unixSeconds": 1700000000,
  "unixMillis": 1700000000000,
  "iso8601": "2023-11-14T22:13:20.000Z",
  "utc": "Tue, 14 Nov 2023 22:13:20 GMT",
  "dayOfWeek": "Tuesday"
}

Frequently asked questions

Does it handle seconds and milliseconds?: Yes — the input is auto-detected, and the output shows both Unix seconds and milliseconds.
Which time zone is used?: It shows the UTC string and the ISO-8601 value, so the instant is unambiguous regardless of your local zone.
Does it run locally?: Yes — the conversion happens entirely in your browser; nothing is uploaded.

Unix Timestamp Converter

Configuration

About this tool

How it works

Example output

Frequently asked questions

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