Unix Timestamp Converter

Unix Timestamp Converter

Local Processing

Convert Unix timestamps to dates and dates to timestamps.

How It Works & Processing Standards

Convert Unix timestamps to dates and dates to timestamps.

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Current Limits

  • Maximum input length: 100,000 characters

A Unix timestamp counts seconds (or milliseconds) since 1970-01-01 00:00:00 UTC. Choose timestamp → date or date → timestamp under "Task". An offset such as +09:00 in the date is honoured.

What You Can Do

Timestamp → date
Detects 10-digit seconds or 13-digit milliseconds and gives the UTC ISO time.
Date → timestamp
Converts local time in the chosen zone (UTC, Seoul…) to seconds and milliseconds.

How to Use Unix Timestamp Converter

  1. 1
    Choose a taskPick the direction.
  2. 2
    Enter a valueA timestamp, or a date as YYYY-MM-DDTHH:MM:SS.
  3. 3
    CopyCopy the date or timestamp.

Examples

Seconds timestamp
Input: 1767225600
Result: 2026-01-01T00:00:00.000Z (detected as seconds)
Milliseconds timestamp
Input: 1767225600000
Result: 2026-01-01T00:00:00.000Z (detected as milliseconds)
Seoul time → timestamp
Input: 2026-01-01T09:00:00, zone Asia/Seoul
Result: 1767225600 (seconds)

Common Use Cases

  • Reading when a timestamp in logs or a database happened
  • Making an expiry time for an API request

Frequently Asked Questions (FAQ)

My local time comes out hours off.

Choose your zone under "Zone" or add an offset such as +09:00 to the date. With UTC selected, the input is read as UTC.

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