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Date Format Converter

Convert dates between the most common formats (YYYY-MM-DD, MM/DD/YYYY, DD/MM/YYYY), ISO 8601, and Unix timestamp, with automatic detection of the input format. Everything is calculated in your browser, with no data sent to a server.

How it works

  1. Type or paste the date you want to convert (or use the built-in example).
  2. Choose the input format, or leave it on 'Auto-detect' so the tool identifies it for you.
  3. Select the output format you want, including ISO 8601 or Unix timestamp.
  4. The result updates instantly as you change the date or the formats.
  5. Copy the result with one click.

Use cases

  • Convert a form date (DD/MM/YYYY) into the ISO 8601 format an API expects.
  • Turn a Unix timestamp stored in a database into a readable date.
  • Adapt dates exported from a spreadsheet to the format another system needs.
  • Quickly check what date a specific Unix timestamp corresponds to.

Frequently asked questions