Date Format Converter

Convert date and time into YYYY-MM-DD, ISO 8601, UTC, and Unix timestamp formats.

Category: Converters

When to use?

Use it to convert a local date to the ISO 8601 format an API requires, or to check the same date in several notations.

How to use

  • Enter a date and time.
  • See it converted to YYYY-MM-DD, ISO 8601, UTC, Unix timestamp, and more.
  • Copy the format you need.

Input Explanation

Enter the reference date and time (e.g. 2024-05-13 14:00) or pick via the calendar control.

Calculation Basis

Input is in your browser local time; ISO 8601 and UTC results are shown in UTC. Unix timestamp is provided in both seconds and milliseconds.

Usage Examples

  • Check an API date format - Convert a local date to ISO 8601 or Unix timestamp.
  • Tidy dates for documents - Check the same date in YYYY-MM-DD, UTC, and other notations.
  • Standardize log times - Unify differently formatted dates into a standard like ISO 8601.

Examples

  • May 13, 2024 2 PM → ISO 8601: "2024-05-13T05:00:00.000Z" (from KST)
  • Unix timestamp 1700000000 → shown as ISO 8601, UTC, and local time

Cautions

  • Malformed source data can cause parsing errors or broken output.
  • A mismatched encoding standard or complex nested data may break or drop the structure.

Guides

Date format types

There are many formats: ISO 8601 (YYYY-MM-DD), US (MM/DD/YYYY), and more. Unifying formats matters for international projects and API integration.

Format string reference

YYYY is a 4-digit year, MM a 2-digit month, DD a 2-digit day. Format tokens differ by language/library (e.g. moment.js vs. date-fns), so check your environment.

FAQ

How are time zones applied?

Input is your browser local time; ISO and UTC results are shown in UTC.

Can I see a Unix timestamp?

Yes, both seconds and milliseconds are provided.

What is ISO 8601 format?

The international standard date/time notation YYYY-MM-DDTHH:mm:ss, widely used in APIs.

What if I enter an invalid date?

An unrecognized date format is not converted and is shown as an error.

Related Tools

  • Timestamp Converter - Convert Unix timestamps to readable dates and dates back to Unix timestamps.
  • Unix Millisecond Converter - Auto-detect 10-digit second and 13-digit millisecond timestamps and convert to date/time.
  • Time Zone Converter - Convert a chosen date and time to another time zone's representation.
  • World Clock Converter - Convert a given date and time to the local time of major cities and time zones at once.
  • URL Encode / Decode - Encode text into URL-safe form (%XX) or decode an encoded URL back to text.
  • Base64 Converter - Encode text to Base64 or decode a Base64 string back to text.