Date Format Converter

Free online date format converter. Convert between ISO 8601, Unix timestamps, US/EU date formats, and more. Calculate date differences in real-time. No registration required.

Zero dependency · Works offline

Date Format Converter is a free online tool supporting ISO 8601, Unix timestamps (seconds/milliseconds), US dates (MM/DD/YYYY), EU dates (DD/MM/YYYY), RFC 2822, relative time, and more. Auto-detects input format and outputs all formats at once. Ideal for developers, international communication, and data migration.

FAQ

What date formats are supported?

ISO 8601 (YYYY-MM-DD), Unix timestamps (seconds & milliseconds), US dates (MM/DD/YYYY), EU dates (DD/MM/YYYY), RFC 2822, relative time, and more.

How to distinguish US vs EU dates?

The tool auto-detects. Values > 12 trigger automatic recognition (e.g. 13/07/2026 → EU format). You can also manually select the format.

Does it support timezones?

Currently uses browser local timezone. UTC can be toggled in display options.

Is the timestamp in seconds or milliseconds?

Auto-detected. 10-digit = seconds, 13-digit = milliseconds.

Is my data safe?

All computation happens locally. No data is uploaded.

📅 Date Format Converter