Free Online Date Format Converter

The Tooloogle Date Format Converter takes any date you pick and instantly shows it in DD/MM/YYYY, MM/DD/YYYY, YYYY-MM-DD, DD.MM.YYYY, ISO 8601, and 20+ other formats — side by side, with a one-click copy button on each. Need an exotic format we don't list? Type your own pattern (``YYYY-Www-D``, ``ddd, MMM Do YYYY``, ``DDMMMYY``, anything dayjs supports) into the custom-format field and the conversion appears beneath it. Useful when filling out forms that demand a specific format (``DD-MM-YYYY``, ``MM/DD/YY``, ``DDMMYY``), when porting data between systems with different conventions (US vs. Europe vs. ISO), when normalizing date columns in a CSV, or simply when you can never remember whether your boss wants a slash or a dash this week.

What It Does & How It Works

Pick a date with the calendar control at the top — or type one in directly. The converter feeds the date through ``dayjs``, a tiny battle-tested date library, and renders it in every preset format on the page. Each result row has a copy button so you can grab the format you need without re-typing. The custom-format box at the top of the grid lets you build any format string from dayjs tokens; the live preview next to it updates as you type, and a copy button is provided there too. Your custom format is remembered in ``localStorage``, so the next time you open the page your preferred format is already filled in.

Features

21 preset formats — covers DD/MM/YYYY, MM/DD/YYYY, YYYY-MM-DD, DD.MM.YYYY, ISO formats, plus YY/MM/DD, DDMMYY, MMMDDYY, MMM D YYYY, and many more.
Custom format builder — type any dayjs format string for instant output (``YYYY-MM-DDTHH:mm:ss``, ``ddd, MMM Do YYYY``, ``[Quarter] Q [of] YYYY``, etc.).
Custom format remembered — your last-used custom format is saved in ``localStorage`` and pre-filled on next visit.
One-click copy — every formatted result has a copy button.
Live updates — change the date and every format updates simultaneously; type in the custom format and its preview updates as you go.
Browser-only — runs locally; no upload, no analytics on your dates.
SSR-friendly — the page renders meaningful content for crawlers even before JavaScript executes.

How to Use the Date Format Converter

Pick a date with the calendar input at the top. The default is today's date.
Read the formatted versions — every preset format appears below in a two-column grid: format on the left, formatted value on the right.
Copy the format you need with the copy button next to the value.
(Optional) Type a custom format in the box at the top of the grid. The live preview appears next to the input. The format string follows dayjs tokens (``YYYY``, ``MM``, ``DD``, ``HH``, ``mm``, ``ss``, ``ddd``, ``MMM``, ``Do``, etc.).
Your custom format is saved for next time — refresh and it's still there.

Common Date Format Use Cases

Filling out government, banking, or medical forms that demand a specific date format (date of birth in ``DD-MM-YYYY``, expiration in ``MM/YY``, ISO ``YYYY-MM-DD`` for an API request body). Filling out US visa applications and tax forms that want ``MM/DD/YYYY`` when your local convention is ``DD/MM/YYYY``. Filling out European forms that want ``DD/MM/YYYY`` or ``DD.MM.YYYY`` when your default is ``MM/DD/YYYY``. Renaming files and folders with a leading sortable date (``YYYY-MM-DD-report.pdf``). Generating database query parameters that demand ISO format. Preparing import-ready CSV columns where the spreadsheet must be in ``YYYY-MM-DD`` for a database load to interpret the column as a date. Resolving the ambiguity in a date like ``05/06/2026`` — is that May 6th (US) or June 5th (Europe)? — by pasting it into both ``MM/DD/YYYY`` and ``DD/MM/YYYY`` slots and seeing which one matches your intent. Generating filename-friendly dates without slashes. Producing log-line-friendly dates (``2026-05-06T14:30:00``). Generating headline dates for blog posts (``May 6th, 2026``). Cross-checking a date written in DDMMMYY format on an old document.

DD/MM/YYYY vs. MM/DD/YYYY — Which Format Is Standard?

There is no single global standard, only regional conventions:

DD/MM/YYYY (day first) is dominant in the UK, India, Australia, most of Europe, most of Africa, most of South America, and the rest of the Commonwealth. Example: 6th May 2026 written as ``06/05/2026``.
MM/DD/YYYY (month first) is dominant in the United States and a handful of other countries. Example: same date written as ``05/06/2026``.
YYYY-MM-DD (year first, ISO 8601) is the international standard for unambiguous machine-readable dates — recommended for filenames, log files, JSON payloads, database queries, and any context where two humans from different regions might disagree on a numeric-only date. Example: same date as ``2026-05-06``.
DD.MM.YYYY (dots) is the dominant European calendar style in Germany, Russia, and several Eastern-European countries.

If you're writing a date for an international audience and the format isn't fixed by the form/system, prefer ``YYYY-MM-DD`` or write the month name in full (``6 May 2026``) to remove ambiguity entirely.

Custom Format Token Reference

The custom format box accepts any dayjs format token. The most useful tokens:

``YYYY`` — 4-digit year (2026); ``YY`` — 2-digit year (26).
``MM`` — 2-digit month (05); ``M`` — 1- or 2-digit month (5); ``MMM`` — short month name (May); ``MMMM`` — full month name (May).
``DD`` — 2-digit day (06); ``D`` — 1- or 2-digit day (6); ``Do`` — ordinal day (6th).
``HH`` — 24-hour hour (14); ``hh`` — 12-hour hour (02); ``mm`` — minutes; ``ss`` — seconds; ``A`` — AM/PM; ``a`` — am/pm.
``ddd`` — short weekday (Wed); ``dddd`` — full weekday (Wednesday).
Square brackets escape literal text: ``[Year] YYYY`` → ``Year 2026``.

Best Practices & Tips

Use ISO 8601 (``YYYY-MM-DD``) for any date you store, sort, or transmit programmatically — it's the only format that sorts correctly as a string. Use ``MMM`` (short month name) instead of ``MM`` whenever a date is meant for human eyes — ``6 May 2026`` is unambiguous; ``06/05/2026`` is not. When filling a form, always read the example placeholder text rather than guessing the expected format. When designing your own forms, label fields explicitly (``DD/MM/YYYY``) instead of relying on the user's locale. For filenames, the order ``YYYY-MM-DD`` puts the year first so files sort chronologically when listed alphabetically. For database columns, store as a proper ``DATE`` or ``DATETIME`` column type, not a string — format only at display time. Watch out for two-digit-year ambiguity (``YY``) — ``26`` could be 1926, 2026, or 2126; always store and transmit four-digit years.

Privacy & Browser-Based Processing

The Tooloogle Date Format Converter runs entirely in your browser using ``dayjs``, a 7KB JavaScript library. The dates you enter are not uploaded; only your last-used custom format string is stored locally in ``localStorage``. Verify with DevTools that no requests fire as you change the date. The page also renders a meaningful default (today's date in every format) on the server so the formatted dates are visible to search-engine crawlers and to users on slow connections before JavaScript loads.

Why Choose Tooloogle's Date Format Converter?

Tooloogle's converter shows you every common format at once — instead of forcing you to switch between "DD/MM/YYYY" and "MM/DD/YYYY" and "YYYY-MM-DD" pages, you get all 21 in one view, each with a one-click copy button. The custom-format builder covers any dayjs token combination for the rare formats not in the preset list, and your last-used custom format is remembered. Browser-only processing keeps your dates private and the tool fast. SSR rendering means the formatted dates show up immediately on page load — no "Loading..." placeholder. Bookmark the page next to your form-filling browser, your spreadsheet, or your database client. Pair the converter with the Tooloogle Days Between Dates calculator when you need a date arithmetic, the Date Calculator when you're adding/subtracting days, and the Age Calculator for date-of-birth math.

DD/MM/YYYY, MM/DD/YYYY Date Format Converter Online