Remove Accents (Diacritics Remover)

Accents and other diacritics are essential in many languages, but some systems still choke on them: old databases, file names, URLs, usernames, email addresses, CSV imports and search indexes. This tool turns é into e, ñ into n and ü into u, converts letters that have no separate accent (ß, æ, ø, ł, đ, þ) into their usual ASCII spelling, and leaves non-Latin scripts such as Korean, Hindi or Arabic exactly as they are.

How to use this tool

1. Paste the text.
2. Keep “also convert ß, æ, ø …” on for fully plain letters, or turn it off to change only accented letters.
3. Use the German option to write ä, ö and ü as ae, oe and ue, as in names and addresses.
4. Copy the result; the note shows how many letters changed.

Formula

Plain text = NFC(remove combining marks from NFD(text)) for Latin and Greek letters

Unicode can write é either as one character or as e followed by a combining acute accent. Canonical decomposition (NFD) splits every accented Latin or Greek letter into its base letter and its marks; the marks are removed and the text is recomposed (NFC). Because only marks that follow a Latin or Greek letter are removed, Hangul syllables, Devanagari vowel signs, Thai tone marks and Arabic vowels are untouched. Letters such as ß or ø are separate letters, not letters with an accent, so a small table converts them; a capital becomes two capitals before another capital (ÄRGER → AERGER) and a capital and a small letter before lower case (Æsir → Aesir).

Example

“Crème brûlée à la française, São Paulo, Ærøskøbing, Łódź, Straße, Ελληνικά” becomes “Creme brulee a la francaise, Sao Paulo, Aeroskobing, Lodz, Strasse, Ελληνικα” and “한글” stays as it is. With the German option, “Müller” becomes Mueller instead of Muller.