What marks does this remove?

It removes the monotonic accent (τόνος), the single acute mark used in modern Greek, and the diaeresis (διαλυτικά), the two dots used to show a vowel is pronounced separately. ά becomes α, ή becomes η, and ϊ becomes ι.

Does it keep the letters themselves?

Yes. Only the diacritic marks are stripped; the underlying vowel letter and its case are preserved. So Ά becomes Α and ΰ becomes υ, with every consonant left untouched.

Why remove Greek accents?

Unaccented Greek is useful for case-insensitive search and matching, for URL slugs and filenames that should avoid special characters, and for comparing two strings that differ only in accentuation. Greek search engines and databases often fold accents this way.

Does it handle the combined accent-plus-diaeresis?

Yes. The forms ΐ and ΰ carry both a tonos and a diaeresis. The tool removes both marks at once, so ΐ becomes ι and ΰ becomes υ in a single pass.

Is anything sent to a server?

No. The normalization uses Unicode decomposition entirely in your browser, so your text never leaves your device.

Greek Tonos/Diaeresis Remover

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Modern Greek uses two diacritics: the τόνος (a single acute accent marking the stressed syllable) and the διαλυτικά (diaeresis, two dots showing a vowel is pronounced on its own). For search, sorting, slugs, or comparison you often want the bare letters. This tool strips both marks.

How it works

The tool relies on Unicode normalization. It decomposes each character into its base letter plus separate combining marks (NFD form), removes the combining tonos and diaeresis code points, and recombines:

"ά"  → "α" + ́  → remove ́  → "α"
"ϊ"  → "ι" + ̈  → remove ̈  → "ι"
"ΐ"  → "ι" + ̈ + ́ → remove both → "ι"

Because it targets only the accent and diaeresis combining marks, the base vowel, its case, and every consonant are preserved exactly. Punctuation, Latin characters, numbers, and spacing pass through unchanged.

Tips and example

Καλημέρα becomes Καλημερα; προϊστάμενος becomes προισταμενος.
The result is ideal as a normalized search key: a user typing αθηνα then matches Αθήνα after both are stripped and case-folded.
For URL slugs, combine this with lowercasing and a transliteration step so the final slug is plain ASCII.
Stripping accents is not the same as transliteration — the text stays in Greek letters, just without the marks.