Why does ı map to i and not stay unchanged?

The dotless ı is a distinct Turkish letter. Its natural ASCII fold is i. Many generic tools leave it untouched or get it wrong because Unicode normalization does not treat ı as a decorated i, so we map it explicitly.

How is the dotted capital İ handled?

Uppercase İ maps to plain I in ASCII. This mirrors the lowercase mapping ı to i and keeps the output consistent with Turkish casing conventions.

What exactly gets replaced?

The six Turkish letters and their uppercase forms: ç/Ç to c/C, ğ/Ğ to g/G, ı to i and İ to I, ö/Ö to o/O, ş/Ş to s/S, and ü/Ü to u/U. All other characters pass through unchanged.

Is this good for making URL slugs?

Yes. Folding Turkish characters to ASCII is a common first step for slugs and filenames. After running this tool you can lowercase and replace spaces with hyphens to finish the slug.

Does it use Unicode NFD normalization?

No. NFD does not decompose ı, ğ, or ş into base plus accent, so it would miss them. This tool uses an explicit Turkish-aware character map to guarantee correct results.

Turkish Diacritic Remover

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Fold Turkish text to clean ASCII

Removing diacritics from Turkish is harder than it looks. Standard Unicode normalization (NFD) decomposes letters like é into e plus an accent, but Turkish letters such as ı, ğ, and ş are not decorated base letters — they are distinct code points. As a result, naive ASCII-folding code silently leaves them in place. This tool uses an explicit Turkish-aware map so every special character is converted correctly.

How it works

Each character is looked up in a fixed mapping table and replaced if it matches:

ç -> c    Ç -> C
ğ -> g    Ğ -> G
ı -> i    İ -> I
ö -> o    Ö -> O
ş -> s    Ş -> S
ü -> u    Ü -> U

Everything else — ordinary Latin letters, digits, punctuation, spaces — passes through unchanged. The two trickiest cases are the dotless ı, which folds to i, and the dotted capital İ, which folds to I.

Example

input:  Çağrı İstanbul'da güneşli bir öğle yaşıyor
output: Cagri Istanbul'da gunesli bir ogle yasiyor

Tips and notes

Use this before generating URL slugs, filenames, or legacy-system identifiers that must be ASCII-only.
Because the mapping is explicit, it does not depend on locale or normalization quirks across browsers.
All conversion happens locally in your browser, so the text stays private.