Turkish OCR Guide — Extract Text from Türkçe PDFs & Images

Turkish uses a Latin-based alphabet, but its dotted and dotless i characters are a classic source of OCR errors. The difference between "İstanbul" and "Istanbul" is not a font choice; it is a spelling rule, and a generic OCR engine that ignores the Turkish i will produce incorrect text.

This guide explains how to extract accurate Turkish text from scanned documents and images while preserving the unique Turkish alphabet.

Why Turkish OCR Has Unique Requirements

The Turkish alphabet has two versions of the letter i, plus additional characters that do not exist in English.

• Dotted İ/i and dotless I/ı are four distinct letters in Turkish.
• Letters ç, ğ, ş, ö, and ü need correct recognition.
• A missing diacritic can turn one Turkish word into another.
• Mixed Turkish-English text can confuse engines that do not expect Turkish characters.
• Some fonts render ğ with a longer descender, making it easy to confuse with g.

How FastOCR Solves Turkish OCR

FastOCR applies a Turkish glyph model that treats İ, I, ı, and i as separate letters and preserves all Turkish diacritics.

• ✅ Turkish i handling — Dotted and dotless i variants are kept distinct.
• ✅ Extra letters — ç, ğ, ş, ö, and ü are recognized correctly.
• ✅ Diacritic preservation — Missing marks are minimized on quality scans.
• ✅ Mixed text — Turkish and English coexist in one extraction pass.
• ✅ Mobile photos — Works on phone-captured documents and screenshots.

Best Practices for Turkish OCR

• Proofread the letters i, İ, ı, and I carefully after extraction.
• Check that ğ, ş, and ç were not confused with g, s, and c.
• Use 300 DPI scans to preserve the small marks on Turkish letters.
• For mixed Turkish-English pages, verify that each word kept its correct alphabet.
• Pay attention to capitalization of dotted and dotless i.

Popular Turkish OCR Use Cases

• Digitizing Turkish legal contracts and official government forms.
• Extracting text from Turkish academic papers and textbooks.
• Processing Turkish invoices, receipts, and financial documents.
• Converting Turkish news articles and screenshots into editable text.
• Archiving Ottoman Turkish texts in modern Latin transcription.

Frequently Asked Questions

Turkish OCR depends on getting the i letters and diacritics right. FastOCR preserves those details, giving you accurate, usable Turkish text from every scan.