OCR for Japanese, Korean, and Traditional Chinese: Language Settings That Matter

Quick answer: Language selection decides everything in CJK OCR. DocsAll PDF OCR supports Japanese, Korean, Traditional Chinese and 10+ options via tesseract language packs — pick the matching combination (Japanese+English for Japanese documents) or recognition fails wholesale. Open PDF OCR — everything runs locally in your browser, and files never leave your device.

Steps

1. Match the language option to the document: Japanese+English, Korean+English, or Traditional Chinese+English.
2. For mixed-script documents, use the combined option, never the single-language one.
3. Simplified/Traditional mixing: choose the "Simplified+Traditional Chinese+English" option.
4. Run a single page first to validate before committing to a batch.

Important notes

• CJK recognition is harder than Latin: thousands of characters, lookalike glyphs (Japanese 査/Chinese 查), and font sensitivity (Mincho vs Gothic matters).
• Vertical text layout is not preserved — output is line-by-line text; verify reading order manually.
• DocsAll OCR outputs plain text without formatting, for all languages.

Common questions

Japanese text comes out with Chinese variants The Japanese model sometimes picks Chinese simplified forms inside kanji context — confirm the language is Japanese+English, not Simplified Chinese.

How good is Korean OCR? Workable for modern Hangul; old documents mixing Hangul and Hanja have limited accuracy — proofread section by section.