Vietnamese OCR — Extract Vietnamese Text From Any Image
Convert images containing Vietnamese into editable text with its diacritics intact. Because Vietnamese uses the Latin alphabet, letter recognition is straightforward — the real work is getting the marks right, and that's what the language hint helps with.
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All readable text from the image will appear here.
What Makes Vietnamese OCR Difficult
Vietnamese is the clearest case of a language where OCR gets the letters right and the meaning wrong. It uses a Latin alphabet, so segmentation is easy, but it layers two independent systems of marks onto vowels: quality marks that create distinct letters (ă, â, ê, ô, ơ, ư, đ) and tone marks stacked on top of those (acute, grave, hook, tilde, dot below). A single vowel can carry both, producing ế, ộ or ữ. Drop one mark and you get a different word entirely — ma, má, mà, mả, mã and mạ are six separate words. Generic OCR tuned for English routinely strips these to bare vowels, yielding text that reads as nonsense to a Vietnamese speaker.
Getting Accurate Vietnamese Results
- Check marks rather than letters when proofreading. The letters are almost always right; the tones are what fail.
- The dot-below tone (nặng) is the easiest to lose because it sits under the baseline — leave room below the line when cropping.
- Distinguish ơ/ư from o/u and â/ă from a in the output; the small horn and breve marks are frequent casualties.
- Avoid heavy compression and low contrast, which blur small marks into the vowel body.
Who Uses Vietnamese OCR
Documents and business
Extract text from Vietnamese invoices, contracts and official forms into an editable, correctly accented form.
Learners
Copy Vietnamese with correct tone marks off textbook pages and screenshots for study and lookup.
Travel
Pull text from menus, signs and labels so it can be pasted into a translator that needs accurate diacritics.
Vietnamese OCR — Frequently Asked Questions
Will tone marks be preserved?▼
That is the main thing this page is tuned for. Naming Vietnamese as the source language makes the model keep the stacked tone and vowel marks rather than flattening them to plain Latin vowels, which is what generic OCR tends to do.
Why do tone marks matter so much?▼
Because they distinguish words. Ma, má, mà, mả, mã and mạ are six different words with the same letters. Losing a mark doesn't just introduce a typo, it changes the meaning or makes the word nonexistent.
Is Vietnamese OCR more accurate than Chinese or Thai?▼
Letter recognition is more accurate because the alphabet is Latin and small. Overall accuracy depends on diacritics, so a low-resolution Vietnamese scan can end up less usable than a sharp Chinese one.
Does it handle đ correctly?▼
Yes, the barred đ is recognised as its own letter rather than as d. Verify it in proper nouns, where a wrong letter is more noticeable and less recoverable from context.
Need a Translation Instead?
This page extracts Vietnamese text as written. If you want the meaning in another language, the image translator reads the text and translates it in one step.
OCR in Other Languages
Or use the general image to text converter if your image contains several languages at once.