Free Online AI OCR in 2026: PaddleOCR (87k Stars), Tesseract and EasyOCR Compared - Extract Text from Images and PDFs

PaddleOCR (87,007 stars), Tesseract (75,756) and EasyOCR (29,868) are the three big open-source OCR engines - here is which to use for Chinese text, scanned PDFs and handwriting.

💡 What You Will Learn

PaddleOCR (87,007 stars), Tesseract (75,756) and EasyOCR (29,868) are the three big open-source OCR engines - here is which to use for Chinese text, scanned PDFs and handwriting.

📜 Table of Contents

• The short answer
• Quick start - PaddleOCR (best for Chinese)
• Which engine for which job
• Real numbers
• FAQ

The short answer

PaddleOCR (87,007 stars, Apache-2.0) from Baidu is the best free engine for Chinese and mixed-language text - its PP-OCRv4 models top most commercial SDKs on Chinese benchmarks. Tesseract (75,756 stars, Apache-2.0) is the veteran: 100+ languages, but weaker on Chinese than PaddleOCR. EasyOCR (29,868 stars, Apache-2.0) is the easiest Python API with 80+ languages built on deep learning.

Quick start - PaddleOCR (best for Chinese)

pip install paddlepaddle paddleocr

from paddleocr import PaddleOCR
ocr = PaddleOCR(use_angle_cls=True, lang='ch')   # Chinese + English
result = ocr.ocr('receipt.jpg', cls=True)
for line in result[0]:
    print(line[1][0], line[1][1])   # text + confidence

Which engine for which job

Real numbers

• PaddleOCR PP-OCRv4: ~90%+ accuracy on standard Chinese scene-text benchmarks.
• Tesseract handles clean printed English at ~95%+; drops quickly on photos and complex layouts.
• EasyOCR on CPU processes a typical receipt image in 2-5 seconds.

FAQ

Q: How do I OCR a PDF? A: Convert pages to images with PyMuPDF (10,400 stars), then run OCR per page. Or use OCRmyPDF which wraps Tesseract for PDFs directly.

Q: Is there a free online OCR service? A: Yes - Google Lens, and open-source web UIs built on these engines. For private documents, self-host: these engines all run locally.

❓ FAQ

How do I OCR a PDF?

Convert pages to images with PyMuPDF (10,400 stars), then run OCR per page. Or use OCRmyPDF which wraps Tesseract for PDFs directly.

Is there a free online OCR service?

Yes - Google Lens, and open-source web UIs built on these engines. For private documents, self-host: these engines all run locally.