PDF to Text OCR
Extract text from scanned PDFs with browser-based OCR
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Localized Intelligence for Secure Digitization
OCR usually represents a significant security risk because it requires 'reading' every word of your document. CleanPDF eliminates this risk by running the entire intelligence engine—Tesseract.js—locally in your browser tab. Your device handles the complex character recognition patterns, meaning your sensitive data is never exposed to an external AI API or cloud server. It is professional-grade digitization with 100% data sovereignty.
Everything You Need to Know About PDF OCR
Master our image-to-text technology. Learn why CleanPDF is the leading choice for secure document digitization.
🔒 How safe are my uploaded PDFs?
At CleanPDF, "uploading" doesn't mean sending files to a server. We use Tesseract.js and PDF.js to process your document 100% locally. Your sensitive data stays in your browser's memory and is never stored on our end. This makes it the most secure OCR tool for legal and financial paperwork.
Privacy Note: Unlike other "Cloud OCR" services that might use your scanned data to train their AI models, CleanPDF is a "Zero-Knowledge" platform. Your text stays on your machine.
🌍 Does CleanPDF support Unicode and Multilingual OCR?
Yes! Our OCR engine is trained on global datasets. It can accurately convert major European languages. Just select the correct language in the settings to ensure the highest character recognition accuracy.
📄 Why is 'High Accuracy' mode better for scanned documents?
Standard PDF text extraction often fails on low-resolution scans. Our "High Accuracy" mode renders pages at a significantly higher DPI before the OCR scan. This helps the system identify characters even in blurry or faint document scans, saving you hours of manual proofreading.
⚡ Is there a limit on how many PDF pages I can OCR?
No. Since the tool runs on your computer's hardware, we don't impose artificial page limits. However, for massive files, we recommend using the Page Range feature to extract text from 5-10 pages at a time to maintain optimal browser performance.