The Pain Point of Scanned Documents: Visible but Not Searchable
Contracts, invoices, and books scanned into PDFs are essentially images. You can see the text, but you can't select, copy, or search it. Finding a specific sentence means flipping through pages one by one, which is extremely inefficient. OCR (Optical Character Recognition) technology solves this problem—by "reading" the text in images and turning it into editable text.
What OCR Can Do
- Searchable: Use Ctrl+F to directly find keywords
- Copyable: Select text and copy it elsewhere
- Editable: Convert to Word or TXT for further editing
- Retrievable: Can be indexed after importing into knowledge bases or document management systems
Using the DocsAll PDF OCR Tool
The PDF OCR Recognition tool supports Chinese and English recognition, with files never uploaded to a server:
- Open the OCR tool and upload a scanned PDF
- Select the recognition language (Chinese/English/Mixed Chinese-English)
- Click "Start Recognition"
- After recognition completes, copy the text or download it
Tips to Improve Recognition Accuracy
- Source file clarity: Scans at 300 DPI or above produce the best results
- Correct orientation: Rotate tilted or upside-down pages with Rotate before recognition
- Page-by-page processing: Split oversized files and recognize segment by segment to avoid running out of memory
- Proofread key information: Numbers, punctuation, and rare characters are error-prone; always manually verify important content
How to Use OCR Results
The recognized text can be copied directly, or further processed with other tools:
- Convert to Word for editing: Use PDF to Word (if the PDF is already text-based)
- Extract key pages: Use Extract Pages first, then OCR, to reduce processing load
Limitations
OCR is not omnipotent. Recognition rates drop noticeably for handwriting, complex tables, low-resolution images, and artistic fonts. For legal, financial, and other high-accuracy requirements, manual proofreading after recognition is mandatory.
Turning scanned documents into editable text is a key step in digital office work. DocsAll's OCR tool processes locally, making it suitable for scanned documents containing private information.