Searchable PDF OCR Generator
Transform scanned PDFs into fully searchable selectable documents with client-side invisible text layers and OCR bounding box mapping.
Choose or Drag & Drop Scanned PDF
Compatible with standard PDF scans and multi-page documents
100% Client-Side Private OCRscanned-document.pdf
0 KB · Scanned Document · 0 Pages
Image Preprocessing Enhancements:
Interactive OCR Inspector & Verification
Page 1
0 Words
0% Avg Conf
0 Pages
≥90% Good
70-89% Medium
<70% Low
Extracted text stream will appear here after OCR processing.
How to Use This Tool
Follow these quick and straightforward steps to convert any scanned document into a searchable PDF.
1
Upload Scanned PDF
Drag and drop your scanned document or click the upload area to load the PDF into your browser.
2
Configure OCR Engine
Choose the document language, render scale, preprocessing filters, and specific pages to recognize.
3
Test Searchability
Type queries into the search tester to see recognized words highlighted in green on the canvas.
4
Download Searchable PDF
Export your final PDF with embedded invisible vector text or download extracted plain text.
Frequently Asked Questions
Learn how client-side optical character recognition and invisible text layer embedding function.
How does the invisible text layer make scanned PDFs searchable?
The generator embeds an invisible vector text layer directly above the original raster page scan. Using exact word bounding boxes, PDF readers allow users to select, copy, and search words with keyboard shortcuts like Ctrl+F while preserving the original document image.
Are my scanned PDF documents safe and confidential?
Yes, your documents remain strictly confidential. All optical character recognition is performed on your device inside your web browser using WebAssembly. No files, pages, or recognized text are ever uploaded to an external server or remote storage.
How does preprocessing improve OCR on low-quality scans?
Built-in high-contrast binarization and despeckle denoise filters remove scan artifacts, background shadows, and paper bleed-through. Cleaning pixel variance before running character recognition increases word accuracy on faded or historical documents.
Is the generated searchable PDF compatible with Adobe Acrobat and Chrome?
Yes, the generated files comply fully with ISO standard PDF specifications. The resulting PDF files can be opened, highlighted, searched, and annotated across Adobe Acrobat Reader, Google Chrome, Mozilla Firefox, Apple Preview, and mobile PDF applications.
Can I process specific pages instead of an entire book?
Yes, you can specify individual page numbers or ranges like 1-3, 5. This targeted processing saves device memory and lets you extract text quickly from relevant sections of large documents.
Processing OCR
Initializing Tesseract OCR engine...