🛠️Utility Hub
💬Feedback
🏠 Home

PDF OCR Converter

Convert scanned contracts, official documents, and faxed files into searchable PDFs. 100% client-side — files never leave your browser. PC recommended.

📄

Drag & drop or click to upload PDF

Supports: PDF / Max 100MB

💡 Best use cases

✅ Works well

✅ Scanned contracts, official documents, invoices
✅ Faxed documents
✅ Text-heavy scanned materials
✅ Parts lists and material tables

⚠️ Lower accuracy expected

⚠️ Complex CAD drawings with overlapping lines and text
⚠️ Dense engineering drawings with dimension lines
⚠️ Documents with mixed handwriting
⚠️ Low-resolution scans (below 150dpi)

⚡ Processing time

• ~10–30 seconds per page (depends on PC performance)
• PC recommended (mobile limited to 10 pages)

🔒 Privacy protection

• Files never leave your browser
• All processing is done entirely client-side

⚠️ Important notices before use

[Accuracy]

OCR accuracy is 95–99% for clean printed text. Accuracy drops significantly for drawings with overlapping lines, low-resolution scans, or handwriting.

[File size]

The converted file will be larger than the original because every page is stored as a JPEG image. (e.g., 2MB original → ~10–30MB converted)

[Important documents]

Conversion results are for reference only. Always verify important content against the original document.

이 도구를 친구에게 공유하기

AD

What is PDF OCR Converter?

PDF OCR Converter transforms image-only PDFs — scanned contracts, official documents, and faxed files — into fully searchable PDFs where you can use Ctrl+F to find any text instantly. It works by using pdf.js (Mozilla) to render each PDF page as a canvas image, Tesseract.js (Google OCR engine) to extract text and coordinates with confidence scoring, and jsPDF to overlay an invisible searchable text layer on top of the original image. The original image quality is completely preserved. Multi-language support includes Korean, English, Japanese, and Chinese. All processing happens entirely in your browser — files are never uploaded to any server, making it safe for confidential contracts and personal documents. OCR accuracy reaches 95–99% for clean printed text. Mobile devices are limited to 10 pages due to memory constraints; PC use is strongly recommended for large documents.

Common Use Cases

📄
Searchable contracts & official docs
Convert faxed or scanned contracts and official documents into searchable PDFs. Find specific clauses, dates, or amounts instantly with Ctrl+F, dramatically improving document management efficiency.
🧾
Invoice & receipt digitization
Turn scanned invoices and receipts into searchable PDFs. Quickly locate vendor names, amounts, and dates by keyword — speeding up accounting and tax document workflows.
📚
Document archive modernization
Convert old scanned paper documents stored as image-only PDFs into searchable digital archives. The original image quality is fully preserved while adding full-text search capability.
📋
Parts lists & material tables
Search parts lists, material schedules, and bill-of-materials PDFs where text and lines are cleanly separated. Find specific part names or specifications in seconds.

How to Use

  1. 1
    Upload PDF
    Upload the PDF you want to convert. Drag and drop it onto the upload area, or click to open the file picker. Maximum 100MB, PDF format only. Mobile browsers are limited to 10 pages.
  2. 2
    Set options
    Choose your OCR language and rendering quality. For documents containing Korean, select "Korean + English." The recommended quality setting is "High Quality (2.0×)." The estimated output file size is shown after upload.
  3. 3
    Start conversion
    Click the "Convert to Searchable PDF" button. Conversion may take several minutes depending on the page count. Do not close the browser tab during processing — real-time progress is displayed.
  4. 4
    Download and verify
    The searchable PDF downloads automatically when done. Open it in Adobe Reader or any PDF viewer and press Ctrl+F to search. Note that the converted file will be larger than the original.

Frequently Asked Questions