Tesseract.js WASM OCR

Extract Text from PDF.

OCR PDF locally to extract text. No uploads, secure text recognition, instant results.Your documents never touch our servers. Total privacy via WebAssembly OCR.

Bank-Grade Privacy

Docs are decrypted and processed strictly within your browser's RAM.

Zero Latency

Skip the upload queue. WASM processing is up to 50x faster than traditional servers.

No Cloud Sync

We have no database. Your documents exist only while this tab is open.

End-to-End Encryption Active

Privacy

Local Worker

Execution

Off-Main Thread

Memory

Auto-Volatile

Mastering Extract Text

Follow our 100% private workflow. Since DocuStitch uses client-side logic, your document data never touches a remote server.

1

Upload PDF

Select the PDF document you want to extract text from. Our local OCR engine reads the file directly in your browser's memory.

2

Process with Tesseract.js

The Tesseract.js WASM engine analyzes each page and extracts text using advanced optical character recognition.

3

Copy or Download

Once extraction is complete, copy the text to your clipboard or download it as a text file. All processing was 100% local.

Why Private Processing?

Comparing DocuStitch vs. Standard Online PDF Tools

Security Benchmark 2026
DocuStitch (Local)
  • 0% Data leakage risk
  • WebAssembly RAM execution
  • Immediate session wipe
Others (Cloud)
  • Server-side caching
  • Unencrypted file transit
  • Data harvesting risks

How Local OCR Works

Tesseract.js WASM

We use Tesseract.js compiled to WebAssembly, running entirely in your browser. No server-side OCR processing.

Page-by-Page Analysis

The engine processes each PDF page individually, extracting text with high accuracy while maintaining document structure.

Instant Copy

Extracted text is immediately available to copy to your clipboard or download as a plain text file. No waiting for uploads or downloads.

Tesseract.js WASMClient-Side OCRLocal-FirstZero-Upload

DocuStitch OCR Engine • Tesseract.js Powered • docustitch.app

Professional PDF Text Extraction Without Privacy Compromise

Extracting text from PDF documents is essential for accessibility, data entry, and document analysis. However, most online OCR tools present a significant security risk. They require you to upload sensitive files—containing financial data, personal IDs, or medical history—to their servers. DocuStitch eliminates this risk.

Our tool uses Tesseract.js compiled to WebAssembly (WASM) to perform OCR directly in your browser. When you upload a file, it never leaves your device. The Tesseract.js engine analyzes each page, identifies text regions, and extracts characters using advanced pattern recognition. This ensures your documents remain 100% private and the process is dramatically faster than cloud-based alternatives.

Our OCR engine supports multiple languages and can handle complex layouts including tables, columns, and multi-column documents. The extracted text maintains the original document structure for easy post-processing.

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Tesseract.js WASM

The entire OCR engine runs inside your browser using near-native WebAssembly performance.

Privacy Focused

Zero records. Zero logs. Zero uploads. Your sensitive documents stay exactly where they belong: on your machine.

Multi-Language Support

Supports 100+ languages including English, Spanish, French, German, Chinese, Japanese, and more.

Instant Results

Since there is no network transfer for the raw file, OCR processing starts and finishes in a fraction of the time.

Frequently Asked Questions

Everything you need to know about OCR PDF

How accurate is the OCR extraction?
Tesseract.js provides high accuracy for printed text (90-95% for clear documents). Handwriting recognition is more challenging but supported for basic recognition.
Can I OCR password-protected PDFs?
Yes, if you know the password. You'll need to unlock the PDF first using our Protect PDF tool, then use OCR on the unlocked document.
What languages are supported?
Tesseract.js supports 100+ languages. We automatically detect the document language or you can specify it manually for better accuracy.
Is there a file size limit?
No. Unlike cloud tools that limit you to 50MB, DocuStitch can handle 500MB+ files because it uses your local system's resources rather than server bandwidth.

Stop Uploading. Start Processing Locally.

Join thousands of professionals who trust DocuStitch for mission-critical PDF operations without the risk of cloud leaks.