Tesseract.js WASM OCR

Tesseract.js OCRBrowser-side processingReviewable text workspace

Extract text from PDF in your browser.

Recognize text in scanned pages and export searchable output. OCR runs in your browser session, with reviewable text and searchable PDF output.

Input
Scanned PDF
Runtime
Tesseract.js
Output
Text + PDF
OCR PDFPDF to WordPDF to ExcelCompress PDF

Drop a scanned PDF for OCR

Pages render locally, Tesseract.js reads the text, and the result exports as both searchable PDF and plain text.

Local processing · up to 50MB per file
How to use OCR PDF
  1. 01

    Choose PDF

    Select the PDF you want to extract text from. The file is read in your browser memory.

  2. 02

    Process with Tesseract.js

    Each page is rendered in-browser, recognized with Tesseract.js, and mapped into a searchable PDF output.

  3. 03

    Review and download

    After OCR completes, review the extracted text, copy it, download it as TXT, or save the searchable PDF.

OCR should expose what is happening instead of hiding behind a magic button.

Tesseract.js WASM

Tesseract.js runs in WebAssembly directly in your browser rather than on a remote OCR server.

Page-by-page analysis

Each page is rasterized locally before OCR so scanned PDF pages can be recognized reliably.

Reviewable output

The OCR pass returns text you can inspect, copy, download as TXT, or save into a searchable PDF.

Privacy first

OCR runs locally in your browser session, reducing the need to send sensitive documents to a remote OCR service.

Fast start

Processing starts after file selection and uses your device resources instead of a remote queue.

Browser sandbox

The OCR engine runs in an isolated browser context tied to your current session.

Tesseract.js WASMClient-side OCRLocal-firstZero-upload

DocuStitch OCR Engine - Tesseract.js workflow - www.docustitch.app

Create searchable PDFs in a local OCR workflow

OCR is useful for making scanned documents searchable without pushing them through a remote processing queue. DocuStitch keeps the workflow local for standard use.

This tool uses Tesseract.js compiled to WebAssembly (WASM) together with local PDF page rendering, so scanned PDF pages are processed page by page inside your browser session.

You can now review extracted text, copy it, download a TXT file, and save a searchable PDF from the same OCR pass.

Tesseract.js WASM

OCR runs in-browser with WebAssembly performance.

Privacy focused

For standard workflows, no third-party upload step is required.

Searchable output

Download a searchable PDF and a plain-text export from the same OCR run.

Fast results

OCR starts immediately without waiting on a remote upload queue.

Frequently asked questions about OCR PDF
What does the OCR tool download today?

The route can now return both a searchable PDF and a plain-text export, all generated locally in the browser.

Can I OCR password-protected PDFs?

Yes, as long as you can unlock the file first with the correct password.

Does this already provide a plain-text workspace?

Yes. After OCR finishes, you can review the extracted text on the page, copy it, or download it as TXT before saving the searchable PDF.

Is there a file size limit?

Practical limits depend more on device memory than on cloud upload caps since processing happens locally.