🔒 No server uploads · No watermark

OCR a PDF free

DukPdf's OCR PDF tool adds a searchable text layer to scanned PDFs, right in your browser. Pick a language, run OCR, and download a PDF where the scanned pages are now searchable and selectable. Free, with no server uploads and no watermark.

Open OCR PDF →

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A common scenario

You have a stack of scanned receipts in PDF and want to search by vendor name or amount instead of scrolling through image-only pages.

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Why privacy matters here

Scanned documents often contain PII, contracts, or financials. DukPdf runs OCR locally in your browser, so the scans never leave your device. See how local processing works.

✓ No watermark✓ Works offline✓ Open DevTools to verify

How to ocr a pdf free

Open the tool and add your file

Click the link below to open the tool in your browser. Drop in your PDF or click to select it. The file is read locally on your device.

Configure the operation

Pick a quality preset, page range, signature style, or whatever the tool needs. Every option runs in your browser — nothing is sent to a server.

Download the result

Click the action button. The result saves to your device. The original file is unchanged unless the tool explicitly modifies it.

Every step runs in your browser. No server uploads, no waiting.

OCR a PDF free — questions

How accurate is the OCR?

Tesseract.js, which DukPdf uses, achieves 95%+ accuracy on clean, high-resolution scans. Accuracy drops with low resolution, skewed pages, or unusual fonts. For best results, scan at 300 DPI and ensure pages are straight.

What languages are supported?

100+ languages including English, Spanish, French, German, Italian, Portuguese, Hindi, Arabic, Chinese, Japanese, and Korean. Pick the primary language of the document for best accuracy.

Can OCR handle handwritten text?

Limited. Tesseract is optimized for printed text. Handwriting recognition works for very clean block letters but struggles with cursive or messy writing. For handwritten documents, accuracy is significantly lower.

Is the PDF uploaded during OCR?

No. OCR runs in your browser using Tesseract.js. Open DevTools → Network tab and you will see zero upload requests while running OCR.

🔒 DukPdf — YOUR FILES NEVER LEAVE YOUR DEVICE

Ready to ocr a pdf free? Your files stay yours.

No server uploads. No watermark. Open the tool, drop your file, and download the result.