Drag & Drop PDF Files Here

or click to browse

Max files, MB each

OCR PDF – Free Online PDF OCR Converter

Convert scanned PDFs into searchable PDFs with an invisible text layer. Free OCR for PDF files 100+ languages, no upload, no signup. Learn how to OCR a PDF, make a scanned PDF searchable, and convert PDF to OCR text in seconds.

Searchable Output Invisible Text Layer Free & Secure 100+ Languages

What Is OCR for PDF?

OCR (Optical Character Recognition) is the technology that converts scanned images of text into machine-readable, searchable text. When you OCR a PDF, an invisible text layer is added on top of the scanned page image so the document looks identical but is now fully searchable, copyable, and indexable.

This process is essential when you have scanned PDFs or image-based PDFs. Without OCR, you can't search inside the document, copy text, or use it with screen readers. With OCR, you can:

  • Search inside scanned PDFs find any word instantly with Ctrl+F
  • Copy and paste text extract text from scanned books, contracts, or invoices
  • Archive documents properly make records searchable for future reference
  • Use accessibility tools screen readers can process the text layer
  • Index in document management systems companies use PDF OCR for DMS/ECM workflows
  • Convert PDF to Word or Excel with the text layer available, conversions work reliably

Our free tool OCRs PDF files online no upload to any server, no signup, no Adobe subscription. Just drop your PDF, pick the language, and click "Make Searchable PDF."

Key Features

Searchable PDF Output

Transform scanned image-based PDFs into fully searchable documents. The OCR text layer is embedded invisibly so you can search, copy, and index your documents.

100+ Language OCR

OCR engine supports Arabic, Chinese, English, French, German, Hindi, Japanese, Korean, Russian, Spanish, Urdu, and many more. Accurate text recognition for global documents.

Preserve Original Layout

The original PDF appearance is completely preserved. Images, formatting, and layout remain identical while the searchable text layer is added transparently.

Smart Font Embedding

Automatically selects the right font for your language. Uses Noto fonts for Arabic, Chinese, Japanese, Korean, Hindi, and more. Latin scripts use Helvetica.

Google Drive Integration

Connect your Google Drive to upload searchable PDFs directly. Files are organized in onlineocr.io/Pdf2Ocr folder. Auto-sync after processing.

Bulk ZIP Download

Process multiple PDFs and download all searchable versions as a single ZIP file. Batch processing with configurable concurrency for faster results.

How to OCR a PDF – Complete Guide

There are three common ways to OCR a PDF: using Adobe Acrobat, using our free browser-based OCR tool, or using our PDF to Text tool for plain-text extraction. Here's how each works.

Method 1: Use Our Free Online OCR Tool (Recommended)

Drop your PDF into the tool at the top of this page, select the document's language, and click "Make Searchable PDF." Our OCR engine (Tesseract.js) runs locally in your browser no upload to any server and produces a searchable PDF with an invisible text layer. The original page image stays exactly as it was. Download individual PDFs or all as ZIP.

Method 2: Use Adobe Acrobat Pro (Paid)

In Adobe Acrobat Pro DC: open your PDF, go to Tools → Scan & OCR → Recognize Text → In This File. Choose language and output settings, then click OK. Adobe saves the searchable PDF. Acrobat Pro requires a paid subscription ($12.99–$24.99/month). Adobe Reader cannot OCR it's a viewer only.

Method 3: Use Our PDF to Text Tool (Extract Text Only)

If you only need the text content (not a searchable PDF), use our PDF to Text tool instead. It extracts editable text you can copy, download as TXT, or open in Word. Use this when you want plain text; use the OCR tool on this page when you want the PDF to remain visually identical but become searchable.

Quick tip: If you're not sure whether your PDF is scanned or text-based, try selecting text with your mouse. If nothing highlights, it's a scanned/image PDF use OCR.

How to Make a PDF Searchable

1
Upload PDF

Upload your scanned PDF files by dragging & dropping or browsing. Supports up to 5 files with 25MB max each.

2
Select Language

Choose your document's language from 100+ options. The OCR engine uses this to optimize text recognition accuracy.

3
Make Searchable PDF

Click "Make Searchable PDF" to run OCR on all pages. An invisible text layer is added on top of each page image with precise word positioning.

4
Download & Use

Download individual searchable PDFs or all as ZIP. Upload to Google Drive, share, or use in any PDF reader with search capability.

Scanned PDF to Searchable PDF Explained

A scanned PDF is essentially a stack of images wrapped in a PDF container. You can view it, print it, but you can't search it or copy text. A searchable PDF is the same visual document with an invisible text layer underneath.

Scanned PDF

  • Contains only images no text data
  • Ctrl+F finds nothing
  • Copy-paste produces blank or garbled output
  • Screen readers can't process it
  • Not indexable by document management systems

Searchable PDF (after OCR)

  • Original image stays exactly the same
  • Invisible text layer added on top
  • Ctrl+F finds any word instantly
  • Text is copyable, selectable, and searchable
  • Accessible and indexable by any modern system

Our tool handles the conversion automatically. For scanned books, old contracts, legal documents, medical records, and archives making them searchable is the difference between a digital photo and an actual document.

OCR PDF to Word, Text, and Other Formats

Need the text in an editable format? After running OCR on this page, you have several paths:

OCR PDF to Word

Run OCR here to make your scanned PDF searchable, then use our PDF to Text tool and click "Open in Word" to send extracted text to Word Online. Format, edit, and export as DOCX.

OCR PDF to Text

If you just need plain text, use PDF to Text directly. It extracts editable text you can copy, download as TXT, or share via WhatsApp.

OCR PDF to Excel

For tables and spreadsheets, use PDF to Table after OCR. It extracts tabular data into an editable spreadsheet format.

OCR PDF to Data

Extract structured fields like emails, phone numbers, dates, and addresses from scanned invoices and forms using PDF to Data.

Adobe Acrobat OCR vs OnlineOCR.io

Adobe Acrobat Pro DC includes OCR via Tools → Scan & OCR → Recognize Text. It works well but requires a paid subscription ($12.99–$24.99/month), desktop installation, and can be slow for batch jobs.

Our free browser-based OCR gives you the same core feature making scanned PDFs searchable with added benefits: no subscription, no installation, no file-size limits beyond 25MB per file, works on any device, and processing happens entirely in your browser so your files never leave your device.

Adobe Reader cannot OCR it's a viewer only. If you're on Adobe Reader, you need a separate OCR tool. Our free tool fills that gap.

Why Choose Our PDF OCR Tool?

  • No Registration Required - Start making PDFs searchable immediately
  • Invisible Text Layer - Text is searchable but doesn't affect visual appearance
  • Multi-Language Fonts - Correct fonts for Arabic, CJK, Indic, and Latin scripts
  • Batch Processing - Convert up to 5 PDFs simultaneously
  • 100% Browser-Based - All OCR happens locally, no server uploads
  • Preserves Original Quality - PDF images remain at original resolution
  • ZIP Download - Download all searchable PDFs in one compressed file
  • Google Drive Ready - Direct upload to Drive with auto-sync option

Frequently Asked Questions

A searchable PDF has an invisible text layer overlaid on the scanned image. This allows you to search for words, copy text, and index the document while the visual appearance remains identical to the original scan. It's ideal for archiving, document management systems, and making scanned documents accessible.

No! The OCR text layer is completely invisible (0% opacity). It doesn't affect the visual appearance of your PDF in any way. The original scanned image remains exactly as it was. The text is only there for searching, copying, and indexing purposes.

Yes, absolutely! All OCR processing happens locally in your browser using Tesseract.js and PDF.js. Your files are never uploaded to any server. The searchable PDF is created entirely on your device. Google Drive sync is optional and requires your explicit permission.

We support 100+ languages with automatic font selection. Latin scripts use Helvetica, Arabic/Persian/Urdu use Noto Naskh Arabic, Chinese uses Noto Sans SC/TC, Japanese uses Noto Sans JP, Korean uses Noto Sans KR, and Devanagari/Hindi uses Noto Sans Devanagari. Other scripts fall back to Noto Sans.

Yes! Upload up to 5 PDFs (up to 10 for registered users) and process them all at once. Each PDF gets its own searchable text layer. After processing, you can download individual files or use the "Download All as ZIP" button to get everything in one compressed file.

Connect your Google Drive account to upload searchable PDFs directly. Files are saved in onlineocr.io/Pdf2Ocr folder as _searchable.pdf. Enable auto-sync in settings to automatically upload after processing, or manually upload individual files. Only registered users can access this feature.

Yes! After processing all PDFs, click the "Download All as ZIP" button to get a single ZIP file containing all searchable PDFs. Each file is named with "_searchable" suffix to distinguish from the original. This is perfect for batch processing multiple documents.

Yes! Our PDF to Searchable PDF converter is fully responsive and works on all devices desktop, tablet, and mobile. The interface adapts to your screen size. However, OCR processing is CPU-intensive, so desktop usage is recommended for large files.

Just use the tool on this page. Upload your scanned or image-based PDF, select the language, and click "Make Searchable PDF." The OCR engine runs entirely in your browser no signup, no fees, no upload to any server. Download the searchable PDF when it's done.

Yes Adobe Acrobat Pro DC has built-in OCR (Tools → Scan & OCR → Recognize Text). However, it requires a paid subscription ($12.99–$24.99/month) and desktop installation. Adobe Reader cannot OCR it's a viewer only. Our free browser-based tool offers the same core feature with no subscription.

Yes! After making your PDF searchable, use our PDF to Text tool to extract editable text, then click the "Open in Word" button to send it to Word Online. You can format, edit, and export as DOCX.

OCR PDF produces a searchable PDF the original document with an invisible text layer. PDF to Text extracts the text content only, producing TXT files or editable text. Use OCR PDF when you want to preserve the visual document and make it searchable. Use PDF to Text when you want the plain text content.

Scanned PDFs are typically image-based the pages are stored as pictures, not text. Even though you can see words on the page, the PDF doesn't contain any machine-readable text. That's why Ctrl+F finds nothing and copy-paste gives you garbled output. OCR (which this tool performs) adds the missing text layer.

For table-heavy PDFs, use our PDF to Table tool after running OCR. It extracts tabular data into an editable spreadsheet format. For structured field extraction (invoices, forms), use PDF to Data.

It depends on the tool. Many free online OCR tools upload your files to their servers a privacy risk for confidential documents. Our tool runs entirely in your browser using Tesseract.js and PDF.js. Your files are never sent to any server, never stored, and never shared. Complete privacy guaranteed.

Related PDF Tools

PDF to Text
PDF to Table
PDF to Data
Word Online
Compress PDF
Merge PDF
Split PDF
Edit PDF

Ratings & Reviews

See what our users say about our tools. Your feedback helps us improve.