How to OCR a PDF on Android and Copy Text from a Scan

Turn scanned PDFs into searchable, selectable text on Android with Xodo Mobile. This guide shows you how to OCR PDF documents or new camera scans, copy and share recognized text, improve OCR accuracy, and know when to use web or desktop tools.

Have you ever opened a PDF that looks perfectly readable but behaves like a photo?

That's the difference between a text-based PDF and a scanned PDF.

A normal PDF contains actual text that you can select, search, and copy. A scan contains pixels. It may look like text, but your device sees it only as an image until OCR (Optical Character Recognition) creates a text layer.

This guide focuses on Android users who want to:

• Know if a PDF needs OCR
• Use OCR on a scanned PDF on Android
• Scan a paper document and convert it to searchable text
• Copy or share text after performing OCR
• Know how to improve the OCR results
• When should they use web or desktop tools for OCR
• Get answers to common questions

How do you know if a PDF needs OCR?

Before running OCR on your mobile device, quickly test to see if your PDF needs OCR.

Simply try selecting a few words in the document:

• If you can select words, the PDF already contains live text and search should work normally. You can usually copy text without OCR.
• If you can't select words, the file is likely an image-based PDF and search won't find words inside the page image. OCR is required before the PDF text becomes searchable, selectable, or editable.

How to OCR a scanned PDF on Android with Xodo

Follow these steps to run OCR on a scanned PDF file using Xodo for Android:

1. Install and open Xodo Mobile on Android

• Download the Xodo Mobile app for Android.
• Install and open the app.

2. Open your scanned PDF and run OCR

• From the Toolbox, tap on Text Recognition (OCR).
• Select your scanned PDF.
• Tap on ADD FILES if you don't see your PDF listed.
• Tap on APPLY OCR.

3. Review the results

• Once finished, tap and open your PDF to review it.
• Test the content by searching for terms or selecting text.
• Review names, dates, numbers, and formatting before using it elsewhere.

What OCR changes

OCR makes scanned content searchable and selectable by adding an invisible text layer to the image-based document. That does not automatically mean the result becomes a editable document or that formatting will be fully preserved.

How to scan a paper document and convert it to searchable text

If you're working with a paper document, receipt, contract, or printed form, start by scanning the document with your mobile phone's camera, then convert PDF into readable text you can search and select.

Follow these steps:

1. Open the OCR scanner tool in Xodo

• Tap on Scan Document from the Toolbox menu.
• Or tap on the Scanner button at the bottom.
• Select if you want to scan manually or auto capture the document.

2. Scan your paper document

• Ensure your document is straight and laid out flat.
• With the scanner tool open, align the camera with your document.
• Capture the page.

3. Review and adjust the scan

• Check for any blurs, shadows, or cropped edges.
• Use the Filters, Crop & rotate, or Clean options to improve the image.
• Tap on the "+" button to scan in another page and repeat the steps above.
• If needed, tap on Discard scan to start over or Next if the scan is good.

4. Run OCR on the new scan

Choose to either Rotate Left or Rotate Right, if needed.

To apply OCR to multiple pages, tap on the square grid icon at the bottom and select your pages.

• Check the Convert to searchable text (OCR) box.
• Choose whether to Save to Xodo Drive or not.
• Tap on SAVE.

A cleaner scan generally produces better OCR results. Small improvements at the scanning stage can save a lot of cleanup later.

5. Test your scanned results

• Open the generated results.
• Test the file by searching for single word.

For more guides on OCR and scanning documents, check out:

• Xodo's mobile scanner guide
• How to make a scanned PDF searchable on iOS
• How to scan multiple pages into one PDF on any device

How to copy or share text after OCR on Android

After using OCR to make a scanned PDF document searchable, you can select, copy, and share the recognized text just like you would in a native PDF. Here's how:

Copy text from PDF document

1. Tap and drag cross the screen to select the text you need.
2. Tap on the copy icon in the contextual menu.
3. Xodo Mobile will copy the text to the clipboard.
4. Go into an email, note-taking app, document, or message.
5. Long tap and select the Paste text option.

Share recognized PDF text after OCR

1. Select the recognized text in your document.
2. Tap on the three dots in the context menu.
3. Tap on SHARE.
4. Choose the destination app on your device.
5. Review the output before sending it.

Searchable vs copied vs editable text

OCR can make a scanned PDF searchable and allow you to copy text, but it doesn't always make the content editable. Here's a quick breakdown of the differences.

• Searchable PDF: You can search for words within the document.
• Selectable text: You can highlight and copy recognized text.
• Editable text: You can directly update and edit text content.

A searchable PDF lets you find words, and selectable text lets you copy them, but neither automatically turns a scan into a document you can edit on your phone.

How can you improve the OCR results?

No OCR technology is perfect. Always verify important information before using recognized text. After OCR, compare the result against the original scan.

Look for:

• Misspelled names
• Incorrect dates
• Missing decimal points
• Character substitutions such as O instead of 0
• Word breaks and spacing issues

Common causes of OCR errors

OCR accuracy may be affected by:

• Blurry scans
• Skewed pages
• Low contrast
• Poor lighting
• Multi-column layouts
• Unusual fonts
• Handwritten content

Tips for better results

• Scan in good lighting.
• Keep pages flat.
• Avoid shadows across the page.
• Capture the entire page.
• Rescan blurry originals when possible.
• Verify any critical information before reuse.

When should you use web or desktop tools for OCR

Using your phone or tablet is great for grabbing a quote, paragraph, receipt total, or section of text while you're away from your computer. However, some jobs are better suited for professional PDF tools.

Consider using web and desktop OCR software when you:

• Need more extensive OCR workflows
• Work with large document sets
• Prefer working on a larger screen
• Work with sensitive files that need advanced cleanup
• Use additional desktop features like batch processing

For these larger or more complex OCR jobs, try Xodo Web for browser-based processing or Xodo PDF Studio for desktop OCR, batch processing, and offline work.

Answers to frequently asked questions

1. What is OCR?

OCR (Optical Character Recognition) is a technology that converts text in scanned PDFs and images into machine readable text you can read, search, and edit.

2. Why can't I copy text from my PDF?

The PDF is likely a scanned image rather than a text-based document. If you can't select or highlight text, run OCR in Xodo Mobile first to add a searchable text layer and make the content selectable.

3. How accurate is OCR on Android?

OCR accuracy on Android devices depends on the quality of the original scan. Clear, high-resolution documents typically produce better results than blurry or low-contrast scans. Use the OCR in Xodo to turn images and scanned documents into searchable and editable PDF files.

4. What should I do if OCR doesn't recognize part of the page?

Checking the original scan first. Blurry images, shadows, poor lighting, cropped content, and tilted pages can reduce OCR accuracy. If possible, rescan the specific page in Xodo. Then compare the OCR output against the original.

5. Will OCR preserve formatting perfectly?

Not always. OCR is designed to recognize scanned text, not fully reproduce the original layout. The Xodo app can turn scans into searchable documents, but complex formatting may require additional cleanup. Always check the quality of the output if you plan to reuse the content elsewhere.

6. Can I use Xodo to perform OCR on handwritten text?

Yes, but note that OCR works best with printed text. While some handwritten text may be recognized, results are typically less accurate and depend on handwriting style, legibility, and scan quality.

7. Can Xodo OCR recognize multiple languages?

Yes. The OCR in Xodo supports French, German, Italian, Portuguese, Danish, and more. Explore the full list of supported languages.

8. What file types can I run OCR on besides PDF?

OCR can recognize text from image files as well as PDFs. You can use OCR on document photos, receipts, forms, scanned records, and other image-based files containing printed text.

Turn scanned PDFs into searchable text on Android

If you're frequently capturing receipts, reviewing contracts, or extracting information from printed documents, proper OCR helps you get more value on Android.

Instead of manually typing text from a scan, try the OCR in Xodo PDF reader and editor to reuse the scanned text across documents, emails, notes, and messages.