PDF Opening Issues

Fix Cannot Open Attached PDFs in Adobe Acrobat Reader on iPad

Adam Davis Oct 18, 2026 869 views

Question details

The user is unable to open certain attached PDF files using Adobe Acrobat Reader on an iPad after a recent application update.

How to Fix Cannot Open Attached PDFs in Adobe Acrobat Reader on iPad

Product: Adobe Acrobat Reader
Device & OS: iPadOS 14.8 (iPad 7th Generation)
Scenario: Attempting to open specific PDF email attachments on an iPad using the Adobe Acrobat Reader app.
Observed behavior: While most PDFs open correctly, a select few attached PDF files fail to open entirely without displaying any error message.

Before you start

Verify if the issue is app-wide by opening various older PDF files; if most files open successfully, the problem is isolated to those specific attachments rather than the application itself.

Solution 1Recommended

Troubleshoot File-Specific PDF Issues

Use this solution when only a few specific PDF files fail to open while others work normally, indicating potential file corruption or formatting errors.

When an issue is isolated to a couple of files, it typically means the PDF was corrupted during the download process, or it was incorrectly exported from its original creation software (such as Adobe InDesign or Illustrator).

Re-download the PDF

Go back to the original email or message containing the attached PDF, delete the current downloaded copy, and download the attachment again to rule out partial or interrupted downloads.

Request a new copy

If the re-downloaded file still fails to open, contact the sender and ask them to recreate or re-export the PDF document and send it to you again.

Verify source export settings

If you or the sender are creating the document in software like InDesign or Illustrator, ensure the export settings are configured to output a standard, compatible PDF format.

Check File Size: Sometimes an attachment displays as 0 KB or an unusually small size if it wasn't fully uploaded by the sender. Confirm the file size is appropriate for a PDF document.

Solution 2

Update or Reinstall Adobe Acrobat Reader

Use this method if you suspect the current installation of your app is bugged or experiencing temporary glitches after an update.

Seamless PDF Reader

Open and View Any PDF on iPad with WPS Office

If certain PDFs fail to open in your current reader, try using WPS Office. It provides a robust, highly compatible PDF viewing and editing experience on iPadOS, easily handling email attachments and complex PDF documents.

1. Download WPS Office: Get WPS Office for free from the App Store on your iPad and complete the installation.
2. Locate the attachment: Open your Mail app or file manager and find the specific PDF attachment that failed to open.
3. Open the share menu: Tap and hold the PDF file, or tap the standard iOS 'Share' icon located in the preview window.
4. Select WPS Office: Choose 'WPS Office' from the list of available applications to immediately open and read your PDF.

High compatibility with various PDF formats and Microsoft Office filesSeamlessly open and manage PDF attachments directly from emails or messaging appsLightweight application that runs smoothly on all iPad generations without lagging

microsoft office alternative - wps office

Frequently Asked Questions

Why do some PDFs open on my iPad while others do not?

This usually indicates a file-specific issue. The problematic PDFs might have been corrupted during the download process, incorrectly exported from the source software, or protected by encryption that your current PDF reader does not support.

How do I clear the app cache for a PDF reader on my iPad?

iPadOS does not offer a direct cache-clearing button for most applications. To clear the cache, you can either offload the app by going to Settings > General > iPad Storage, or by completely uninstalling and then reinstalling the app from the App Store.

Can I open PDF attachments directly from the native Mail app?

Yes. Tap the PDF attachment once to download it, and tap it again to open a basic preview. For advanced viewing or if the preview fails, tap the Share icon in the top right corner and choose a dedicated PDF reader to open the file.

PDF Troubleshooting