PDF Editing Issues

How to Fix Adobe Acrobat PDF Combine Issues on iPad

Tauseeq Magsi Oct 19, 2026 868 views

Question details

The user is unable to combine PDF files using Adobe Acrobat on a ninth-generation iPad, a feature that previously functioned correctly.

How to Fix Adobe Acrobat PDF Combine Issues on Your iPad

Product: Adobe Acrobat
Device & OS: iPad (iPadOS)
Scenario: Attempting to merge multiple PDF documents into a single file on an iPad device.
Observed behavior: The Combine PDF feature fails to execute, potentially due to file size limits, document security constraints, or outdated software versions.

Before you start

Ensure you have a stable internet connection if using cloud-based combine features, and verify your iPad has enough storage space to save the newly merged PDF document.

Solution 1Recommended

Verify File Size and Remove PDF Security Restrictions

Adobe Acrobat for iPad restricts combining files that are larger than 100 MB or protected by passwords. Ensuring files meet these criteria usually resolves the issue.

Many mobile PDF editing tools impose size limitations and block the modification of secured documents to maintain stability and respect file permissions.

Check individual file sizes

Locate the PDFs in your Files app, tap and hold on the file, and select 'Get Info' to ensure each file is 100 MB or smaller.

Remove password protection

Open any secured PDFs, enter the password to view them, and save an unprotected copy. You cannot merge files that have security restrictions enabled.

Verify File Size and Remove PDF Security Restrictions

Check all files: Even a single secured or oversized file in your selection will cause the entire merging process to fail.

Solution 2

Update iPadOS and the Adobe Acrobat App

Outdated system software or application versions can cause previously functional features to crash or stop responding.

Seamlessly Merge PDFs on iPad

Use WPS Office to Seamlessly Combine PDFs on Your Mobile Device

If you are struggling with Adobe Acrobat errors on your iPad, WPS Office provides a lightweight, easy-to-use alternative. Its built-in PDF tools allow you to quickly merge, split, and edit PDFs on the go without strict file size hassles.

1. Open WPS Office: Launch the WPS Office app on your iPad.
2. Access PDF Tools: Navigate to the 'Tools' tab at the bottom and select 'Merge PDF' under the PDF processing options.
3. Select your files: Choose the PDF documents you want to combine from your device storage or connected cloud drives.
4. Merge and save: Arrange the files in your preferred order by dragging them, then tap 'Merge' to generate and save your new combined PDF.

Easily merge multiple PDFs into one document directly on your iOS device.Fully compatible with Microsoft Office formats and standard Adobe PDF files.Lightweight app optimized for smooth performance on iPads.Rich built-in tools for editing, annotating, and securing your documents.

Frequently Asked Questions

Why won't my PDFs combine on my iPad?

This usually happens if individual files exceed the 100 MB size limit, are password-protected, or if the PDF application requires an update to function correctly with your current iPadOS version.

Can I merge secured PDFs?

No, most PDF applications require you to remove the password or security restrictions from the document before it can be merged with other files.

Is there a file size limit for combining PDFs on mobile?

Yes, to ensure optimal performance, many mobile PDF editors impose a maximum file size limit, commonly around 100 MB per file, for merging operations.

PDF Troubleshooting