PDF Opening Issues

Fix Adobe Acrobat Reader Closing Password-Protected PDFs on Android

Bushra Parveen Oct 19, 2026 869 views

Question details

The user experiences unexpected closures when trying to read a password-protected PDF file in Adobe Acrobat Reader on an Android device.

How to Fix Adobe Acrobat Reader Closing Password-Protected PDFs on Android

Product: Adobe Acrobat Reader
Device & OS: Android
Scenario: Opening and reading a password-protected PDF file directly from Dropbox.
Observed behavior: The PDF file or the Adobe Acrobat Reader application closes automatically and unexpectedly while the document is being read.

Before you start

Verify that your Android device has a stable internet connection if you are opening the file directly from a cloud service like Dropbox, and ensure you have the correct document password ready.

Solution 1Recommended

Update Adobe Acrobat Reader and Clear App Cache

Updating the application ensures bug fixes are applied, while clearing the cache resolves temporary memory glitches that cause the app to crash.

Many unexpected closures in mobile PDF readers are caused by outdated software versions or corrupted temporary files. Keeping the app updated is the most effective way to maintain compatibility with encrypted files.

Update the App

Open the Google Play Store on your Android device, search for 'Adobe Acrobat Reader', and tap 'Update' if a newer version is available.

Clear the App Cache

Go to your device's Settings, select 'Apps' or 'App Management', find 'Adobe Acrobat', tap on 'Storage & cache', and select 'Clear cache'.

Test Device vs. App Closure

Open the password-protected PDF again. Note whether just the file closes (returning you to the Acrobat home screen) or the entire app crashes (returning you to your phone's home screen), as full crashes often indicate low device memory.

Test Other PDF Files

Try opening a standard, non-password-protected PDF to determine if the issue is specific to the encrypted file or a system-wide application error.

Update Adobe Acrobat Reader and Clear App Cache

Device Memory: If the entire application crashes repeatedly, try closing background apps to free up RAM on your Android device before opening the heavy encrypted PDF.

Solution 2

Download the PDF Locally Before Opening

Downloading the file directly to your phone's local storage prevents timeouts or syncing errors caused by reading directly from Dropbox.

Open Password-Protected PDFs Smoothly

Use WPS Office to Read Encrypted PDFs on Android

If your current PDF reader continues to crash, WPS Office provides a highly stable, lightweight, and fast alternative for opening, reading, and managing password-protected PDF files on Android.

1. Install WPS Office: Download and install the free WPS Office app from the Google Play Store.
2. Locate the PDF: Open WPS Office, tap on 'PDF' or 'Files', and navigate to your local storage or connected Dropbox account to find the encrypted file.
3. Enter the Password: Tap the PDF file to open it. When prompted by the security screen, enter the document's password and tap 'OK' to view your file securely.

Seamlessly opens password-protected and encrypted PDF files without crashing or lagging.Fully compatible with all standard PDF formats, as well as Microsoft Word, Excel, and PowerPoint files.Lightweight mobile app design that optimizes your Android device's RAM and battery life.Built-in seamless integration with cloud drives including Dropbox, Google Drive, and OneDrive.

microsoft office alternative - wps office

Frequently Asked Questions

Why does my PDF reader close automatically on Android?

This can happen due to an outdated app version, corrupted app cache, insufficient device memory (RAM), or compatibility issues specifically related to handling advanced PDF encryption.

Can opening a file directly from Dropbox cause a PDF app to crash?

Yes. If the internet connection drops or the cloud service experiences a syncing delay while the app is trying to render the document, the PDF reader may time out and close unexpectedly. Downloading the file locally usually resolves this.

How do I clear the cache for my PDF app on Android?

Open your Android device Settings, navigate to 'Apps' or 'App Management', select your PDF reader (like Adobe Acrobat or WPS Office), tap 'Storage', and choose the 'Clear Cache' option.

Is there a way to remove the password from a PDF on Android?

Yes, provided you know the current password. You can open the file in a robust PDF editor, navigate to the security or protection settings, disable the password requirement, and save the document as a new, unencrypted file.

PDF Troubleshooting