PDF Reader – All PDF Viewer is an Android application designed for reading, managing, and interacting with PDF files. It is widely used due to its user-friendly interface and versatile features, making it suitable for personal and professional use.

Change default pdf reader on android
To change the default PDF reader on your Android device, follow these steps:
1. Open Settings
- Go to your Android device’s Settings.
2. Navigate to Apps
- Scroll down and select Apps or Apps & Notifications (this may vary depending on your Android version or device).
3. Default Apps
- Tap on Default Apps. If you don’t see this option, you may need to tap Advanced to expand more options.
4. Change Default PDF Reader
- Find and tap on Set as default or Opening links.
- Look for the PDF app under the section for Document viewing or PDF files (the specific option might vary depending on the Android version).
- Select the app you want to set as the new default PDF reader from the list of installed apps.
5. Clear Defaults for the Old PDF Reader (if needed)
If you had a previous PDF reader set as default, and you want to change it:
- Go back to Apps or Applications in your Settings.
- Find the previous PDF app (such as Adobe Acrobat Reader).
- Tap on it, then look for an option that says Open by default or Set as default.
- If it’s set as the default, tap Clear Defaults to remove it.
6. Open a PDF to Confirm
- Open any PDF file. The system will prompt you to choose the default app.
- Select your new preferred PDF reader, and check the option to Always use this app.
Alternative Method (when opening a PDF file):
If you don’t want to go into the settings manually:
- Open any PDF file.
- When the system asks which app to use, select your new PDF reader.
- Tap Always to make it the default app for opening PDFs in the future.
After these steps, your new PDF reader will be the default app for opening PDF files on your Android device.

Key Features of PDF Reader – All PDF Viewer
- Easy PDF Reading
- Supports opening and reading PDF files from device storage, SD cards, or directly from emails and browsers.
- Flexible reading modes: horizontal scroll, vertical scroll, or full-screen mode.
- Search and Bookmark
- Search content within PDF documents using keywords.
- Bookmark important pages for easy navigation later.
- PDF File Management Tools
- Automatically scans and displays all PDF files on the device.
- Organize PDF files by name, date, size, or manually.
- Annotation and Note-Taking
- Add notes, underline, or highlight text within the document.
- Draw directly or add comments to specific pages in the PDF.
- Conversion and Sharing
- Convert PDF files to other formats (if supported).
- Easily share PDF files via email or other platforms.