How to Change Your Default PDF Viewer in Windows

Set a New Default PDF Viewer Through Settings

Windows lets you change which program opens PDF files by default through the Settings app. Open Settings, then go to Apps > Default apps. Scroll down until you see PDF listed with your current default viewer next to it—usually Microsoft Edge or Adobe Reader. Click on the PDF entry, and a menu will show all the PDF readers installed on your computer. Select the one you want to use going forward, and Windows will switch it when ready.

This method works the same way on Windows 10 and Windows 11. The change takes effect right away; the next time you double-click a PDF file, it will open in your new default viewer. You do not need to restart your computer or close any open programs.

Key Takeaways

The fastest way to change your default PDF viewer is through Settings > Apps > Default apps, where you can pick from any PDF reader already installed on your computer.
If the PDF viewer you want does not appear in the list, you may need to install it first or check whether it has an option to set itself as default during installation.
Right-clicking a PDF file and selecting "Open with" lets you change the default for just that one file, or you can choose to change it for all PDF files at once.
Some PDF readers like Adobe Reader and Foxit Reader include their own settings to become the default viewer, which you can access from within the program itself.

Use the Right-Click Menu to Change Default for One File or All PDFs

Another quick way is to right-click any PDF file on your computer and select Open with. A submenu appears showing PDF readers you have installed. Click the one you want to use. At the bottom of that submenu, you will see an option that says Choose another app or Look for another app on this PC—click that to see all available options.

If you want to make that viewer your default for all future PDFs, look for a checkbox that says Always use this app to open PDF files before you click to open the file. If you do not check that box, the file opens in your chosen program just that one time, and your previous default stays in place.

Install a Different PDF Viewer if Your Preferred One Is Not Listed

If the PDF reader you want does not show up in the default apps list or the right-click menu, it is not installed on your computer yet. Common PDF viewers include Adobe Reader (free from adobe.com), Foxit Reader (free from foxitsoftware.com), Sumatra PDF (free, lightweight), and Google Chrome (which can open PDFs if you have it installed). read and install the one you prefer, then follow the steps above to set it as default.

During installation, many PDF readers ask whether you want to set them as your default viewer. If you see that prompt, check the box to say yes. This saves you a step after installation is complete. If you miss that prompt or the installer does not offer it, you can still change the default manually through Settings afterward.

Change Default PDF Viewer From Within Adobe Reader or Foxit

Adobe Reader and Foxit Reader both have built-in settings to set themselves as default. In Adobe Reader, open the program, click the menu icon (three horizontal lines) in the top left, select Preferences, then look for an option labeled Default PDF Handler or Set as Default PDF Viewer. Click that button, and Adobe will register itself as your default.

In Foxit Reader, open the program and go to Edit > Preferences (or Foxit Reader > Preferences on some versions). Look for File Associations or Default Viewer, then check the box next to PDF. Click OK to save. This method works even if you have already set a different default through Windows Settings—the program's own setting will override it.

Troubleshoot When Your Default Does Not Stick

Sometimes after you change your default PDF viewer, Windows reverts to the old one. This often happens if Windows updates run in the background, or if you install a new program that claims PDF files for itself. To prevent this, go back to Settings > Apps > Default apps and check that your chosen viewer is still listed as the PDF default. If it has changed, select your preferred viewer again.

If a program keeps overriding your choice every time you install an update, open that program's settings and look for an option to disable automatic default-handler registration or to stop claiming file types. Some programs have an aggressive setting that resets them as default on every launch; turning that off will stop the interference.

Understand the Difference Between Default and "Open With"

Your default PDF viewer is the program that opens when you double-click a PDF file or click a PDF link in your web browser. Setting a default does not prevent you from opening a PDF in a different program—you can always right-click and choose Open with to pick a different viewer for that one file. The default just controls what happens when you do not make a choice.

If you find yourself regularly opening PDFs in a different program than your default, that is a sign you might want to change your default to match your actual habit. Changing it takes less than a minute and saves you a right-click every time.

Frequently Asked Questions

Can I set a different default PDF viewer for work files versus personal files?

Windows does not support separate defaults based on file location or folder. You have one default PDF viewer for your entire computer. If you need different programs for different purposes, you can keep your preferred one as default and use right-click > Open with for the others.

What if I want to open PDFs in my web browser instead of a desktop program?

You can set Microsoft Edge or Google Chrome as your default PDF viewer through Settings > Apps > Default apps. Both browsers handle PDFs well and let you annotate, search, and print directly. This is useful if you prefer not to install extra programs.

Why does my PDF keep opening in Microsoft Edge even though I changed the default?

Windows updates sometimes reset Edge as the default PDF viewer. Check Settings > Apps > Default apps again and re-select your preferred program. If this keeps happening, look in your chosen program's settings for an option to prevent other apps from overriding it, or disable automatic default-handler updates in Windows Update settings.

Do I need to uninstall my old PDF viewer before setting a new default?

No. You can have multiple PDF readers installed at the same time. Changing the default just tells Windows which one to use when you do not specify otherwise. You can uninstall the old one if you want to free up space, but it is not required to switch defaults.

Will changing my default PDF viewer affect PDFs I open from email or cloud storage?

Yes. Your default PDF viewer applies everywhere on your computer—email attachments, cloud storage links, web downloads, and files on your desktop all use the same default. The only exception is if the program you are using (like Gmail or OneDrive) has its own built-in PDF viewer that opens PDFs in the browser instead of launching a separate program.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.