Choose Default Apps for PDFs, Email, and Web in Windows 11

Choosing default apps in Windows 11 determines which program opens PDF files, email links, and web links when you select them. You can set an app for each type of content in Settings; install the app you want to use first, and keep in mind that some apps may need to be configured separately for particular file types or link protocols.

What You’ll Need

A Windows 11 PC with access to Settings. Menu labels can vary slightly between updates.
The PDF reader, email app, or web browser you want to use, installed on the PC.
If the app does not appear in the list, an internet connection and permission to install or update apps may be needed.

Step-by-Step

Open Settings. Select Start, then Settings, or press Windows key + I. Choose Apps in the left-hand menu.
Open the default-app controls. Select Default apps. This page lets you assign apps by file type, link type, or app name. You can use its search field to find an installed app or a file extension.
Choose your PDF app. In the search box, type .pdf and select the result. Windows will show the app currently associated with PDF files. Select that app, choose the PDF reader you want from the list, then confirm with Set default if that button appears. If there is no single Set default button, select the current app, choose the preferred app from the choices, and confirm the change. The exact prompt depends on the Windows 11 build and app.
Check related PDF types if needed. Search for the app by name on the Default apps page and open its settings. Windows may list several file types and protocols that the app can handle. Confirm that .pdf is assigned to your chosen reader. Other extensions, such as .xps, are separate formats; change those only if you want that app to open them too.
Choose a browser for web links. Return to Default apps, search for the browser you want, and select it. Use Set default if available. Otherwise, review the listed associations and assign the web-related protocols and file types, such as HTTP, HTTPS, .htm, and .html, to that browser. Confirm each choice when Windows asks. Setting HTTP and HTTPS is especially important for links opened from other apps.
Choose an email app. Search for your preferred email app on the Default apps page and open its settings. Assign the MAILTO protocol to it, which controls the app opened by email links. If the app offers email file-type associations, review those too, but do not assume that changing MAILTO makes it the default for every email-related file or account.
Test each choice. Open a local PDF file, select a web link in another app, and select an email link if available. Check that each action opens the app you selected. A web page or email account may still open in a particular app if that app has its own setting that overrides or handles the action internally.

Common Mistakes

Changing only the app, not the association. Choosing an app from the list does not always assign every relevant file type or protocol. Check .pdf for PDFs, HTTP and HTTPS for web links, and MAILTO for email links.
Confusing an email app with an email account. The Windows default determines which program handles an email link. You may still need to add or sign in to your email account within that program.
Expecting every link to follow the system default. Some apps open links in an internal browser or use a built-in email view. Check the app’s own settings if only links from that app behave differently.
Changing unrelated file types. A browser can handle many formats, but assigning every listed type to it is not necessary. Change only the associations you intend to use.
Ignoring confirmation prompts. Windows may ask you to confirm an app change. If you dismiss the prompt, the previous association can remain in place.

Tips

Search by extension or protocol when you know what you want to change: .pdf, HTTP, HTTPS, or MAILTO.
Search by app name to see its supported associations in one place. The list varies depending on the app.
After installing a new app, revisit Default apps if Windows or the installer asks whether to make it the default. You can change your choice later.
Keep a familiar PDF reader available while testing a replacement. If the new app does not open a document correctly, you can restore the previous association.

Troubleshooting

The app is missing from the choices: Confirm it is installed and opens from Start. Close and reopen Settings, then search again. If it still does not appear, update or reinstall it using a trusted source and check whether it supports the file type or protocol you are assigning.

The old app still opens: Return to Default apps and check the exact association that was used. For PDFs, inspect .pdf; for browser links, check both HTTP and HTTPS; for email links, check MAILTO. Select the preferred app again and accept any confirmation prompt. Then test with a new link or file.

Only one source of links ignores the choice: The source app may use its own browser or email setting. Look in that app’s settings for options about opening links externally or choosing a browser. If there is no such option, that app may not follow the Windows default for that action.

Settings will not save the change: Restart the PC and try again. Install available Windows updates, and update the app you are assigning. If the PC is managed by an employer or school, an administrator may control default-app settings; contact them rather than trying to bypass those controls.

Frequently Asked Questions

Can I use different apps for PDFs, email, and web browsing?
Yes. Set each association separately. A PDF reader can open .pdf files, a browser can handle web protocols, and an email app can handle MAILTO links.

Does setting a default email app add my email account?
No. It chooses the app that responds to email links. Open that app and follow its normal sign-in or account setup process.

Why does a link still open in another browser?
The app containing the link may use an internal browser or its own browser preference. Check that app’s settings, and verify HTTP and HTTPS in Windows Default apps.

Can I change the defaults back?
Yes. Return to Settings > Apps > Default apps and assign the previous app to the relevant extension or protocol.

What is the difference between .pdf and a PDF reader app?
.pdf is the file type. The reader app is the program Windows uses to open files of that type. Changing the .pdf association selects the program.

Will these steps work on every Windows 11 PC?
The Settings path is generally the same, but labels and prompts can differ across updates, installed apps, and managed devices. Search for the extension or protocol if the layout differs.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

More in this bed

The whole Tech How-To bed →