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In windows 10, you can identify that a program support what file extensions by 2 methods.

1. "Set defaults by app"

Go to Settings -> Defaults Apps -> Set defaults by app. On the next page, Click management on the app that you want. In this situation, you can identify file associations that supported the app.

2. Find in Registry

Go to Registry Editor. And find the entry of Computer\HKEY_LOCAL_MACHINE\SOFTWARE\RegisteredApplications. This registry entry shows that where each program is logging its file associations. You can find the value of entry by the app name that you want.

In my case, I find an "IrfanView.exe" and its value is computer\HKEY_LOCAL_MACHINE\SOFTWARE\IrfanView\Capabilities\FileAssociations. if go to its location, you can find the result like below. enter image description here

enter image description here

In windows 10, you can identify that a program support what file extensions by 2 methods.

1. "Set defaults by app"

Go to Settings -> Defaults Apps -> Set defaults by app. On the next page, Click management on the app that you want. In this situation, you can identify file associations that supported the app.

2. Find in Registry

Go to Registry Editor. And find the entry of Computer\HKEY_LOCAL_MACHINE\SOFTWARE\RegisteredApplications. This registry entry shows that where each program is logging its file associations. You can find the value of entry by the app name that you want.

In my case, I find an "IrfanView.exe" and its value is computer\HKEY_LOCAL_MACHINE\SOFTWARE\IrfanView\Capabilities\FileAssociations. if go to its location, you can find the result like below. enter image description here

In windows 10, you can identify that a program support what file extensions by 2 methods.

1. "Set defaults by app"

Go to Settings -> Defaults Apps -> Set defaults by app. On the next page, Click management on the app that you want. In this situation, you can identify file associations that supported the app.

2. Find in Registry

Go to Registry Editor. And find the entry of Computer\HKEY_LOCAL_MACHINE\SOFTWARE\RegisteredApplications. This registry entry shows that where each program is logging its file associations. You can find the value of entry by the app name that you want.

In my case, I find an "IrfanView.exe" and its value is computer\HKEY_LOCAL_MACHINE\SOFTWARE\IrfanView\Capabilities\FileAssociations. if go to its location, you can find the result like below.

enter image description here

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In windows 10, you can identify that a program support what file extensions by 2 methods.

1. "Set defaults by app"

Go to Settings -> Defaults Apps -> Set defaults by app. On the next page, Click management on the app that you want. In this situation, you can identify file associations that supported the app.

2. Find in Registry

Go to Registry Editor. And find the entry of Computer\HKEY_LOCAL_MACHINE\SOFTWARE\RegisteredApplications. This registry entry shows that where each program is logging its file associations. You can find the value of entry by the app name that you want.

In my case, I find an "IrfanView.exe" and its value is computer\HKEY_LOCAL_MACHINE\SOFTWARE\IrfanView\Capabilities\FileAssociations. if go to its location, you can find the result like below. enter image description here