A Guide on File Extension in Android and Windows 10

In this post, you will see:

Let’s get started.

How to Hide or Show File Extensions (Android)

The Files app that comes with the Android device always displays file extensions.

It does not have the ability to hide file extensions.

The same applies to Mi File Manager, Solid Explorer, and File Explorer Root Browser.

Show or Hide File Extensions in Astro (Android)

You can hide or display file extensions for individual or all folders in Astro.

Remember that all folders setting doesn’t override the single folder setting.

With that said, let’s see both.

All Folders

Tap the three vertical lines at the top left.

Click on “Settings” in the menu.

Tap the “Set Default View Settings” option.

Check (to show) or uncheck (to hide) “Show file extensions.”

Note: If the above settings do not work in the folder, follow the steps above (1 to 3) and hit the “Clear” button beside “Clear Directory Options.” Remember that this will clear custom directory settings.

Single Folder

Open the folder.

Tap the three vertical dots at the top right.

Click the “View Settings” option in the menu.

Navigate to the “Advanced” tab.

Check (to show) or uncheck (to hide) the “Show file extensions” option.

Press the “Ok” button at the bottom.

How to Change the Android File Extension

Open the Files app and tap “Browse” if you are not yet in it.

Scroll down and press “Internal Storage” or your SD card.

Now find the file for which you want to change the extension.

Press this file long and then press the three vertical dots at the top.

Tap “Rename” and in the pop-up you will see the file name, a dot and the extension of the file.

Remove the existing extension and then enter the desired extension.

Press the “OK” button and tap “Rename.”

How to Hide or Show File Extensions (Windows 10)

In Windows 10, most file extensions are hidden by default.

I said most because of a few file extensions such as .mui and .cpl is displayed by default.

You can see these file extensions in the System32 folder of your PC. Remember that these extensions cannot be hidden.

With that said, let’s look at two different ways to hide or display file extensions in Windows 10.

Method #1

Open the File Explorer.

Click the View tab on the Ribbon.

Check (to show) or uncheck (to hide) “File name extensions.”

Method #2

Open the File Explorer Options.

Navigate to the View tab.

Uncheck (to show) or check (to hide) “Hide extensions for known file types.”

Click on the “OK” button at the bottom.

How to Change File Extension (Windows 10)

Change the File Extension of a Single File

Open the File Explorer.

Click the “View” tab on the Ribbon and then select “File name extensions.”

Find the file for which you want to change the file extension.

Right-click on it and then click “Rename.”

Remove the file extension that is behind the dot (.).

Now enter the desired extension and press the “Enter” key.

Click “Yes” in the confirmation popup.

Change File Extension of Multiple Files at Once

Place all the files for which you want to change the file extension in a single folder.

Open this folder.

Right-click on the address bar of the File Explorer. Click on the “Copy address” option. It’ll copy the address of the folder.

Open Command Prompt.

Type cd.

Press the Space bar key and then paste the address of the folder you copied. Press the “Enter” key.

Now enter the following command: ren *.* *.html

Replace html in the command with the desired file extension. Press the “Enter” key.

That’s it. Now you can see that all the files in the folder have changed their extension.

Read: