A Guide on File Extension in Android and Windows 10 (2020)

In this post, we’ll see how to change the file extension. We’ll also look at the steps to hide or show file extensions. In this instance, I am using Windows 10 and Android.

Use the links below to navigate to the section you prefer.

Let us begin.

How to Hide or Show File Extensions (Android)

Files app, which comes with the Android device, will always show file extensions. It doesn’t have the option to hide file extensions.

The same is the case for Mi File ManagerSolid Explorer, and File Explorer Root Browser.

Show or Hide File Extensions in Astro (Android)

You can hide or show file extensions for single 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 three vertical lines at the top left. Hit on “Settings” on the menu. Tap the “Set Default View Settings” option. Check (to show) or uncheck (to hide) “Show file extensions.”

Note: In case, if the above setting didn’t work on a folder, then follow the above steps (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. On the menu, hit the “View Settings” option. Navigate to the “Advanced” tab.

Check (to show) or uncheck (to hide) the “Show file extensions” option. Hit the Ok button at the bottom.


How to Change File Extension (Android)

Open the Files app. Tap “Browse” if you’re not in it already. Scroll to the bottom. Hit “Internal Storage” or your SD card.

Now, find the file for which you want to change the extension. Long-press that file and then hit three vertical dots at the top.

Tap “Rename,” and in the pop-up, you can see the file name, a dot, and the extension of the file. Remove the existing extension and then enter the extension you prefer.

Hit the Ok button. Tap “Rename.”


How to Hide or Show File Extensions (Windows 10)

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

I said most because few file extensions such as .mui and .cpl are shown by default. You can see these file extensions within the System32 folder of your PC. Remember that these extensions can’t be hidden.

With that said, let’s see the two diverse ways to hide or show file extensions in Windows 10.

Method #1

Open File Explorer. Click on the “View” tab in Ribbon. Check (to show) or uncheck (to hide) “File name extensions.”

Method #2

Open 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 File Extension of an Individual File

Open File Explorer. Click on the “View” tab in 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, which is after the dot (.). Now, type the extension you want and then hit the “Enter” key. In the confirmation pop-up, click “Yes.”

Change File Extension of Multiple Files at Once

Put all the files for which you want to change the file extension into a single folder. Open that folder.

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

Open Command Prompt. Type cd. Hit the Space bar key and then paste the address of the folder you’ve copied. Press the “Enter” key.

Now, type the following command: ren *.* *.html

Replace html in the command with the file extension you want. Press the “Enter” key. That’s it. Now, you can see that all files in the folder got its extension changed.


Written by Thirumal raj. Check out more posts here: Android, Windows 10.