File Extension Database

Open THUMB File

THUMB files may refer to those named THUMBS.db or those with the THUMBS extension.

In any case, both are thumbnail image files, used by the system of almost all the most popular operating systems.

The THUMB file works as a database of browser thumbnails for operating systems, be it Windows, macOS, or Linux.

That is to say, it was in charge of saving information about the thumbnails that the computer had to show as an icon of the files that a certain folder contained when accessing it from the operating system explorer.

At present, and for a matter of comfort for the user and security, the operating system developers decided to change this behavior and currently the THUMB files are no longer generated, but rather it stores all the information related to the thumbnail cache. in a single location whenever you need it.

THUMB files are necessary?

THUMB files are usually hidden files, and an inexperienced user may confuse them with an important operating system file, which, there is a myth that deleting it will cause some kind of performance problem in the operating system.

However, nothing is further from reality, you can safely delete all the THUMB files you find on your computer.

The only 'but' that we can add to this is that these files are quite recurring, and it is normal for them to reappear over time, especially if we are working with an old OS.

Open a THUMB file

If you try to open a THUMB file, you will most likely open a scaled-down version of the original image, meaning a smaller image, and perhaps much lower quality.

In some cases, videos also generate a THUMB file, and in the case of a video taken on an Android device, you might find a THUMB file, but with the DTHUMB extension.

Software for opening and working with a THUMB file

How Can I Open THUMB File on Windows

We researched and learned that the best way to open THUMB file is to find a THUMB file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a THUMB file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open THUMB file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as THUMB file opener then try to search online for "THUMB viewer", "application to open THUMB file" or "open THUMB file" queries in the search engine you like.
Install the application you found and check if it can open THUMB file

How Can I Open THUMB File on Mac OS

We recommend to find a THUMB file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a THUMB file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with THUMB file.
If you know the Mac OS application which can work as THUMB file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open THUMB file in it.
If you don't know the application which can open THUMB file then try to search for "THUMB viewer", "application to open THUMB file" or "read THUMB file" queries in the online search engine you like.
Install the application you found and check if it can read THUMB file

How Can I Open THUMB File on Android

If you downloaded a THUMB file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded THUMB file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "THUMB".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "THUMB viewer", "THUMB file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open THUMB File on iPhone or iPad

To open THUMB File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the THUMB file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "THUMB". This way you can find apps which can open THUMB files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "THUMB viewer" or "THUMB file" online in your favorite search engine.

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