You have been asked to divide some files according to the type of membership, but unfortunately you are unable to view their extensions and you do not know how to go on. Well believe me, there is nothing you need to worry about! I understand you, you are at the very beginning with the computer world and you are "afraid" of anything, but trust me, enabling the display of file extensions is one of the easiest operations in this world.
It doesn't matter what type of PC or what operating system you have, to find out how to view file extension all you have to do is take a couple of minutes of free time (but even less!) and follow the directions I am about to give you. In no time all your documents, all your spreadsheets and any other file saved on your computer (or stored on devices connected to it) will present the three or four "magic letters"  that will allow you to discover immediately the type.
Once you have enabled the display of extensions, you can also rename those files that have the wrong extension (quite frequent problem with e-mail attachments) and allow your PC to recognize it without problems. But be careful: changing the name of a file extension does not mean converting it. If you download an image in JPG format and rename it to “.GIF” it will not become a GIF, it will remain a JPG photo with an extension… wrong! To convert a file from one format to another you must therefore download the appropriate software or rely on specific online services and use the latter (on the blog you will find many examples of this). But now let's ban the chatter and take action. Have a good reading!
If you are using one of the newer versions of Windows, namely Windows 8.x o Windows 10, you can view the file extension simply by launching theExplore Resources (l'icona della gialla poster found at the bottom left of the taskbar), by clicking on the button Fillet located at the top left and selecting the item Change folder and search options give the menu to compare.
In the window that opens, then select the tab viewing, scroll through the list of Advanced Settings, remove the check mark from the item Hide extensions for known file types click her cousin Apply and then OK per salvare i Cambiomenti.
As an alternative to the procedure I just indicated, you can view file extension by clicking on the tab View located in the upper left part of the window File Explorer and placing the check mark next to the option File name extension.
Once this is done, all extensions will be displayed at the end of the filenames. You will then find the extensions .jpg / .bmp / .gif after the name of the images, the extension .doc after the name of the Word files and so on. It was very simple, wasn't it?
In case of second thoughts, as easily understood, you can easily go back by going in File> Change Search and Folder Options> View e rimettendo la spunta sull'opzione Hide extensions for known file types.
Windows Vista / 7
If on your computer it is installed Windows Vista or Windows 7, to activate the display of file extensions, start theExplore Resources (also in this case it is the icon of the gialla poster located at the bottom left of the taskbar) and select the item Folder and search options from the menu Organize which is located at the top left.
In the window that opens, select the tab viewing, scroll through the list of Advanced Settings, uncheck the option Hide extensions for known file types click her cousin Apply and then OK per salvare i Cambiomenti.
Even then, if you change your mind, you can easily retrace your steps by putting the check mark on the option you previously deselected. Easy, right?
For one reason or another you still use the good old man Windows XP ? Bad! You should update it as soon as possible, also because it is an operating system that is no longer supported by Microsoft, obsolete and, for this reason, potentially unsafe. However, if you want to activate the display of file extensions, know that you have to click on the button Start and select any folder (ex. Documents, Images etc.) from the menu that appears.
At this point, clicca sulla voce Means located at the top right of the window that opens, select Folder options from the menu that appears and proceed as we have seen for the most recent editions of Windows. Then presses on the card viewing, scroll through the list of Advanced Settings, uncheck the option Hide extensions for known file types click her cousin Apply and then OK but I will modify it.
In case of second thoughts, you know by now, go back to the folder settings, select the tab viewing and put the check mark on the option again Hide extensions for known file types.
You just bought your first one Poppy and still don't know how to view file extension? Fear not, even on macOS / OS X you can change this setting in a matter of clicks.
All you need to do is start the Finder (l'icona della smiling faccia located at the bottom left of the bar Dock), click on the item Finder that appears at the top left and select the item Pref Renze give the menu check if you press.
At this point, select the tab Advanced from the Finder configuration panel, put the check mark next to the item Show all filename extensions and the game is done.
And in case of second thoughts? No problem. Go back to the Finder, access the application preferences and remove the check from the previously activated item.
If you are trying a distro Linux (Eg Ubuntu) and can't find a setting for displaying extensions in filenames, don't worry, that's normal. Linux, in fact, approaches files differently than Windows. In addition to taking into consideration the extension, the penguin's operating system (or rather, its desktop environment) analyzes the contents of the file and tries to “guess” its type using heuristic techniques.
This means that in many file managers, such as Ubuntu's Nautilus, the extension is simply considered a part of the filename and you are not allowed to hide or display it at will.
In reality, even on Macs only extensions are used to determine the type of a file, but Apple has decided to introduce the possibility of hiding or displaying extensions in the Finder.
Change File Extensions
Now that you have finally figured out how to view file extension you may need to make some changes. You ask me how to do it? On Windows operating systems you have to right-click the element on which you intend to go and click on the item Rhinomine attached to the menu that opens. Then delete everything written after the final point in the file name and type the correct extension of the same.
To conclude and confirm the changes made to the file, press the button Submit on your computer keyboard and then click Si corresponding to the notice that is shown on the screen.
As an alternative to the procedure in question, you can make changes to the extension of a given file by right-clicking on the element on which you intend to act, then clicking on the item Property in the menu that is shown to you and editing the text field located at the top of the card General window that has gone to open. Then click first on OK and then Si to apply all changes.
On Mac the procedure to follow is good or bad the same that you have to put into practice on Windows systems. To make changes to the extension of a file just select the element on which you want to act by right clicking on it and then click on the item Rhinomine attached to the menu that opens.
Alternatively, you can left click the file you want to act on, left click on its name again and wait a few moments for it to be highlighted. You can also left click on the file name and press the button Submit on the keyboard.
As you can see for yourself, the steps to take to change the file extension are quite simple and can be done by anyone. Nevertheless, if you think you need more info you can take a look at my tutorial on the topic in which I have explained everything to you in great detail.
As already mentioned at the beginning, I remind you that changing the extension of a file is absolutely not the same as converting it. Therefore, if you need to transform a given file from one format to another, you can possibly rely on the ad hoc tools available online that I reported to you in my dedicated article.
Find out About Unknown File Extensions
If you are dealing with a file that has a little-known extension and you don't know which program to open it with, try connecting to sites like OpenTheFile e PC.net, which allow you to discover the true "identity" of a file and suggest some applications that can open them.
In both cases, just type in the search field on the screen the extension about which you would like to know more, press the key Submit on the keyboard, select the relevant search result and consult the available information. Nothing difficult, in short.
However, keep in mind that the ones I just suggested are not the only two sites that allow you to identify file extensions, indeed there are galore. But be careful, some of these are used by unreliable software houses to promote their programs.
To find out what the true nature of an extension is, you don't need to download any programs, you can do everything via the Internet. If you are asked to download a software, decline. Also, once you discover the programs you need to open your files, search for them on Google and download them via their official website, do not use the links that are provided to you by third party sites (although there are some reasonably reliable). It is always better to be cautious!
- In reality, the letters that make up the extension of a file can be even more than three or four. For more info on this, consult Wikipedia. ↩︎