In Window 7 file extensions are hidden by default and you might want to change the extension of any file. T0 show file extensions in Windows 7 follow the few simple steps.
Step-1
Double click on Computer icon or click on Start button > Computer
Step-2
In the explore click on Organize > Folder and search options
Step-3
In the Folder option windows click on View tab and then under Advance Settings uncheck the option Hide extension for known file types and click OK button to save the settings
![show-file-extensions-in-windows-7-3 show-file-extensions-in-windows-7-3](http://www.trickyways.com/wp-content/uploads/2009/11/show-file-extensions-in-windows-7-3.png)
Step-4
Now you notice that all file extensions are displaying after the file name
![show-file-extensions-in-windows-7 show-file-extensions-in-windows-7](http://www.trickyways.com/wp-content/uploads/2009/11/show-file-extensions-in-windows-7.png)
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