If you are trying to upload a common file type that you have previously uploaded without seeing this error, then it is likely that you have misspelled the file extension.
A file extension is the 3 or 4 letter filetype suffix that appears at the end of file names on your computer. For instance, an image file may be named holidayphoto.png where holidayphoto is the file name and png is the extension.
These extensions are used by many programs and applications including WordPress to recognize file types. Following are the default file types and extensions allowed by WordPress:
When you get this error, the first thing we recommend is checking the file extension to make sure it is correct. Sometimes, you may accidentally delete a file name extension or mistype it while editing or saving a file on your computer.
On Windows 10, you can easily check file extensions. Simply open the folder that contains your file and click on the ‘View’ link at the top of the window. From here, you need to check the ‘File name extensions’ box.
After checking that box, you will now see the extension after file names.
Note: This will show the extension for all files on your computer, not just the ones in this folder.
Mac users can view file extensions by opening the Finder app and going to Finer » Preferences from the top menu.
This will bring up the Preferences popup where you need to click on the ‘Advanced’ tab and make sure that the box next to ‘Show all filename extensions’ option is checked.
Now that you can view the file name extensions, locate the file you were trying to upload and make sure it has the correct extension.
If the extension is incorrect, then you can simply right-click and select the ‘Rename’ option to change the file name and add the correct extension.
Allow New File Types in WordPress with the File Upload Types Plugin
If you are uploading a file type that is not supported by WordPress, then you can still upload it by adding it as a supported file type.
The File Upload Types plugin is the easiest way to fix the “Sorry, this file type is not permitted for security reasons” error. This was co-created by WPBeginner’s founder, Syed Balkhi.
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