#How to change file extension archive
Right-click the resulting archive and select Rename.Right-click the file or selection of files, and select Add to.Right-click each file and then select Rename.
![how to change file extension how to change file extension](https://www.partitionwizard.com/images/uploads/articles/2019/09/change-file-extension-windows-10/change-file-extension-windows-10-4.png)
Find the file that you would like to change the file extension, right-click the file, choose rename, and enter the new file extension. Make sure Hide file extensions for known file types is unchecked. Now you can see the file extension of all your files.You'll be able to email this archive as long as you rename the file extension(s) of its contents and then archive it: Windows has built-in support for zip files, so you can archive and unpack a file or group of files. For more, refer to the relevant section below. This way, you can remove or change the file extension and allow the attachments to be delivered. If you're sending multiple files, consider archiving them with a utility such as WinZip to prevent email providers from automatically adding them to a zip archive, and thus blocking the message.
![how to change file extension how to change file extension](https://static.listoffreeware.com/wp-content/uploads/file_extension_changer_batch_file_extension_changer_2018-07-04_12-35-08.png)
![how to change file extension how to change file extension](https://cdn.osxdaily.com/wp-content/uploads/2016/10/batch-changed-file-extensions-mac.jpg)
Since UITS has enabled virus filters for email attachments at IU, you will need to rename the file extension of blocked file types so that legitimate attachments can be delivered.