What is .XLA file extension?
Adds modules, extra functions, and other tools to Microsoft Excel; may be included with the Excel software program, developed by a third-party, or created by the user.
Excel Add-In files can be created an added by selecting "Add-Ins..." from the Tools menu in Excel.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.