You can use this page to convert Armory inventory data to XLSX or XML format. Browse to your \WTF\Account\<your account name>\SavedVariables folder, select your Armory.lua or ArmoryGuildBank.lua file, and click one of the download icons. Please be aware that there are several SavedVariables folders so be careful to pick the right one.

By default only equippable items, if stored in the data file, will be included when uploading character data. Guild bank data however will include all items except battle pets. Enable 'Include all items' below to include every item.

Your uploaded data will not be saved or used in any other way than converting it to the desired format.

Please visit the download page for additional tooling.