“Must have” app for Microsoft Excel users. XLStyles Tool is an Open XML based application, which can analyze and clean out corrupted cell styles in your Excel workbook. XLStyles Tool will also perform analysis of named ranges and report potential issues. User of the tool is able to take actions to remove identified corrupted file content. Files processed by the XLStyles Tool in most cases will show noticeable improvement in file size, opening times, restored ability to support cell format edits (including copy/paste operations) and better overall performance.