XLSX.com provides browser-based tools and practical resources for people who work with spreadsheets. Its Workbook Audit tool scans Excel files for issues that can be difficult to spot, including broken formula references, numbers stored as text, hidden sheets, rows and columns, external workbook links, and volatile functions. The free scan identifies issues and their exact locations without uploading the file; XLSX.com says files remain on the user’s device. A paid XLSX Pro subscription adds one-click fixes, previewed before changes are applied, along with more detailed hidden-row and column locations, a change export, and a higher file-size limit.

Beyond workbook auditing, XLSX.com offers spreadsheet viewers, file converters, utilities for tasks such as removing duplicates and trimming spaces, and templates for budgets, invoices, calendars, and other business needs. Users can also access formula generators, Excel function guides, keyboard shortcuts, cheatsheets, and weekly spreadsheet tips. With free tools alongside paid repair features, the brand aims to help users find problems, manage spreadsheet files, and work more efficiently in Excel.