# Excel Merge ## Product positioning Merge two or more local XLS/XLSX files by a unified header and export a new Excel workbook. ## Core features Multiple file selection; first worksheet header detection; data appending; field validation; merged result export. ## Input and output Input: two or more XLS/XLSX files Output: a merged XLSX file ## Supported platforms Windows, macOS, and Linux; runs locally and offline. ## Business model Free tier: 3 uses per day Perpetual license removes usage limits. ## Processing notes Files are processed locally and are not uploaded to third-party services.