XLSX File Viewer | Android | A1 Apps

XLSX Reader: You can set the XLSX Reader & Spreadsheets Editor app as your default All-in-One XLSX app and use it to open XLS, CSV, XLSX, XLSM, and Sheets directly from the web, email container, or file management in this XLSX sheet reader without having to start the application.

Download link - https://play.google.com/store/apps/details?id=com.a1.xlsx.reader.spread.sheets.viewer.xls.files.sheet.editor.converter