Excel Converter & Viewer (XLSX to CSV, JSON)
Open, view, and convert Microsoft Excel spreadsheets (.xlsx, .xls, .ods) to CSV, JSON, and XLSX directly in your browser. 100% private, no file uploads.
Trascina il foglio di calcolo Excel (.xlsx, .xls, .csv, .ods)
Max file size: 50MB per file • 100% private local execution
How to use Excel Converter & Viewer (XLSX to CSV, JSON)
Upload your Excel spreadsheet (.xlsx, .xls, .ods, or .csv).
View your table data and sheet names directly in the interactive browser preview.
Choose your export format: CSV, structured JSON, or regenerated XLSX.
Instantly download your converted data file.
Frequently Asked Questions (FAQ)
Are my confidential spreadsheets uploaded to any cloud server?
Never. FileOmniTool executes the spreadsheet engine (SheetJS) entirely within your web browser's local memory. Your sensitive financial and personal numbers never touch our servers.
What spreadsheet formats are supported?
You can load modern Excel workbooks (.xlsx), legacy Excel files (.xls), OpenDocument Spreadsheets (.ods), and comma-separated values (.csv).