Spreadsheet converter
Convert between Excel, CSV, ODS and JSON, and preview every sheet. Files never leave your device.
Common questions
Are formulas kept?
Converting between Excel and ODS keeps formulas. CSV, JSON and HTML only store each cell's value.
Why does CSV only include one sheet?
A CSV file can hold only one table. Pick the sheet you want, or convert to .xlsx or .ods to keep them all.
Will formatting survive?
Values, sheet names, formulas and merged cells convert. Colours, fonts, charts and images are not kept.
Is my file uploaded?
No. The spreadsheet is read and converted in your browser.