How to open and convert an XLSX, XLS, ODS or CSV file
- Add your XLS, XLSX, ODS or CSV files.
- Choose the output format under “Convert to”.
- Click Convert and download the converted files.
An old .xls from business software, an .ods made in LibreOffice Calc, a CSV that should become a real workbook: spreadsheet formats are many and not always compatible. This tool converts your spreadsheets into the format that is expected, with nothing to install.
Input formats: XLS, XLSX, ODS and CSV. Output formats: Excel (.xlsx), OpenDocument (.ods), CSV and PDF. Moving from .xls to .xlsx lets you use your files in recent Excel versions and in the other tools on this site (merge, clean, split).
PDF output is ideal for sending a statement, a priced quote, a loan schedule or a report that should not be edited. Set the print area and orientation in your spreadsheet first for the best layout. Several files can be converted to the same format in one go, which saves time when a whole folder of old .xls files needs updating.
Up to 50 files of 300 MB, processed in memory and deleted after 30 minutes.
Frequently asked questions
How do I open an XLSX file online without Excel?
Upload the .xlsx (or .xls, .ods, .csv) and convert it to the format your software opens, for example CSV or PDF to read it anywhere, or XLSX to open an old .xls or an ODS file in Excel. No Microsoft account or installation is needed.
Which formats are supported?
Input: XLS, XLSX, ODS and CSV. Output: XLSX, ODS, CSV and PDF.
Are formulas kept?
Yes between XLS, XLSX and ODS. In CSV only the values are kept.
How is the PDF made?
The spreadsheet is printed to PDF using its page settings (print area, orientation) when it has them.
What happens to a multi-sheet workbook in CSV?
A CSV holds a single table. To export every sheet separately from an XLSX, use the Excel to CSV tool.
Is it free?
Yes, free with no sign-up; your files are deleted after 30 minutes.