Excel to CSV
Convert Excel .xlsx or .xls to CSV in your browser. Choose a sheet and delimiter, then download.
CSV to Excel
Convert a CSV file to Excel (.xlsx) in your browser. Download a real spreadsheet — nothing is uploaded.
Drop a CSV file here or click to choose
Processed locally — nothing is uploaded
How to use CSV to Excel
Convert a CSV file into a real Excel .xlsx workbook. Choose whether the first row is a header, then download the spreadsheet.
Everything runs locally in your browser — your files are never uploaded to a server.
CSV to Excel FAQs
How do I convert a CSV file to Excel online?
Upload or drop your CSV, choose whether the first row is a header, then download an .xlsx workbook. Conversion runs in your browser.
Is CSV to Excel free?
Yes. Every Excel and CSV tool on ReallyUseful.Tools is free to use, with no account or subscription required.
Are my CSV files uploaded when converting to Excel?
No. Files are processed in your browser on this device. Nothing is uploaded to our servers.
Do I need Microsoft Excel to open the result?
The download is a standard .xlsx file you can open in Excel, Google Sheets, LibreOffice, or similar apps.
More Excel/CSV
CSV viewer
Open and browse a CSV in a paginated table in your browser. No upload — view large files locally.
Merge CSV files
Combine multiple CSV files into one in your browser. Rows are stacked and headers aligned by name.
CSV to XML
Convert CSV rows into structured XML in your browser. Each row becomes an element — nothing is uploaded.
CSV to SQL
Generate SQL INSERT statements from a CSV file in your browser. Set a table name and download .sql.