CSV to Excel
Convert a CSV file to Excel (.xlsx) in your browser. Download a real spreadsheet — nothing is uploaded.
CSV editor
Edit CSV cells in a spreadsheet grid in your browser. Add or delete rows, then download CSV or Excel.
Drop a CSV file here or click to choose
Edit locally — nothing is uploaded
How to use CSV editor
Edit CSV cells in a spreadsheet grid. Add or delete rows, then re-export CSV or Excel.
Everything runs locally in your browser — your files are never uploaded to a server.
CSV editor FAQs
How do I edit a CSV file online?
Drop a CSV to open it in a spreadsheet grid, edit cells, add or delete rows, then download CSV or Excel.
Is the CSV editor free?
Yes. Every Excel and CSV tool on ReallyUseful.Tools is free to use, with no account or subscription required.
Are my files uploaded?
No. Files are processed in your browser on this device. Nothing is uploaded to our servers.
Can I save back to Excel from a CSV?
Yes. After editing you can download Excel (.xlsx) as well as CSV.
More Excel/CSV
Excel to CSV
Convert Excel .xlsx or .xls to CSV in your browser. Choose a sheet and delimiter, then download.
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.