Free Tool
Convert CSV
to XLSX for Free.
Turn a raw CSV export into a proper Excel spreadsheet. Converted in your browser — your data is never uploaded.
Free Tool
Turn a raw CSV export into a proper Excel spreadsheet. Converted in your browser — your data is never uploaded.
Join 5M+ users who rely on Zight to increase their productivity
Free Converter
Drag your CSV here or click to browse
Comma-separated .csv files
Is this tool working for you? Let us know
How It Works
01
Upload CSV
Drop in the CSV export from your app or database.
02
Instant Conversion
Rows and columns are parsed and rebuilt as a real Excel workbook in your browser.
03
Download XLSX
Open the result directly in Excel, Numbers, or Google Sheets.
Clean Data
CSVs lose types, formatting, and encodings the moment someone double-clicks them. Converting to XLSX keeps columns as columns.
FAQ
Yes, completely free. No account or credit card is required.
No. This tool runs entirely in your browser — your files are processed on your own device and never uploaded to a server.
Yes — the conversion runs locally in your browser. Your data is never sent to a server.
Files with hundreds of thousands of rows work, but conversion speed depends on your device.
No account needed. Data never leaves your browser.