Convert CSV to XLSX
Convert CSV to XLSX online, free — no installation, no sign-up.
or drop files here to convert CSV → XLSX
Max file size 1 GB. Browser-side conversions have no upload limit.
How to convert CSV to XLSX
Add your file
Drop your CSV file above or click Choose Files.
Convert
We convert your file securely on our server over an encrypted connection.
Download
Grab your new XLSX file — done.
What is CSV?
CSV (Comma-Separated Values) is a plain-text table format read by every spreadsheet and database tool.
What is XLSX?
XLSX is the modern Microsoft Excel spreadsheet format.
Frequently asked questions
Drop your CSV file into the box above (or click Choose Files), then click Convert and download your new XLSX file. No account or software needed.
Yes — this converter is completely free with no watermarks and no sign-up.
Yes. Files are sent over an encrypted (HTTPS) connection and automatically deleted from our servers within an hour.
You control the output. Use the advanced options (the gear icon) to set quality, and we preserve as much fidelity as the XLSX format allows.