Convert CSV to XLSX
Convert CSV to XLSX online for free. No signup required. Your files upload over an encrypted connection and are deleted after 2 hours.
Free
no account needed
Frankfurt
stored in the EU
2 hours
then files are deleted
New conversion
Any format in, the right format out
Drag and drop your files here, or import from:
Upload files up to 100 MB in CSV
How to convert CSV to XLSX
Everything happens on this page, in any modern browser, with nothing to install.
Upload your CSV file
Drag and drop your CSV file or browse from your device, Google Drive, Dropbox, or OneDrive.
Convert to XLSX
Press Convert. To convert several CSV files at once, add them all first.
Download your XLSX
Most files are ready in seconds.
What you get when you convert CSV to XLSX
Each CSV file you add comes back as its own download, under its original name.
- 01
With several results, Download all saves them all with one click.
- 02
If one file in a batch fails, the others still finish, and the result says what went wrong.
- 03
Your XLSX file converts on to ODS, PNG, JPG and 2 more here.
What CSV and XLSX files are
CSV
CSV (Comma-Separated Values) is a plain text format for storing tabular data where each row is a line and values are separated by commas. It is universally compatible with all spreadsheet and database applications.
XLSX
XLSX is the default Microsoft Excel workbook format since Excel 2007. It stores sheets, formulas, charts and formatting in a compressed XML package and is read by Excel, Google Sheets, Numbers and LibreOffice.
Convert your CSV files to other formats
Choose a target format below to convert your CSV files quickly and easily.
Convert other files to XLSX
Select a source format below to convert files to XLSX.
Frequently asked questions
Still have questions? Contact support.
Is it free to convert CSV to XLSX?
Yes, converting CSV to XLSX is completely free. You can convert files up to 100 MB and up to 10 files per batch, and no signup or account is required.
Will converting CSV to XLSX affect the quality?
Our converter preserves the original quality of your CSV files during the conversion to XLSX. The output maintains formatting, layout, and visual fidelity as closely as possible.
Can I convert multiple CSV files to XLSX at once?
Yes. You can convert up to 10 CSV files to XLSX in a single batch. Drag and drop all the files at once, and Novitora processes them together.
Is my data safe when converting CSV to XLSX?
Your files upload to Novitora servers over an encrypted TLS connection and are automatically deleted 2 hours after upload. Data is stored in the EU (Frankfurt), and we follow SOC 2-aligned security practices.
What devices can I use to convert CSV to XLSX?
Novitora works in any modern web browser on desktops, laptops, tablets, and phones. There is nothing to install: open the page, upload your CSV file, and download the XLSX.