Convert CSV to Excel Online
Convert CSV to Excel online, free and private: your data never leaves your browser. Paste CSV or drop a file, edit in a real spreadsheet grid, then download as XLSX.
Drop a CSV or Excel file here
CSV · XLSX · XLS · XLSM · XLSB
Ready to download as a binary file.
How to convert CSV to Excel
Three steps from raw CSV to a downloadable XLSX file.
1. Paste or upload
Paste CSV directly into the landing area, or drop a CSV, XLSX or XLS file. The delimiter is auto-detected.
2. Edit in the grid
Fix values, rename columns, add or remove rows. Changes are reflected instantly.
3. Download XLSX
Click "Download XLSX" to get a fully formatted Excel file. Opens directly in Microsoft Excel or LibreOffice.
Need this conversion in your own app?
The file parsing behind this page is powered by TabularJS: a zero-dependency JavaScript library that converts spreadsheet files to JSON in Node.js and the browser. 16+ formats, formulas, styles and merged cells included.
Frequently asked questions
Is this CSV to Excel converter free?
Yes. No account, no sign-up, no watermark. Open the page and start converting.
Is my file private?
Yes. Everything runs in your browser. Your CSV file is read and processed on your device. Nothing is uploaded, nothing is logged.
Which CSV delimiters are supported?
Comma, semicolon, tab and pipe. The tool auto-detects the delimiter from the first line of your file.
Does the XLSX file preserve all data types?
Numbers are stored as numeric cells, text as text. The converter uses the TabularJS engine which handles type inference from CSV values.
Can I edit the data before downloading?
Yes. After uploading or pasting, the data is displayed in an editable spreadsheet grid. Make any changes you need before downloading the XLSX file.
Is there a file-size limit?
There is no server-side limit because nothing is uploaded. Very large files may take a moment depending on your computer.
Can I also upload an existing XLSX and re-download it?
Yes. Drop an XLSX, XLS, XLSM or XLSB file directly onto the upload area. It opens in the grid and you can re-download after editing.
Can I embed this converter in my own app?
Yes. The engine that powers this page is the TabularJS JavaScript library. You can embed it in React, Vue, Angular or plain JavaScript.