CSV to Excel Converter
Turn a raw CSV export into a proper Excel workbook. Upload your CSV below and get back an .xlsx file with your data in clean rows and columns, ready for sorting, formulas, charts and formatting.
CSVs come out of databases, analytics tools and web apps — but the moment a human needs to work with the data, Excel's grid is where it usually ends up.
How the CSV to Excel (XLSX) conversion works
Filembly parses your CSV — handling quoted fields, embedded commas and multi-line cells per the CSV standard — and writes each row into a fresh XLSX worksheet. A UTF-8 byte-order mark, if present, is stripped so your first column header comes through clean.
How to convert CSV to Excel (XLSX)
- Upload your .csv file above.
- Confirm Excel (XLSX) as the destination.
- Click Convert.
- Download the workbook and open it in Excel, Google Sheets or LibreOffice.
Limitations to know about
- Comma-separated files are supported; semicolon- or tab-delimited files may parse into a single column. Convert them to standard CSV first.
- CSV carries no styling, so the workbook starts unformatted — headers aren't bolded and column widths are defaults.
Privacy and security
Your file is uploaded over HTTPS, converted entirely in memory and streamed straight back to your browser. It is never written to disk, never logged and never retained after the conversion — there is nothing to delete because nothing is stored. Files are validated by extension, type and content signature, and uploads are never executed. Read more in our privacy policy.
Frequently asked questions
My CSV uses semicolons. Will it work?
The converter expects standard comma-separated values. Semicolon-delimited files (common from European Excel exports) may land in one column. Re-export the file with commas, or replace the delimiter, before converting.
Are quoted fields and commas inside values handled?
Yes — the parser follows the CSV standard, so values like "Smith, John" with embedded commas, quotes and even line breaks inside quoted fields import into single cells correctly.
Why convert CSV to XLSX instead of just opening the CSV in Excel?
Opening a CSV directly leaves you in a fragile state: Excel may mangle encodings, strip leading zeros silently, and any formatting you add is lost unless you remember to save as .xlsx. Converting first gives you a real workbook from the start.