How to convert a CSV to Excel (XLSX)
Banks, online stores, marketing tools and form builders often export data as CSV. Opened in Excel, those files frequently land in a single column or with garbled accented characters. Converting to XLSX fixes both and gives you a workbook ready to filter, format and add formulas to.
This converter reads your CSV, works out how the data is separated and creates an Excel file with one column per field.
Step by step
- Click Select file and choose the .csv (up to 50 MB).
- Check that Convert to shows XLSX.
- Click Convert to XLSX.
- Download the Excel file and check columns with dates, codes and numbers.
Automatic delimiter and encoding
The converter detects whether your CSV uses commas, semicolons, tabs or pipes to separate columns, so it works the same with a CSV from English software as with one exported by a European app.
It also recognises the encoding: UTF-8 with or without a BOM, UTF-16, and otherwise the classic Windows encoding. That way characters like é, ñ or ü arrive intact in Excel.
What to check in the result
The XLSX contains a single sheet with the data and no formatting: a CSV stores no colours, column widths or formulas, so there is nothing of that kind to keep.
On import, values that look like numbers or dates are interpreted as such. Check columns such as postcodes, phone numbers or product codes with leading zeros, and dates that could be read with day and month swapped.
Once in Excel, you can turn the data into a table, add filters and formulas, and save it as a regular workbook. If you need to send the data back to the original system, export it again as CSV.
Frequently asked questions
- My CSV uses semicolons. Will it work?
- Yes. The delimiter is detected automatically among comma, semicolon, tab and pipe.
- Why did accents look broken in Excel?
- Excel sometimes guesses a CSV's encoding wrongly. Here it is detected before the XLSX is created.
- Is one sheet created per file?
- Yes, each CSV becomes an XLSX with one sheet.
- Can leading zeros be lost?
- It can happen in columns that look numeric, like postcodes. Check them in the result.