CSV to Excel
Convert a CSV file into a proper Excel (.xlsx) workbook.
How to use the CSV to Excel
- Select your CSV file.
- Click Convert to Excel.
- Download the .xlsx workbook.
About the CSV to Excel
This converter reads your CSV with PhpSpreadsheet and writes a genuine .xlsx workbook — a real Excel file, not a renamed CSV. The delimiter is detected automatically from the file’s contents, so comma, semicolon and tab-separated exports all work without configuring anything, and quoted fields containing commas or line breaks are parsed properly instead of being split in the wrong place.
Use it when a system has handed you a CSV and you want to sort, filter, format or add formulas without Excel’s import wizard nagging you every time you open it. Going the other way, Excel to CSV does the reverse trip, and Excel to JSON is the better answer when the destination is code rather than a spreadsheet.
One honest caveat: CSV carries no type information, so values that look numeric are stored as numbers. Zip codes, phone numbers and product codes with leading zeros can lose those zeros, and long digit strings may display in scientific notation — the classic CSV problem, which this tool inherits rather than solves. Everything arrives as plain values with no styling, because a CSV holds no styling to preserve. Your file is uploaded to our server, processed under a random name in a folder blocked from web access, and deleted when the request ends. The limit is 20 MB.
Frequently asked questions
Does it handle semicolon-separated files?
Yes. The delimiter is inferred from the file itself, so semicolon files (common in European Excel) and tab-separated files convert with no setting to change.
Why did my leading zeros disappear?
Because CSV has no types, so a value like 01234 is read as the number 1234. To keep them, format the column as Text in Excel afterwards, or quote and prefix the values before exporting the CSV.
Will I get formatting, colours or formulas?
No — a CSV contains none of those, only values. You get a clean single-sheet workbook that you can then format yourself.
How large a CSV can I convert?
Up to 20 MB, which is a very large spreadsheet in practice. Bigger exports need splitting before upload.
Is my data stored?
No. The file is uploaded to our server to be converted, then every temporary file is deleted at the end of the request. Nothing is kept or logged.