Convert CSV to Excel without uploading
A real .xlsx from any CSV — delimiters auto-detected, quoting handled, never uploaded.
Drop CSV files here or click to browse
.csv in, .xlsx out. Comma or semicolon, both fine. Nothing is uploaded.
Stop letting Excel guess
A CSV opened directly in Excel is a coin flip: the delimiter depends on your Windows region, the encoding on Excel's mood, and one wrong guess dumps every row into column A. Converting the file to a genuine .xlsx first removes every guess — this tool detects comma vs semicolon, honors quoted fields per the CSV standard, marks the header row, and writes a workbook that opens identically on every machine. All of it locally, which matters because CSVs are usually exports of your most structured, most sensitive data.
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Frequently asked questions
How do I convert a CSV file to Excel?
Drop the .csv above and download a real .xlsx — first row bolded as headers, every value in its own cell. Parsing and workbook writing both happen in your browser.
My CSV uses semicolons instead of commas. Will it work?
Yes. The parser detects whether commas or semicolons dominate and splits accordingly — European exports that use semicolons open correctly without any settings.
Why does opening a CSV directly in Excel sometimes look wrong?
Excel guesses the delimiter and encoding from your system locale, and guesses wrong often — everything lands in one column or accents break. Converting to a real .xlsx removes the guesswork: cells are cells, encoding is explicit.
Are quoted fields and commas inside values handled?
Yes — the parser follows the CSV standard (RFC 4180): quoted fields, escaped quotes and line breaks inside quotes all come through as single cells.
Is my data uploaded?
No. The CSV is read and the Excel file is built entirely on your device. Exports full of customer data never touch a server.