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CSV to Excel Converter Online Free

Convert CSV files to Excel spreadsheets (XLSX) online for free. Import comma-separated data into a formatted Excel workbook instantly.

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🔒 Encrypted transfer · Files auto-deleted · No account required

Convert CSV to Excel Online

Import comma-separated value files (CSV) into a formatted Excel spreadsheet (XLSX) in one click. IslandPDF converts CSV data to Excel with columns properly aligned, making it easy to analyze, filter, and sort your data.

How to convert CSV to Excel

  1. Upload your CSV file by dragging it into the tool or clicking to select.
  2. The converter parses the CSV structure and detects the delimiter.
  3. Click Convert to generate the Excel workbook.
  4. Download the XLSX file and open it in Excel or LibreOffice Calc.

Frequently asked questions

What delimiters are supported?
Comma (,) is the standard delimiter. Semicolon (;) and tab-delimited formats are also commonly supported.
Will the first row be treated as headers?
Yes. The first row of the CSV is used as the column headers in the Excel output.
What encoding should my CSV use?
UTF-8 encoding is recommended for best compatibility with all characters including accented letters.
Are my files safe?
Yes. Your file is transmitted over an encrypted connection, processed on our servers, and automatically and permanently deleted immediately after processing. We never access, share, or store your content.