Convert CSV data to Excel (.xlsx) format instantly in your browser. Free, private, no server upload. Supports custom delimiters and automatic data type detection.
Drop CSV file here or click to upload
CSV to Excel Converter is a free online tool that transforms CSV (Comma-Separated Values) data into Excel (.xlsx) format instantly. All processing happens entirely in your browser — no data is ever sent to a server, ensuring complete privacy and security. Whether you are preparing reports, analyzing data, or sharing spreadsheets, this tool handles it all with customizable parsing options and one-click download.
Yes, absolutely. All conversion happens entirely in your browser. Your CSV data is never sent to any server, ensuring complete privacy and security.
The tool supports comma, semicolon, tab, and pipe delimiters. You can select the appropriate delimiter from the dropdown menu before converting.
Auto type detection analyzes each cell and determines whether it contains a number, date, or text. This ensures that numbers are formatted as numbers (not text) and dates are properly recognized in Excel.
Yes, you can drag and drop a CSV file onto the drop zone or click to browse and select a file from your device.
The generated .xlsx files are compatible with Microsoft Excel 2007 and later, Google Sheets, LibreOffice Calc, Apple Numbers, and all modern spreadsheet applications.
Empty cells in your CSV are preserved as empty cells in the Excel file. The structure of your data is maintained exactly as provided.
There is no artificial size limit. However, extremely large files (megabytes) may cause browser performance issues. For most use cases, the tool handles files of any practical size instantly.
Currently, the tool processes one CSV file at a time. For multiple files, simply repeat the process for each file.