CSV to Excel Converter

Convert CSV files to downloadable .xlsx Excel spreadsheets instantly in your browser. No upload to any server required.

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1. Upload a CSV file by clicking the drop zone, dragging it in, or paste CSV text directly into the input area. 2. Let the tool auto-detect the delimiter, or manually select comma, semicolon, tab, or pipe from the options. 3. Preview the parsed data in the table view to confirm columns and rows are correctly separated. 4. Optionally set a custom sheet name for the output Excel workbook. 5. Click Convert to generate the .xlsx file, then download the Excel spreadsheet.

About This Tool

The CSV to Excel Converter transforms plain CSV files into fully formatted .xlsx spreadsheets that open natively in Microsoft Excel, Google Sheets, and LibreOffice Calc. Simply drag and drop your CSV file or paste its contents, and the tool generates a downloadable Excel workbook with properly separated columns, preserved data types, and clean formatting.

CSV files are a universal data exchange format, but they lack features like multiple sheets, cell formatting, and formulas that spreadsheet applications provide. Converting to Excel format lets you take advantage of these features while keeping your original data intact. This tool uses the SheetJS library to perform the conversion entirely in your browser - your data never leaves your device.

The converter handles common CSV variations including different delimiters (comma, semicolon, tab, pipe), quoted fields with embedded commas, UTF-8 encoded text with international characters, and large files with thousands of rows. You can preview the parsed data before downloading and choose a custom sheet name for the output file.

Frequently Asked Questions

The tool auto-detects commas, semicolons, tabs, and pipe characters as delimiters. You can also manually select the delimiter if auto-detection does not match your file format.
Since the conversion runs entirely in your browser, the limit depends on your device memory. Most modern devices handle files up to 50MB or several hundred thousand rows without issues. Very large files may take a few seconds to process.
Yes, the tool attempts to detect and preserve numeric values, dates, and text. Numbers are stored as Excel number cells rather than text, so you can use them in formulas immediately after opening the file.
Currently the tool converts one CSV file at a time into a single-sheet workbook. For multiple sheets, convert each CSV separately or use the resulting .xlsx files with a spreadsheet application to combine them.
No. The entire conversion happens in your browser using the SheetJS library. Your CSV data never leaves your device, making it safe for sensitive or confidential information.

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