CSV to Excel

Upload your CSV file using the button above, and our converter will create a properly formatted Excel spreadsheet (.xlsx). The conversion automatically detects columns, applies appropriate data types, and formats the output for easy use in Excel. Download your new spreadsheet and open it directly in Microsoft Excel, Google Sheets, or other spreadsheet applications.

Yes, our converter intelligently detects column separators (comma, semicolon, tab, or other delimiters) and properly parses your data into Excel columns. Header rows are typically recognized automatically. The conversion handles various CSV formats and edge cases like values containing the delimiter character.

The converter analyzes each column's content and applies appropriate Excel data types. Numbers become numeric cells (not text), dates are recognized and formatted as Excel dates, and text remains as text. This means you can immediately use Excel functions on numeric data without manual type conversion.

The free online tool processes one file at a time. ChatSlide AI supports batch conversion where you can upload multiple CSV files and have each become a separate worksheet in a single Excel workbook, or create separate Excel files for each CSV. This is efficient for converting data exports.

We support comma-delimited (standard CSV), semicolon-delimited (common in European locales), tab-delimited (TSV), and pipe-delimited files. The converter auto-detects the delimiter in most cases. If auto-detection fails, ChatSlide AI allows you to specify the delimiter explicitly.

We support UTF-8, UTF-16, Windows-1252, and ISO-8859-1 encodings with automatic detection. International characters, accented letters, and special symbols are preserved correctly. If your CSV uses an unusual encoding, ChatSlide AI allows you to specify it explicitly.

The converter creates a clean Excel file with auto-sized columns, proper header formatting if detected, and appropriate data alignment. Numbers are right-aligned, text is left-aligned, and dates are formatted according to standard conventions. You can further customize formatting in Excel after conversion.

The free online tool supports CSV files up to 50MB, which handles hundreds of thousands of rows. Excel has its own row limits (about 1 million rows), so extremely large CSVs may need to be split. ChatSlide AI offers extended limits and can help manage very large datasets.

The free tool converts directly without preview. ChatSlide AI offers a preview feature showing the first few rows of detected data, column mapping, and data type detection results. This lets you verify the conversion settings before processing the entire file.

Output is in XLSX format, compatible with Excel 2007 and later, Google Sheets, LibreOffice Calc, Apple Numbers, and most modern spreadsheet applications. This is the most compatible modern Excel format, offering full feature support and wide compatibility.