Click or drag & drop an Excel file
Supports .xlsx / .xls format, recommended max 20MB
Waiting for preview...
Upload Excel: Click or drag & drop an Excel file (.xlsx/.xls).
Select Sheet: Choose which sheet to convert from the dropdown.
Configure Options: Select delimiter, encoding, and header preference.
Preview & Download: Preview first 20 rows, then download the CSV file.
Data Migration: Export Excel data to CSV for import into other systems or databases.
Data Analysis: CSV is the standard input format for Python Pandas, R, and many analysis tools.
System Integration: CSV is one of the most universal data exchange formats.
CSV format only stores plain text data. The following Excel elements are lost: formatting (fonts, colors, borders), formulas (only computed values remain), charts, images, data validation, conditional formatting, merged cells (only top-left value kept), macros, and VBA code. Only convert plain data tables to CSV.
This tool supports selecting specific sheets for conversion. For multiple sheets, convert them one by one with individual downloads. The 'All Sheets' option packages all sheets into a ZIP file for download.
Garbled text is usually caused by encoding mismatch. This tool offers encoding options: UTF-8 (recommended, best compatibility) and GBK (for Chinese Windows systems). If CSV opens garbled in Excel, try re-converting with GBK encoding, or use Excel's 'Data β From Text/CSV' import and manually select UTF-8 encoding.
This tool uses SheetJS (xlsx.js) for Excel file parsing. SheetJS is a powerful pure-JavaScript spreadsheet library supporting XLSX, XLS, ODS, and other formats. All processing happens locally in your browser β files never reach any server.
Recommended file size is under 20MB. Since processing happens entirely in the browser, file size is limited by browser memory. For very large files with many formulas, charts, or images, consider removing unnecessary content before conversion, or use desktop software.