Upload your Excel file and get clean, standard CSV in seconds. Everything runs in your browser � your data never leaves your device.
Upload an Excel file
Supports .xlsx and .xls formats
CSV output will appear here...Upload an Excel file to see CSV output
Convert any Excel spreadsheet to CSV in three simple steps.
Drag and drop your .xlsx or .xls file, or click to browse your computer.
Choose which sheet to convert and pick your preferred delimiter format.
Copy the CSV to your clipboard or download it as a file.
An Excel to CSV converter transforms Microsoft Excel spreadsheet files (.xlsx or .xls) into Comma-Separated Values (CSV) format. CSV is a universal plain-text format that can be read by virtually any data processing tool, database, or programming language.
This is essential when you need to export Excel data for web applications, import spreadsheets into databases, share data with tools that don't support Excel format, or process spreadsheet data using scripts and automation pipelines.
Both XLS and XLSX support
Works with both modern (.xlsx) and legacy (.xls) Excel file formats.
Multi-sheet support
Convert any worksheet from a multi-sheet workbook independently.
Client-side processing
Your data never leaves your browser. No uploads, no servers.
Custom delimiters
Choose comma, semicolon, tab, or pipe as your output delimiter.
We support both .xlsx (modern Excel format, Office 2007+) and .xls (legacy Excel format, Excel 97-2003). The tool automatically detects the format.
Yes. After uploading an Excel file with multiple sheets, a worksheet selector will appear in the settings sidebar. Simply choose the sheet you want to convert.
No. All conversion happens entirely in your browser using the SheetJS library. Your file is never uploaded to any server. You can verify this by disconnecting from the internet and using the tool offline.
You can choose from comma (standard CSV), semicolon (common in European locales), tab (TSV format), or pipe (ideal for Markdown tables). Each option is optimized for different use cases.
For a complete data conversion workflow, explore our other free tools:
All processing happens in your browser. Your data never leaves your device.