Excel to CSV Converter.

Convert Excel workbooks (.xlsx, .xls) to CSV in your browser — no upload, no server. Multi-sheet workbooks are fully supported: each sheet becomes its own CSV file, automatically packaged in a ZIP archive.

What Is Excel to CSV Conversion?

Excel to CSV conversion transforms Excel spreadsheet files (.xlsx, .xls) into Comma-Separated Values (CSV) format. CSV is a plain-text universal format that can be opened by virtually any spreadsheet application, database, programming language, or data pipeline — making it the standard interchange format for tabular data. Unlike Excel's binary format, CSV has no formatting, formulas, or styles: just the raw cell values.

How to Convert Excel to CSV

  1. Click the upload area or drag and drop your .xlsx or .xls file onto it.
  2. The tool reads the workbook and displays all available sheets with their row and column counts.
  3. For a single-sheet workbook, the CSV downloads automatically. For multi-sheet workbooks, each sheet is exported as a separate CSV and all files are packaged into a ZIP archive.
  4. Open the downloaded CSV in Excel, Google Sheets, or any data tool.

Key Features

  • Multi-sheet support: Automatically detects and converts all worksheets in the workbook into separate CSV files.
  • Smart download: Single sheets download as a plain .csv; multiple sheets download as a ZIP archive — no unnecessary compression for single files.
  • Sheet metadata: See the row and column count for each sheet before downloading.
  • Correct CSV escaping: Cells containing commas, double quotes, or newlines are properly quoted so the output can be re-imported without errors.
  • UTF-8 BOM: CSV files include a byte order mark so Microsoft Excel opens them with correct encoding — no garbled characters for accented letters or non-Latin text.
  • Private by design: All parsing and conversion runs in your browser using the SheetJS library. Your files never leave your computer.

Common Use Cases

  • Data import pipelines: Export a clean CSV to load into a database, Python/Pandas, R, or any ETL tool that doesn't accept Excel format.
  • Cross-platform sharing: Share tabular data with collaborators who use Google Sheets, LibreOffice, or tools that don't support .xlsx.
  • Legacy system integration: Many older systems accept CSV but not Excel — this tool bridges the gap without installing software.
  • Data cleaning prep: Extract individual sheets from large multi-tab workbooks for focused analysis.

Frequently Asked Questions

Can I convert a multi-sheet Excel file to CSV?
Yes. All worksheets are detected automatically. Each sheet is exported as a separate CSV file and packaged into a ZIP archive for download. Single-sheet workbooks download directly as a plain .csv file.
Does the conversion preserve all Excel data?
Cell values, text, numbers, and dates are preserved. Formulas are exported as their calculated values. Formatting, charts, images, merged cells, and macros are not included — CSV is plain text only.
Are my Excel files uploaded to a server?
No. All parsing and conversion is done in your browser using the SheetJS library. Your files never leave your computer.
Why does the CSV include a UTF-8 BOM?
The UTF-8 BOM tells Microsoft Excel to open the CSV with correct UTF-8 encoding, preventing garbled characters for non-ASCII content such as accented letters or non-Latin scripts.

Privacy & Security

All file processing runs entirely in your browser using SheetJS. Your Excel files are never uploaded to any server.

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