Excel CSV

Excel to CSV Converter

Convert Excel to CSV in your browser. Free, private, and fast. Keep rows, columns, and delimiters usable without sending files to a server.

Drag & drop your Excel file here

or

Max file size: 50 MB · Your file stays in your browser

Your file is processed locally in your browser — nothing is ever uploaded.

Why Convert Excel to CSV?

Converting Excel to CSV is a common task whenever a file has to work somewhere that expects the other format. Microsoft Excel's .xlsx format is the world's most widely used spreadsheet format. CSV is a plain-text format for tabular data where each line represents a row and commas separate column values. This converter makes the switch locally in your browser — nothing is uploaded.

Common use cases

  • You have a Excel file and need it in CSV format.
  • The target software or platform requires CSV but your file is in Excel.
  • Typical use of CSV: Exporting database records for analysis in Excel or Google Sheets.
  • You want to reduce file size or improve compatibility without using desktop software.
Keep in mind: CSV has no standard for data types, number formats, or multiple sheets — all values are stored as text. Commas inside values require careful quoting.

How to Convert Excel to CSV

  1. Upload or drop your Excel file into the converter above.
  2. Adjust any output settings for CSV if needed.
  3. Click Convert and download your converted file instantly.

About the Formats

Excel (Microsoft Excel Workbook)

Microsoft Excel's .xlsx format is the world's most widely used spreadsheet format. Excel files support multiple sheets, formulas, charts, pivot tables, conditional formatting, macros, and rich cell styling — making them the standard for financial modelling, data analysis, and business reporting.

Compatibility: Supported by Microsoft Excel, Google Sheets, LibreOffice Calc, Apple Numbers, and most spreadsheet applications.

CSV (Comma-Separated Values)

CSV is a plain-text format for tabular data where each line represents a row and commas separate column values. It is the most universal data-exchange format — virtually every database, spreadsheet application, CRM, and analytics tool can import and export CSV files without any special configuration.

Compatibility: Universal — supported by Excel, Google Sheets, LibreOffice, every database system, and virtually all data tools.

100% Private & Browser-Based

Your files never leave your device. All conversion happens locally in your browser — nothing is uploaded to any server. No sign-up required.

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Need the reverse?

CSV to Excel Converter

FAQ

Frequently Asked Questions

Yes — completely free with no sign-up, no watermarks, and no size limits for typical files.

Quality depends on the output settings. For lossless output, choose the highest quality setting available.

Your file is processed entirely within your browser using local JavaScript. It is never uploaded to any server. Only you can access your file.

For browser-based conversion, files up to 50 MB work best. Very large files may take longer depending on your device. We recommend splitting very large files before converting.

Currently, AintoB converts one file at a time to keep the browser-based process simple and private. Reload the page to convert another file.