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Excel to CSV Converter - Online Extract XLSX Data

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Excel to CSV Converter

Convert XLSX/XLS files to CSV instantly – 100% free, private, and browser-based.

Drag & drop Excel files here

or click to browse

.xlsx .xls Max 50MB per file
Files
File Size Sheet Action
No files added yet. Drop or select Excel files.

Frequently Asked Questions

CSV (Comma-Separated Values) is a universal text format that can be opened by any spreadsheet application, database, or text editor. It’s lightweight, easy to import into other systems, and works perfectly for data migration, API feeds, or machine learning datasets.

Yes! Use the “Sheet” selector for each file. Choose a specific sheet or convert all sheets. If you download all files as ZIP, each sheet becomes a separate CSV file named like filename_sheet.csv.

Absolutely safe. Everything happens locally in your browser. Your Excel files are never uploaded to any server. This is a pure client-side tool, giving you complete privacy.

We support modern .xlsx (Excel 2007+) and legacy .xls formats. Password-protected files are not supported. File size up to 50MB works best for quick conversion.

No, CSV stores plain values only. Formulas are replaced by their last calculated results. Formatting, colors, and multiple sheets are lost (each sheet becomes a separate file). If you need full fidelity, keep the original Excel file.

XLSX is a binary/open XML format supporting multiple sheets, styling, charts, and formulas. CSV is a simple text format with one sheet per file, no formatting, and widely used for data exchange.
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