Convert XLSX to CSV Online Free
Extract data from Excel spreadsheets into simple, universal CSV format. No Microsoft Office required. Works entirely in your browser.
To convert XLSX to CSV, drop your Excel file onto the converter. The first sheet is parsed using SheetJS and converted to comma-separated values. No Excel installation needed, and your spreadsheet never leaves your device.
Convert XLSX to CSV
Drop your XLSX file here to convert it instantly
Drag & drop your .xlsx file here, or click to browse
Your file never leaves your browser
XLSX vs CSV: Format Comparison
Key differences between the two formats
When to Convert
Common scenarios where this conversion is useful
Data import into databases
Most databases (MySQL, PostgreSQL, SQLite) support CSV import directly. Convert your Excel data to CSV for bulk database loading.
Data analysis with Python or R
CSV is the standard input format for pandas, R, and other data science tools. Convert Excel reports to CSV for scripting and analysis.
Sharing data without Excel dependency
Not everyone has Microsoft Excel. CSV files can be opened by any spreadsheet application, text editor, or programming language.
Version control for data files
XLSX files are binary and produce unusable diffs in Git. Convert to CSV for meaningful line-by-line version control of your data.
How to Convert XLSX to CSV
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1
Upload your Excel file
Drag and drop your .xlsx file onto the converter, or click to browse. Files with multiple sheets are supported (first sheet is converted).
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2
Automatic conversion
Your spreadsheet is parsed in the browser. Formulas are resolved to their computed values. Formatting is stripped, leaving only the raw data.
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3
Download the CSV result
Click Download to save your CSV file. Values are comma-separated with proper quoting for fields that contain commas or newlines.
Frequently Asked Questions
The first (leftmost) sheet in your workbook is converted to CSV. If you need a different sheet, rearrange the sheet order in Excel before converting.
Formulas are resolved to their last computed values. The CSV output contains the calculated results, not the formula expressions themselves.
Excel dates are converted to their text representation. Date formatting follows the format applied in the spreadsheet (e.g., MM/DD/YYYY or YYYY-MM-DD).
Merged cells are unmerged during conversion. The value appears in the top-left cell of the original merge range, and the remaining cells are empty.
Yes. The conversion runs in your browser, so it can handle files with hundreds of thousands of rows depending on your device's memory. Files up to 100MB work well on modern computers.
Yes. Fields containing commas, quotes, or newlines are automatically wrapped in double quotes following RFC 4180 CSV standards.
No. The converter uses SheetJS to parse Excel files directly in the browser. No Excel or Office installation is required.
No. Password-protected or encrypted Excel files cannot be read by the browser-based parser. Remove the password protection in Excel first.
The output uses UTF-8 encoding, which supports all international characters, emojis, and special symbols.
Yes. Your file is processed entirely in your browser. No data is sent to any server. This makes it safe for confidential financial data, customer lists, or any sensitive information.
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