Excel to CSV Converter
Convert Excel files (XLSX/XLS) to CSV format with advanced options. Handle multiple sheets, customize delimiters, and preserve data integrity. All processing happens securely in your browser.
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Advanced Excel to CSV Conversion Features
Convert multiple Excel sheets individually or merge them into one CSV file
Customize delimiters, encoding, date formats, and data handling options
Preserves data types, formulas, special characters, and formatting
Download all converted sheets at once or individually as needed
Preview your data before conversion to ensure accuracy
All processing in your browser - data never leaves your device
Why Convert Excel to CSV?
While Excel files offer rich formatting and multiple sheets, CSV (Comma-Separated Values) format provides universal compatibility and simplicity. Converting Excel to CSV is essential for:
- Data Import/Export: Most databases, CRM systems, and analytics tools prefer CSV for bulk data operations
- System Integration: CSV serves as a common format for data exchange between different software systems
- Programming & Scripts: CSV files are easily processed by scripts and programming languages without special libraries
- Version Control: Plain text CSV files work well with Git and other version control systems
- Performance: CSV files are smaller and faster to process than Excel files
Advanced Conversion Features
Multi-Sheet Handling
Excel workbooks often contain multiple sheets. Our converter offers flexible options:
- Convert each sheet to a separate CSV file
- Merge selected sheets into a single CSV
- Add source sheet names as a column when merging
- Selective conversion - choose specific sheets
Data Type Preservation
The converter intelligently handles various Excel data types:
- Dates: Convert to standard formats (ISO 8601, US, European)
- Numbers: Maintain precision with decimal control
- Currency: Preserve monetary values accurately
- Percentages: Convert to decimal or percentage notation
- Formulas: Option to preserve as text or use calculated values
Use Cases and Applications
Database Migration
Convert Excel data for import into MySQL, PostgreSQL, MongoDB, or other databases. CSV format ensures compatibility with bulk import tools.
Data Analysis
Prepare data for analysis in R, Python, or statistical software. CSV format is universally supported by data science tools.
E-commerce
Convert product catalogs for import into e-commerce platforms like Shopify, WooCommerce, or Amazon Seller Central.
CRM Integration
Transform contact lists and customer data for import into Salesforce, HubSpot, or other CRM systems.
Best Practices for Excel to CSV Conversion
- Review Your Data: Check for special characters, formulas, and formatting that may need special handling
- Choose the Right Delimiter: Use commas for general purposes, semicolons for European formats, or tabs for spreadsheet compatibility
- Handle Dates Carefully: Select a consistent date format that matches your target system's requirements
- Test with Sample Data: Convert a small sample first to verify settings before processing large files
- Preserve Data Integrity: Enable quote handling for fields containing delimiters or special characters
- Document Your Settings: Note the conversion settings used for reproducibility and troubleshooting
⚠️ Important Considerations
- CSV format doesn't support formatting (colors, fonts, borders)
- Formulas are converted to their calculated values or preserved as text
- Charts, images, and other objects are not included in CSV
- Multiple sheets require separate CSV files or merging strategy
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How do I convert Excel to CSV format?
Simply upload your Excel file (.xlsx or .xls) using the upload button or drag and drop. Select the sheets you want to convert, configure your preferences like delimiter and encoding, then click 'Convert to CSV'. You can download individual CSV files or all at once.
Can I convert multiple Excel sheets at once?
Yes! The converter supports multi-sheet Excel files. You can choose to convert each sheet to a separate CSV file or merge all selected sheets into a single CSV file. When merging, you can optionally add a column indicating the source sheet name.
Is my Excel data secure during conversion?
Absolutely. All processing happens entirely in your browser using JavaScript. Your Excel files are never uploaded to any server. This client-side processing ensures complete privacy for sensitive data like financial records, customer information, or proprietary data.
What Excel formats are supported?
The converter supports both modern Excel formats (.xlsx - Excel 2007 and later) and legacy formats (.xls - Excel 97-2003). It can handle workbooks with multiple sheets, various data types, formulas, and formatting.
How are dates and numbers handled during conversion?
Dates are converted to your chosen format (YYYY-MM-DD, MM/DD/YYYY, etc.). Numbers maintain their precision with optional decimal place limits. Currency and percentage values are preserved. You can customize how these data types appear in the CSV output.
What delimiter options are available?
The converter supports comma (,), semicolon (;), tab (\t), pipe (|), and custom delimiters. Semicolon is often preferred for European formats where commas are used as decimal separators. Tab delimiters are useful for data that will be pasted into spreadsheet applications.
Can I preserve Excel formulas in the CSV?
Yes, there's an option to preserve formulas. When enabled, formulas are exported as text with an equals sign prefix (e.g., =SUM(A1:A10)). Note that CSV files don't execute formulas - they're stored as plain text for reference or re-import.
How are special characters and line breaks handled?
The converter properly handles special characters, Unicode text, and line breaks within cells. Fields containing delimiters, quotes, or line breaks are automatically quoted to maintain data integrity. You can choose between different quoting strategies: auto, always, or never.
What's the file size limit for conversion?
Since processing happens in your browser, the limit depends on your device's available memory. The converter efficiently handles files up to 100MB. For larger files, consider splitting them or converting sheets individually to optimize performance.
Can I customize the CSV output format?
Yes, extensively! You can configure delimiters, line endings (LF for Unix/Mac or CRLF for Windows), encoding (UTF-8, UTF-16, ASCII), quote handling, null value representation, boolean formats, date formats, and whether to include headers or skip empty rows/columns.