CSV to XLSX Converter
Convert CSV files to Excel (XLSX) format instantly with our free online converter
Upload File for Conversion
Drag & drop your file or click to select • Supports JSON, CSV, TSV, XLSX files
✓ Smart Format Detection - Automatically detects file format
✓ Instant Conversion - Convert with one click
✓ Multiple Formats - JSON, CSV, TSV, XLSX support
✓ Privacy Protected - All processing happens in your browser
All file processing happens entirely in your browser. We do not upload, store, or access any of your file data.
How It Works
Supported Formats
- • JSON: JavaScript Object Notation
- • CSV: Comma Separated Values
- • TSV: Tab Separated Values
- • XLSX: Excel Spreadsheet
Simple Process
- 1. Upload your file (any supported format)
- 2. We automatically detect the format
- 3. Choose your target format
- 4. File downloads instantly
About CSV to XLSX Conversion
CSV (Comma-Separated Values) is a simple text format for storing tabular data, while XLSX is Microsoft Excel's modern file format that supports advanced features like formatting, formulas, charts, and multiple worksheets. Converting CSV to XLSX enhances your data with Excel's powerful features.
Key Features
- Automatic data type detection and formatting
- Proper header formatting and styling
- Support for large CSV files
- Preserve data integrity during conversion
- Browser-based processing - your data stays private
- Generate properly formatted Excel files
Benefits of XLSX Format
- Rich formatting options (fonts, colors, borders)
- Support for formulas and calculations
- Multiple worksheets in a single file
- Charts and graphs for data visualization
- Data validation and conditional formatting
- Better compatibility with Microsoft Office suite
Use Cases
- Creating professional reports and presentations
- Adding formulas and calculations to your data
- Sharing data with Excel users
- Creating formatted templates for data entry