CSV to Excel Converter - Free Desktop App
Convert CSV to Excel (XLSX) offline. Handle files with millions of rows that Excel can't open. Batch process folders. 100% private, no cloud upload.
Convert Your Data Files
Handle files with billions of rows
Your CSV files will be converted to Excel format (.xlsx) with all data preserved. Perfect for business reporting, data analysis, and sharing with Excel users.
Note: Note: Excel has a 1,048,576 row limit. For larger files, consider converting to Parquet format for unlimited rows and faster performance.
Why Desktop CSV to Excel Converter Beats Online Tools
| Feature | Online Tools | Diwadi Desktop |
|---|---|---|
| Upload Required | ❌ Required | 🎯 Never |
| File Size Limit | ❌ 50MB max | ♾️ Unlimited |
| Speed | ⏳ Slow (upload/download) | ⚡ Instant |
| Batch Processing | ❌ 1 file | ✅ 1000s |
| Privacy | ⚠️ Risky (cloud upload) | 🔒 100% Local |
| AI Features | ❌ No | 🤖 Yes |
| Offline | ❌ No | ✅ Yes |
| Cost | Free | Free ✅ |
How It Works
Download & Install
Takes just 30 seconds. No account, no credit card required.
Browse & Select Your CSV Files
Navigate your files like a regular file browser. Batch processing supported.
Get Excel Files (XLSX) (Instant)
Processing happens locally on your computer. No upload wait.
Why Choose Diwadi Desktop?
Privacy First
Files never leave your computer. No cloud upload, no data collection, 100% local.
Lightning Fast
Process files 10x faster than online tools. No upload wait, no download wait.
No Limits
Convert unlimited files of any size. Batch process thousands in one click.
AI-Powered
Smart formatting detection, auto-cleanup, better accuracy.
Works Offline
No internet required. Perfect for flights, secure environments.
Free to Use
No trial limits, no watermarks, no credit card required.
Frequently Asked Questions
Why can't Excel open my CSV file?
Excel has a hard limit of 1,048,576 rows. If your CSV has more rows, Excel will show a 'File too large' error. Diwadi can handle CSV files with millions or even billions of rows by converting them to Excel format in chunks or using alternative formats like Parquet.
Can I convert large CSV files (10M+ rows)?
Yes! Diwadi can handle CSV files with 10 million, 50 million, or even billions of rows. For files over 1M rows, consider converting to Parquet format instead of Excel for better performance and no row limits.
Will the conversion preserve my data?
Absolutely! All data, including special characters, formulas (as text), and formatting are preserved. Column headers, data types, and structure remain intact during conversion.
Can I batch convert multiple CSV files?
Yes! Select entire folders and convert hundreds or thousands of CSV files to Excel in one operation. Much faster than online tools that limit file counts or require individual uploads.
What's the difference between CSV and Excel?
CSV is plain text (smaller, universal) while Excel (XLSX) supports formulas, formatting, multiple sheets, and charts. Convert CSV to Excel when you need to add calculations, formatting, or share with business users who prefer Excel.
Why use desktop converter vs online tools?
Desktop conversion is instant (no upload wait), handles unlimited file sizes, works offline, and keeps your data 100% private. Online tools require uploading sensitive data, have file size limits (usually 100MB), and are slower for large files.
Is CSV to Excel conversion free?
Completely free with unlimited conversions. No file size limits, no watermarks, no trials, no credit card required.
Can I convert Excel back to CSV?
Yes! Diwadi supports bidirectional conversion - CSV to Excel and Excel to CSV. Perfect for data interchange between systems.
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