Convert XLS to CSV
What is XLS?
XLS
XLS is Excel's legacy binary format using BIFF (Binary Interchange File Format) within OLE compound document structure. Stores worksheets, formulas, formatting, charts, and macros. No compression—larger files than XLSX. Maximum 65,536 rows and 256 columns per sheet. Gradually replaced by XLSX since Office 2007 but widely compatible with older systems.
- XLS is a spreadsheet format
What is CSV?
CSV
CSV (Comma-Separated Values) stores tabular data as plain text with delimiters (typically commas, semicolons, or tabs). Each line represents a row; delimiters separate columns. No formatting, formulas, or multiple sheets—just raw data. Universal compatibility across platforms. Extremely simple structure. Human-readable. Maximum size limited by available memory. Ideal for data exchange and import/export operations.
- CSV is a spreadsheet format
Why Convert XLS to CSV?
✓ Workflow Integration
CSV format integrates seamlessly with industry-standard software and workflows, ensuring compatibility with professional tools and established production pipelines.
✓ Storage Optimization
Optimize file storage and bandwidth usage while maintaining appropriate quality levels for your specific use case, balancing size efficiency with content requirements.
✓ Future-Proof Format
CSV ensures long-term accessibility and compatibility as software evolves, providing reliable format support across current and future platform versions.
✓ Simplified Sharing
CSV format simplifies file sharing via email, cloud storage, and collaboration platforms with guaranteed recipient access and consistent display across systems.
How to Convert XLS to CSV
- Click the "Start Converting Now" button above
- Upload your XLS file or drag & drop it
- Select CSV as the output format (pre-selected for you)
- Click "Convert" and processing begins. Download your CSV file when complete
Features
- ✓ 100% Free Conversion
- ✓ No Registration Required
- ✓ Fast Processing
- ✓ Cross-Platform Compatible
- ✓ Secure Server Processing
- ✓ Auto-Delete After 5 Minutes
- ✓ Batch Processing Available
- ✓ Mobile Friendly
Who Uses XLS to CSV Conversion?
"I need to convert my XLS files for a specific workflow"
→ CSV conversion happens in seconds — free, GDPR compliant, and requires no software installation
"I need to convert my XLS files for a specific workflow"
→ CSV conversion happens in seconds — free, GDPR compliant, and requires no software installation
"I need to convert my XLS files for a specific workflow"
→ CSV conversion happens in seconds — free, GDPR compliant, and requires no software installation
Frequently Asked Questions
Does your converter handle multiple XLS files at once?
Yes, batch processing is available. Free accounts process 3 XLS files at once, Premium processes 20. Download all .csv files individually or as packaged ZIP.
Are XLS files encrypted during CSV conversion?
Yes—HTTPS encryption during upload and download. XLS files process on secure EU servers, convert to CSV, then auto-delete. End-to-end security.
Can I convert large XLS files to CSV?
Free users: XLS files up to 100MB. Premium users: XLS files up to 500MB. Both tiers handle typical spreadsheet files easily. Upgrade for professional CSV conversion of larger XLS assets.
What's the processing time for converting XLS to CSV?
Most XLS to CSV conversions finish in 10-30 seconds. File size and complexity affect speed—simple XLS files convert quickly, while large or intricate spreadsheet content needs additional processing time.
Do I need to install any software?
No! Everything works directly in your web browser. No downloads, no installations, no plugins required. Just upload your file and convert. Works on Windows, Mac, Linux, and mobile devices.
Ready to Convert?
Start converting your XLS files to CSV now - it's fast, free, and secure!
↑ Convert XLS to CSV Now