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XLS Converter
XLS is the classic Excel format that dominated spreadsheet work from the late 1980s until 2007. If you've got old financial records, budgets, or data files sitting around from before 2007, they're probably XLS files. Microsoft replaced it with XLSX when they launched Office 2007, but XLS files are still everywhere because of how long the format was the standard. The main issue with XLS today is that it's outdated technology. XLS files are bigger than XLSX for the same data, and they have limits - only 65,536 rows and 256 columns, which sounds like a lot until you hit those limits with larger datasets. Modern XLSX files handle over a million rows. XLS also doesn't compress data as efficiently, so file sizes balloon unnecessarily. Most people convert XLS to XLSX to get smaller files and better compatibility with current software. The conversion is straightforward and your data, formulas, and basic formatting all transfer cleanly. Going the other way - XLSX to XLS - only makes sense if you absolutely need compatibility with ancient versions of Excel, which is pretty rare these days.
Converters From XLS
Converters To XLS
How to Convert Spreadsheet to XLS
To convert file format to XLS has always been easy using our spreadsheet converter to XLS tool. Here's how:
Step 1: Upload your file
Click on the 'Choose File' button to upload your file (Supported formats: ).
Step 2: Select the XLS Format
Select XLS in convert to format list.
Step 3: Edit options
Now, you have multiple options like quality, resize etc, based on XLS format.
Step 4: Download Converted File
Once the conversion is complete, click the 'Download' button to save the converted XLS file hassle-free!
What You Can Do
Modernize Old Files
Convert XLS to XLSX for smaller file sizes and better compatibility with current Excel versions.
Extract Data
Turn old XLS spreadsheets into CSV files for importing into databases or other systems.
Create PDFs
Convert financial records or data tables to PDF for archiving and sharing.
Legacy Support
Create XLS files when you need compatibility with very old Excel versions.
Reduce File Size
XLS files are bloated. Converting to XLSX can cut file sizes significantly.
Batch Convert
Process entire folders of old XLS files to modern formats all at once.
Common Questions
Should I still use XLS files?
Not really. XLSX is better in every way - smaller files, more rows, better reliability.
Can modern Excel open XLS?
Yes, but you might see compatibility warnings. Converting to XLSX is safer.
What's the row limit in XLS?
Only 65,536 rows. XLSX handles over 1 million rows, so convert if you need more data.
Will formulas work after converting?
Yes, formulas transfer cleanly from XLS to XLSX or other spreadsheet formats.
Why are XLS files so large?
Older, less efficient compression. XLSX uses better technology and creates smaller files.
Is this converter free?
Completely free with no restrictions on file size or number of conversions.
When You'll Need This
File Modernization
Converting old company spreadsheets from XLS to XLSX for better performance.
Archive Recovery
Found old XLS files in backups? Convert to modern formats before they become unreadable.
System Upgrades
Migrating to newer Excel or moving to cloud spreadsheets? Convert XLS files first.
Data Analysis
Export old XLS data to CSV for processing in modern analytics tools.
Storage Optimization
Converting XLS to XLSX frees up space in large spreadsheet libraries.
Compatibility Issues
Some newer systems struggle with XLS. Converting to XLSX solves compatibility problems.
Why Use Our Converter
No Excel Required
Convert XLS files without Microsoft Excel or any spreadsheet software.
Preserve Everything
Data, formulas, and formatting all transfer accurately to modern formats.
Quick Processing
Even large XLS files with thousands of rows convert in seconds.
Multiple Formats
Convert to XLSX for modern Excel, CSV for data import, or PDF for sharing.
Secure Handling
Your spreadsheets are processed safely and deleted immediately after conversion.
Handle Old Files
Successfully convert XLS files from Excel 95, 97, 2000, 2003 - all the old versions.