Free XLS Converter Online
Convert legacy Microsoft Excel XLS spreadsheets
Convert XLS Files
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Per File
100 MB
Total Queue
0 B / 500 MB
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PNG, JPG, PDF, ZIP, SRT, EML, MP4, MP3 and 300+ formats
Convert Other Formats to XLS
Convert 1 different formats to XLS
XLS Converter Features
Why choose our XLS converter
Convert XLS to
Convert XLS to modern XLSX
Convert XLS to
Convert XLS to CSV
Convert XLS to
Convert XLS to PDF
Preserve formulas and
Preserve formulas and charts
Handle legacy files
Handle legacy files
How to Convert XLS Files
Converting XLS files is quick and easy
Upload Your File
Drag and drop your file or click to browse. We support over 300 file formats. 💡 Pro Tip: You can drag and drop multiple files at once!
Choose Output Format
Select your desired output format from our comprehensive list of options.
Convert Instantly
Our powerful servers process your file in seconds with high quality results.
Download Result
Download your converted file immediately. Files are kept for 24 hours.
About XLS Format
XLS XLS is the legacy Microsoft Excel spreadsheet format used by older Office files and business archives.
XLS Technical Details
- Full Name: Microsoft Excel Spreadsheet (Legacy)
- Developer: Microsoft
- Compression: OLE2
Common XLS Use Cases
- Upgrading legacy spreadsheets
- Extracting data from old Excel files
- Converting old reports to PDF
Convert Any Format to XLS
Need to convert files TO XLS? We support converting from 1 different formats including PDF.
Why use FreeFast for XLS conversion?
FreeFast is a browser-based XLS converter built for practical file jobs. It focuses on clear conversion paths, visible limits, and useful output without installing extra software:
- Free daily credits and no watermarks: Start with 10 free daily conversions and download output files without branding.
- Bulk/batch converter support: Upload and convert multiple XLS files within plan, browser, and file-size limits.
- No signup to start: Start converting files without creating an account for your first file jobs.
- Quality controls: Conversion settings are chosen for the selected format pair, with results depending on the source file and output type.
- Encrypted transfer: Uploads and downloads use HTTPS/TLS, and temporary files are cleared after the processing and deletion window.
FreeFast XLS Converter Specification Table
| Feature | Specification Details |
|---|---|
| Max Upload File Size | 1 GB (1,000 MB) per conversion |
| Privacy and Deletion Policy | Configured result-retention window |
| File Transfer | HTTPS/TLS uploads and downloads |
| Batch & Bulk Processing | Supported within plan and browser limits |
| Compatible Operating Systems | Windows, macOS, Linux, iOS, Android, ChromeOS |
| Account Signup | No signup required for your first file jobs |
| Watermarks & Visual Edits | None. Output files are clean and unmodified |
End-to-End Privacy & File Safety
Files are handled for the conversion you request. Uploads and downloads use HTTPS/TLS, and temporary files are cleared after the processing and deletion window.
Format comparison notes
When choosing between formats, understanding key attributes helps optimize quality and compatibility:
Strengths of XLS
- Authoritative standard optimized for high compatibility.
- Exceptional balance between quality and file footprint.
- Supported out of the box by modern browsers, editors, and OS.
Quality and compression
While converting files, the processor handles scaling, color spaces, metadata, and bitrates where the selected workflow supports them. Review downloaded files before sharing important work.
FreeFast converter link badge
Add a simple link badge to a help article, intranet page, or workflow checklist when readers need a direct XLS conversion shortcut:
XLS Converter FAQ
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