Convert XLSX to XLS Free — Online & Instant

Convert XLSX to XLS — Free Online

Fast, secure, no software needed.

📁 Drag & drop your file here

or click to browse • Max 100MB

✅ Free • ⚡ Instant • 🔒 Secure • 💻 No install

How to Convert XLSX to XLS

Converting .xlsx files to .xls is fast and simple with OpenAnyFile. XLSX is a spreadsheet format: XLSX is the default Microsoft Excel spreadsheet format. XLS is a spreadsheet format: XLS is the legacy Microsoft Excel binary format.

Upload your .xlsx file to OpenAnyFile
Select XLS (.xls) as the target format
Click "Convert" and wait for processing
Download your converted .xls file

Why Convert XLSX to XLS?

There are several reasons to convert from .xlsx to .xls:

Compatibility: .xls may be more widely supported by software and devices
File size: Converting between formats can reduce file size for easier sharing
Editing: XLS may offer better editing capabilities for your workflow
Sharing: Recipients may prefer .xls files for their daily use

About XLSX Format

XLSX is the default Microsoft Excel spreadsheet format. Category: Spreadsheet. Extension: .xlsx. Created by: Microsoft.

About XLS Format

XLS is the legacy Microsoft Excel binary format. Category: Spreadsheet. Extension: .xls. Created by: Microsoft.

Frequently Asked Questions

How do I convert .xlsx to .xls?

Upload your .xlsx file to OpenAnyFile, select XLS as the target, and download the converted file.

Is XLSX to XLS conversion free?

OpenAnyFile offers free file analysis. Conversion may require a one-time payment depending on the file.

Will I lose quality converting .xlsx to .xls?

OpenAnyFile preserves maximum quality during conversion. Some format-specific features may not transfer between different file types.

Can I convert .xls back to .xlsx?

Yes, you can convert .xls to .xlsx using OpenAnyFile as well.

🔓 Unlock Full File Access

Unlimited conversions, batch processing & priority support.

Upgrade to Pro — $12/mo

Cancel anytime.