Data & spreadsheets converter
Convert XLS to XLSX online for free
Convert XLS files to XLSX securely in your browser. No upload, no account and no watermark.
Drop your file here
or choose a file from your device
Input: XLS · Output: XLSX
About this XLS to XLSX conversion
What to select
Select a XLS file to produce a downloadable XLSX file locally.
What you receive
Table data is exported as XLSX for download without sending the source file to a server.
Private processing
ConvertME runs this conversion in the browser on your device. Selected files are not transferred to a processing server, and downloads are created locally after conversion.
Format details
- Input
- XLS
- Output
- XLSX
- Processing
- In browser
- Cost
- Free
How it works
Convert XLS in three steps
Choose a converter
Pick the exact input and output format you need.
Drop your file
Select a local file. Nothing is uploaded to our servers.
Download the result
Conversion finishes in your browser and exports locally.
FAQ
XLS to XLSX questions
How do I convert XLS to XLSX?
Choose a XLS file, select Convert now and download the resulting XLSX file. Processing happens in your browser.
Is this XLS to XLSX converter private?
Yes. Your selected file is processed locally and is not uploaded to ConvertME.
Do I need an account to convert XLS files?
No. The converter is free to use without sign-up or watermarks.
What will my XLSX download contain?
Table data is exported as XLSX for download without sending the source file to a server.