Convert XLS to XLSX
Free online XLS to XLSX converter — fast, secure, no install required.
Convert XLS → XLSX now →How to convert XLS to XLSX
- Click “Convert XLS → XLSX now”
- Drag or select your XLS file (up to 20 MB on the free plan)
- Choose XLSX as the output format
- Download your converted XLSX file instantly
Frequently asked questions
Is the XLS to XLSX converter free?
Yes. The free plan includes 3 conversions at no cost. Pro users get unlimited conversions up to 500 MB.
Are my files secure?
All files are encrypted in transit and automatically deleted 24 hours after conversion. We never access your content.
Do I need to create an account?
An account is required to track your conversion history. You can sign up for free in seconds.
Is the XLS to XLSX converter free?
Yes. The free plan includes 3 conversions at no cost. Pro users get unlimited conversions up to 500 MB.
Are my files secure?
All files are encrypted in transit and automatically deleted 24 hours after conversion. We never access your content.
Do I need to create an account?
An account is required to track your conversion history. You can sign up for free in seconds.
Is the XLS to XLSX converter free?
Yes. The free plan includes 3 conversions at no cost. Pro users get unlimited conversions up to 500 MB.
Are my files secure?
All files are encrypted in transit and automatically deleted 24 hours after conversion. We never access your content.
Do I need to create an account?
An account is required to track your conversion history. You can sign up for free in seconds.
Is the XLS to XLSX converter free?
Yes. The free plan includes 3 conversions at no cost. Pro users get unlimited conversions up to 500 MB.
Are my files secure?
All files are encrypted in transit and automatically deleted 24 hours after conversion. We never access your content.
Do I need to create an account?
An account is required to track your conversion history. You can sign up for free in seconds.
Do I need to create an account?
An account is required to track your conversion history. You can sign up for free in seconds.
Are my files secure?
All files are encrypted in transit and automatically deleted 24 hours after conversion. We never access your content.
Is the XLS to XLSX converter free?
Yes. The free plan includes 3 conversions at no cost. Pro users get unlimited conversions up to 500 MB.
Do I need to create an account?
An account is required to track your conversion history. You can sign up for free in seconds.
Are my files secure?
All files are encrypted in transit and automatically deleted 24 hours after conversion. We never access your content.
Is the XLS to XLSX converter free?
Yes. The free plan includes 3 conversions at no cost. Pro users get unlimited conversions up to 500 MB.
Do I need to create an account?
An account is required to track your conversion history. You can sign up for free in seconds.
Are my files secure?
All files are encrypted in transit and automatically deleted 24 hours after conversion. We never access your content.
Is the XLS to XLSX converter free?
Yes. The free plan includes 3 conversions at no cost. Pro users get unlimited conversions up to 500 MB.
Do I need to create an account?
An account is required to track your conversion history. You can sign up for free in seconds.
Are my files secure?
All files are encrypted in transit and automatically deleted 24 hours after conversion. We never access your content.
Is the XLS to XLSX converter free?
Yes. The free plan includes 3 conversions at no cost. Pro users get unlimited conversions up to 500 MB.