Morfile
Nothing is uploaded: conversion happens on your device
Convert XLS to XLSX
No upload: your file is converted on your device. Included in Morfile Pro.
Converting XLS to XLSX is part of Morfile Pro
24-hour pass for €3.99 or lifetime access for €24.99, no automatic renewal. Conversion stays on your device, just like the free plan.
How to convert a XLS file to XLSX
- 1 Open the Morfile app and drop your XLS files.
- 2 Choose XLSX as the output format, then start the conversion.
- 3 Download your XLSX file, or a ZIP if you converted several.
Why convert a XLS file to XLSX?
XLS is an old format, limited to 65,536 rows, that recent tools read less and less.
An XLSX opens in Excel, Google Sheets and LibreOffice, with all its sheets.
What about quality?
All values are kept. To CSV, only the first sheet is exported (Morfile tells you); the separator can be adjusted.
Frequently asked questions
Is it free to convert a XLS file to XLSX?
This conversion is part of Morfile Pro: 24-hour pass for €3.99 or lifetime access for €24.99, no automatic renewal. JPG, PNG and WebP stay free.
Is my XLS file uploaded to a server?
No. Conversion happens in your browser, on your device. Turn off your Wi-Fi to check: it still works.
Does it work on iPhone and Android?
Yes, right in the browser. Install the app in one click to convert even offline.
Can I convert several XLS files at once?
Yes, with Morfile Pro: drop as many files as you like, you get a ZIP.