Convert XLS to XLSX
Pick a source and destination format below, then upload your file.
Drag & drop a file here, or
Uploading auto-detects the source format above.
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About these formats
XLS is the legacy Excel format used before 2007. Modern Excel still opens it, but many newer tools no longer write it.
XLSX is Microsoft Excel's spreadsheet format -- formulas, multiple sheets, and formatting, and the default for business data.
How to convert xls to xlsx
- Upload or drag & drop your file into the converter above.
- Confirm the output format in the destination dropdown.
- Click Convert, then download your converted file.
Frequently asked questions
Is it free to convert XLS to XLSX?
Yes -- converting XLS to XLSX on digiutil is completely free. There's no signup, no watermark, and no install required.
How do I convert XLS to XLSX?
Upload your XLS file using the converter above, confirm XLSX as the output format, and click Convert. When the conversion finishes, a download button appears.
Is my XLS file safe?
Yes. Files are processed over an encrypted connection, never shared, and automatically deleted from the server shortly after conversion.
Do I need to install any software?
No -- the whole conversion happens in your browser and on our servers. It works on Windows, Mac, Linux, iPhone, and Android with nothing to install.