Convert XLS to XLSX Online Free - Legacy Excel Converter

Got an .xls that modern tools reject? Convert to xlsx online, then edit, share and process further.

Click or drag Excel files here

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What is XLS to XLSX?

Got an .xls that modern tools reject? Convert to xlsx online, then edit, share and process further.

Legacy support
Reads .xls
XLSX output
Modern standard
Secure handling
Files are processed in server memory only and are not stored. Do not upload sensitive spreadsheets.

QAre macros kept?

Data-focused conversion; resave macros in desktop Excel if needed.

QAre files kept?

Files are processed in server memory only and are not stored. Do not upload sensitive spreadsheets.