Convert XLSX to XLS
Converting from: XLSX
Converting to: XLS
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Any size · Multiple files at once
About XLSX
XLSX is Microsoft Excel's spreadsheet format, storing rows, columns, formulas, and formatting in a compressed XML archive.
The standard choice for budgets, data tables, and anything requiring formulas or multiple sheets.
A single XLSX sheet can hold over 1 million rows and more than 16,000 columns.
💡 Excel's grid limit was only 65,536 rows until 2007 — the modern 1,048,576-row limit is exactly 2^20.
About XLS
XLS is the older binary spreadsheet format used by Excel versions before 2007.
Still needed when working with legacy systems or older software that doesn't support XLSX.
XLS files are limited to 65,536 rows and 256 columns — a fraction of the modern XLSX capacity.
💡 The XLS binary format dates back to 1987, making it older than the World Wide Web itself.
Frequently asked questions
How do I convert XLSX to XLS?
Upload your XLSX file above, and Other Streets converts it to XLS instantly in your browser — no software to install and no waiting.
Is converting XLSX to XLS free?
Yes. Every conversion on Other Streets, including XLSX to XLS, is completely free with no limits or hidden fees.
Can I convert multiple XLSX files to XLS at once?
Yes. You can upload as many XLSX files as you want and convert them all to XLS in the same batch.