XLSX to XLS Converter

About This Tool

This tool converts XLSX to XLS by parsing the workbook structure and translating data, formats, and sheet order into the older Excel 97-2003 format. It emphasizes data fidelity and compatibility, aiming to preserve values and layout while informing users about inevitable limitations.
Conceptual workflow: the converter reads the source workbook, maps cell values and basic formats, preserves sheet order, and writes an XLS workbook using compatible schemas. Complex features present in XLSX, such as macros, external data connections, or certain advanced chart types, are not guaranteed to map exactly and may be omitted or downgraded. A detailed conversion report highlights any such changes.
Audience and value: data analysts, finance teams, IT admins, and operations groups relying on legacy Excel environments gain a dependable path to modern data while maintaining accessibility for older systems. The tool’s unique differentiator is explicit compatibility feedback and conservative feature handling, reducing downstream errors during deployment. Core features include single-file processing, multi-sheet support, preservation of core cell values and number formats, and a downloadable XLS file compatible with Excel 97-2003. An optional batch-processing approach could be exposed later for teams migrating large portfolios of workbooks.
Typical use cases: archival migrations, reports shared with external partners using older software, and automation pipelines requiring older format inputs. By focusing on compatibility rather than feature parity, the tool mitigates version friction and accelerates transition to stable legacy workflows.

Sign in to see all your usage