Perkforge
How it works
Choose an XLSX workbook, split every worksheet into a separate workbook or divide the first worksheet by a chosen number of data rows, then download one ZIP. Nothing is uploaded and no account is required.
Useful to know
The converter reads cell values, not the original visual design. Formulas use their cached results; macros, charts, comments, merged-cell layout and formatting are not copied into the new workbooks.
Private by design
Inputs, selected files and results stay inside your browser. Perkforge does not receive the content you process with this tool.