Append Rows
Append mode works best when every file has the same columns in the same order. Separate-sheet mode is safer for mixed reports.
Free Excel File Merger
Combine multiple XLSX, XLS or CSV files into one workbook. Keep each file as a separate sheet or append rows into a single sheet.
XLSXXLSCSVNo upload
Choose spreadsheet files or drop them hereSupports XLSX, XLS and CSV files.
Select files to begin.
Private Processing
The spreadsheets are parsed in your browser using SheetJS. ToolZone does not receive your files.
Separate Sheets
Use separate-sheet mode when monthly reports, invoices or exports should remain visually separated. Each source sheet is copied into the final workbook.
CSV and XLSX
CSV files contain plain rows while XLSX files can contain multiple sheets and formatting. The output is always an XLSX workbook for broad compatibility.
Who Uses This Tool
Use it for sales reports, inventory exports, survey responses, finance files, attendance sheets, and operational data collected from multiple sources.
Privacy and Limitations
Files are processed in your browser with spreadsheet libraries. Very large workbooks, formulas, macros, or unusual formatting may not be preserved exactly.
Helpful FAQ
Should I merge as sheets or append rows?
Use separate sheets for different datasets. Append rows only when every file has the same columns and structure.
Can I merge CSV and XLSX files?
Yes, but review the result because formatting, formulas, and encodings can vary.
What causes messy merged data?
Different headers, hidden rows, notes above tables, and mismatched column order are common causes.
Related Tools
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Tool Creator and Review Notes
Reviewed by Taimour Hussain
Free Excel File Merger is maintained by Taimour Hussain as part of ToolZone's browser-based utility collection. The page is checked for clear instructions, realistic browser limits, and related tools that match the workflow.
Last Updated
. Updates are made when browser support changes, a workflow improves, or support questions show that guidance needs clarification.