Merge multiple Excel files with custom options - all processing happens in your browser
or click to browse files
This tool consolidates multiple Excel workbooks into a single file, similar to Excel's Power Query append operations or the VSTACK() function in newer Excel versions. It's designed for spreadsheet users who need to combine data from multiple sources without manual copying and pasting.
Combine departmental Excel reports (Sales, Marketing, Operations) into a consolidated monthly performance dashboard. The "Append Rows" option stacks similar formatted reports vertically.
Merge individual team member task lists or survey responses collected in separate Excel files. Use "Remove Duplicates" to clean combined data sets.
Combine historical data files (quarterly sales, annual budgets) for trend analysis. The "Custom Merge" with sorting options prepares data for PivotTable analysis. Once merged, you can use our PivotTable generator to create dynamic summaries.
Merge exported data from legacy systems saved as multiple Excel files. The "Combine Sheets" option preserves original worksheet structures during consolidation.
This tool processes Excel files using the SheetJS library and outputs standard .xlsx format compatible with:
Before merging, ensure all files have consistent column structures for append operations. For best results:
The tool focuses on data consolidation rather than visual formatting:
For full formatting preservation, consider using Excel's native "Combine Workbooks" feature or Power Query.
After downloading your merged file, you can:
All processing occurs locally in your browser using JavaScript. No files are uploaded to external servers, ensuring sensitive business data, financial records, or personal information never leaves your computer. This approach complies with data protection regulations like GDPR and maintains complete confidentiality.
Browser memory limits apply (typically 500MB-2GB total). For very large datasets exceeding 100,000 rows, consider using Excel's Power Query or splitting into multiple merge operations.
No. You must remove password protection from encrypted Excel files before using this tool, as client-side JavaScript cannot decrypt protected workbooks. Our worksheet protection tool can help with unlocked files.
Not directly. Convert CSV files to Excel format (.xlsx) first using our CSV to Excel converter, then merge the converted files.
Merged cells are unmerged during processing, with the value placed in the top-left cell of the original merged range. This prevents data loss during row/column operations.
Yes, cell hyperlinks are preserved in the merged output when using the default options.
This tool complements other spreadsheet utilities available on our site, helping you build a complete data preparation pipeline. After merging, you might need to split a combined dataset or validate its integrity:
Last updated: June 2025 | Tested with Excel 365, Excel 2021, and Excel Online. The merging logic follows standard spreadsheet data consolidation principles used in business intelligence workflows.