How to use this office tool
- Select or drop two to ten spreadsheet files at once.
- Confirm the detected files; the first worksheet from each source will be used.
- Merge the files and download the new workbook containing one sheet per source.
#004 · Merge Split & Organize Tool
Merge Excel Files
Combine the first selected worksheet from multiple Excel or CSV files into one workbook with a separate sheet for each source.
Office File Tool
Two to ten filesrow
rows
Ad space
What this tool does
Each selected file contributes one worksheet to a newly generated workbook. Sheet names are derived from safe, unique source filenames.
Selected files → first worksheet from each file → uniquely named sheets → new XLSX workbook
This browser-safe merge copies cell values and formulas supported by SheetJS. Advanced workbook objects and macros are not preserved.
Supported formats
Files are processed in memory on this device. Large or structurally complex workbooks may require desktop spreadsheet software.
| Input | Support |
|---|---|
| XLSX / XLS | Parsed locally with SheetJS CE |
| CSV / TSV | Supported with delimiter-aware parsing |
| Limits | 25 MB per file, bounded preview, up to 500,000 used cells |
Tips for better results
- Use concise filenames; they become worksheet names.
- Ensure each source opens normally before merging.
- Use a row-append tool instead when tables need to become one dataset.
FAQ
How are source files arranged in the merged workbook?
The first worksheet from each file becomes a separate worksheet in the new workbook.
What happens when two source files have the same name?
The tool creates safe, unique worksheet names by adding a number when necessary.
Does this merge rows into one continuous table?
No. It keeps sources on separate sheets. Use an append or combine-by-rows tool when all files share one table structure.
How many files can I merge at once?
This page accepts between two and ten files, with a per-file browser safety limit shown during validation.
Are macros and complex Excel objects preserved?
No. VBA, charts, slicers, Power Query, and other advanced workbook objects are outside this browser-safe merge scope.
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Processing details
| Processing detail | Behavior |
|---|---|
| Browser processing | No file upload |
| Preview | 5–100 rows |
| Output | New generated file |
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