Excel/CSV Merger
Combine multiple Excel and CSV files into a single workbook
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🔒 Everything runs 100% in your browser. Your files and input are never uploaded to any server.
Merge several Excel (.xlsx, .xls) and CSV files into one Excel workbook. Choose whether to keep each file on its own sheet or stack all rows together on a single sheet.
How to use
- Drag and drop your Excel and CSV files, or click to select several at once.
- Pick a merge mode (keep separate sheets / combine into one sheet) and set the output file name.
- Click the "Merge" button to combine them.
- Download the finished Excel file.
FAQ
- What happens if two sheets have the same name?
- Duplicate names are automatically numbered, so no sheet is overwritten and all of them are preserved.
- Can I merge CSV and Excel files together?
- Yes. You can mix .xlsx, .xls, and .csv files and combine them all into a single Excel workbook.
- Are my files uploaded to a server?
- No. All merging happens entirely in your browser, and your data is never sent anywhere.