Merge Excel Files
Combine multiple Excel (.xlsx, .xls) and CSV files into a single workbook. Different column schemas are handled with union merge.
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Drop files here or click to browse
Supports .xlsx, .xls, .csv — multiple files
How to Merge Excel Files
- Select or drag your Excel (.xlsx, .xls) or CSV files into the upload area above.
- Click Merge Files. Processing happens instantly in your browser.
- Download the merged
merged_data.xlsxfile.
Common Use Cases
- Consolidate monthly sales reports from different regions into one file.
- Combine data exports from multiple systems for analysis.
- Merge Excel files with different column schemas without losing any data.
- Track data origin with auto-added
Source_FileandSource_Sheetcolumns.
Frequently Asked Questions
Are my files uploaded to a server?
No. All processing happens entirely in your browser using JavaScript. Your files never leave your device.
What if the files have different columns?
DataMani performs a union merge — the output contains all columns from all files. Columns missing in a particular source are filled with empty values.
Can I mix Excel and CSV files?
Yes. You can merge .xlsx, .xls, and .csv files together in a single operation.