CSV/Excel Batch Merger

Merge multiple Excel or CSV files instantly. Reorder, skip headers, and export to a single file.

Click or Drag to Upload Files

Supports .csv, .xlsx, .xls formats

Selected Files ()

If checked, only the header of the 1st file is kept.

How to Use the CSV/Excel Merger

  1. Upload Files: Drop multiple .csv, .xlsx, or .xls files into the upload zone.
  2. Reorder: Use the arrow buttons in the file list to adjust the merge sequence.
  3. Set Options: Check "Skip Headers" to prevent duplicate header rows in the final output.
  4. Merge & Export: Click "Merge Files" to generate and download the combined Excel file.

Features

πŸ“‚ Multi-Format Support

Seamlessly merge CSV and Excel (.xlsx, .xls) files into one.

πŸš€ Flexible Ordering

Intuitive reordering tools ensure your data is combined exactly as you want it.

πŸ›‘οΈ Private & Secure

All processing happens in your browser. No data is ever uploaded to our servers.

Frequently Asked Questions

How many files can I merge?
There is no strict limit, but it depends on your browser's memory. Merging dozens or even hundreds of typical files works fine.
Can I mix CSV and Excel files?
Yes! Our tool parses all input files and standardizes them before merging into the final result.
What if the columns don't match?
The tool appends data row by row. For best results, ensure all files have the same column structure, otherwise data might be misaligned.
What does "Skip Headers" do?
When merging multiple similar files (e.g., monthly reports), each has a header row. Checking this ensures only the header from the first file is kept, and headers from subsequent files are removed.
What is the export format?
The default export format is standard Excel (.xlsx), compatible with Microsoft Excel, Google Sheets, and other office software.
Will special characters/languages break?
We use a robust parsing library that handles character encodings (like UTF-8) correctly, so multiple languages should be preserved safely.
Can I use this offline?
Yes. Once the page loads, you can use it even without an internet connection since all logic runs locally on your device.
Dates look weird in the output?
Excel often stores dates as numbers. After opening the merged file, simply select the column and change the cell format to "Date" in Excel to fix it.

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