MergeMyCSV - Combine CSV Files Online

The fastest way to merge two CSV files into one

Merge CSV Files

Features of Our CSV Merger Tool

How to Merge CSV Files

  1. Upload your CSV files using the selector above
  2. Configure merge options if needed
  3. Click "Merge Files" button
  4. Automatically download your merged CSV file

Frequently Asked Questions

Is MergeMyCSV free to use?

Yes, MergeMyCSV is completely free with no limitations on file size or number of merges.

Is my data secure when using MergeMyCSV?

Absolutely. All processing happens in your browser - your files are never uploaded to our servers.

What's the maximum file size I can merge?

The limit depends on your browser and device memory. Most modern browsers can handle files up to several hundred MB.

Can I merge CSV files with different columns?

No, our tool only works with CSV files that have the same column names and structure.