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CSV merger

Merge multiple CSV files with matching headers.

Merge CSV files

Files are processed in your browser and are not sent to our server.

About this tool

CSV merger is a free online utility from BlueprintLab Tools. Merge multiple CSV files with matching headers.

Use it when you need to inspect, compare, clean, or transform CSV and structured data quickly.

No account is required. The tool is designed to complete the task directly in your browser with a short input → process → result flow.

How to use

  1. Enter or choose ＋ choose multiple csv files.
  2. Enter the required values.
  3. Run the tool and review, copy, or use the result.

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