Merge CSV files
Files are processed in your browser and are not sent to our server.
FREE WEB TOOL
Merge multiple CSV files with matching headers.
Files are processed in your browser and are not sent to our server.
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.