Merge CSV Files
Merge multiple CSV files into one in seconds. Works entirely in your browser.
Drop your CSV files here
or click to browse — supports .csv, .tsv, .txt
Your files never leave your device.
Merge CSV Files Online — Fast & Private
Use this free tool to merge CSV files online. Combine two CSV files into a single merged CSV in seconds without Excel or scripts.
This merge CSV tool runs entirely in your browser, so your files never leave your device. It's fast, private, and works on any modern browser.
Choose strict header matching for clean merges, or use union mode to merge CSV files with different columns.
Frequently Asked Questions
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