Question 1

How does the tool handle columns that don't match between CSV files?

Accepted Answer

The tool intelligently matches columns by header name. If one file has columns that another doesn't, it will include all columns and fill missing values with empty cells. You can also manually map columns before merging. Your files are processed entirely in your browser and never uploaded to any server.

Question 2

Can I merge very large CSV files?

Accepted Answer

Yes, the tool handles large CSV files efficiently using browser-based processing. Files with hundreds of thousands of rows can be merged, though performance depends on your device's memory. For optimal results, modern browsers and devices are recommended. Your files are processed entirely in your browser and never uploaded to any server.

Question 3

What file formats are supported besides CSV?

Accepted Answer

In addition to standard CSV files, the tool supports TSV (tab-separated values) and other delimited text files. You can specify custom delimiters if your data uses a different separator. The merged output can be downloaded as CSV. Your files are processed entirely in your browser and never uploaded to any server.

Merge CSV Files

Drop CSV files here or click to browse

Merge Options

Files Merged!

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Handle Mismatches

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Merge CSV Files

Drop CSV files here or click to browse

Merge Options

Files Merged!

Stack or Join

Handle Mismatches

100% Private

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