Merge CSV Files
Merge multiple CSV files vertically into a single output. Fast, free, and fully client-side.
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How the Merge CSV Files Works
Merges and concatenates multiple CSV files with identical or overlapping headers into a single unified CSV document.
Usage Example
Combine 12 monthly sales CSV files into an annual summary dataset.
Frequently Asked Questions
What happens if files have different column orders?
Columns with matching names are automatically aligned regardless of column position in individual files.
Browse more
See all CSV tools.