Merge CSV files into one — free
Combine two or more CSVs into a single file. Columns are matched by header name automatically — even if the files have different columns. No signup, and your files are processed privately in your browser.
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Drop your CSV files here
or click to browse — add as many as you like
🔒 Nothing is uploaded or stored — the merge happens on your device.
Merging product exports for a new store? Use the free
CatalogPort converter to reformat the merged CSV for Shopify, WooCommerce, Amazon, Etsy and more.
Need the opposite? Split a big CSV · Importer rejecting your file? Fix a CSV.
Why merge CSV files? Sellers often have several exports — supplier feeds, batch downloads, or one file per category — that need to become one clean import file. This tool stacks them into a single CSV, matching columns by header so nothing lands in the wrong field, and fills blanks where a file doesn’t have a column.