Join CSV Files
Join two CSV files together using matching key columns. Fast, free, and fully client-side.
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How the Join CSV Files Works
Joins two CSV files on a common key column using SQL-style INNER JOIN, LEFT JOIN, RIGHT JOIN, or FULL OUTER JOIN operations.
Usage Example
Combine a customer order CSV with a customer profile CSV on `customer_id`.
Frequently Asked Questions
What join types are supported?
Inner Join (matches only), Left Join (all rows from first file), Right Join (all rows from second file), and Full Outer Join (all rows from both).
Browse more
See all CSV tools.