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Join CSV tables by key

Attach columns from a second CSV table using a shared key column.

How it works

Paste a table with a header row and select its delimiter.
Provide the second table, shared column name and join type.
Review the result and download the CSV or TSV file.

Related tools

Compare CSV tables

Match rows by a unique key and report added rows, removed rows and changed cells as JSON.

CSV to JSON

Convert a CSV table with headers into an array of JSON objects.

JSON to CSV

Convert an array of flat JSON objects into a CSV table.