CSV Joiner Online · LocalKit

Join two CSV tables on selected columns using exact string keys. Duplicate keys generate all matching row combinations. Free csv joiner online, with no installation or account.

Tool capabilities

Input: TXT
Output: TXT · JSON

How to use CSV Joiner

Join two CSV tables on selected columns using exact string keys. Duplicate keys generate all matching row combinations. This csv joiner works directly in your browser and is free to use without an account.

Paste or open your input in the editor.
Run the tool and inspect the output. If the input is invalid, correct the reported error and run it again.
Copy the result or download it to your device.

CSV Joiner · Example

Input

name,team,score
Alex,blue,10
Mina,red,20
Alex,blue,5

Output

left.name,left.team,left.score,right.name,right.team,right.score
Alex,blue,10,Alex,blue,15
Mina,red,20,Mina,red,30
Alex,blue,5,Alex,blue,15

Join two CSV tables on selected columns using exact string keys. Duplicate keys generate all matching row combinations.

Usage notes

Inputs and results are processed on this device. Tool content is not sent to a processing server.

CSV Joiner