JSON + CSV Merger (Join by Key)

You have user records in JSON and account info in CSV; combine them on email or id. This tool joins a JSON array with a CSV by a common key, producing enriched output in either format. Like a poor-man's SQL JOIN, runs in your browser.

How to use the JSON + CSV Merger (Join by Key)

Paste a JSON array and a CSV. Pick the join key in each. Click Merge. Output combines fields from both records where the keys match.