The Data Transmuter
JSON to CSV. CSV to JSON. Instant.
How it works
Paste your Input Data (JSON or CSV).
Click the Convert button.
Copy the Clean Output.
Why it matters
Data formats are messy. Sometimes you need a spreadsheet, sometimes you need an API payload.
This tool runs entirely in your browser. Your data is never sent to a server.
The Logic
JSON to CSV: Flattens the object array,
extracts unique keys as headers, and maps values to rows.
CSV to JSON: Parses the header row, then
maps each subsequent row to an object using those keys.