CSV ↔ JSON

Convert CSV rows to JSON, or JSON records back to CSV, in your browser.

Processed on your device. Inputs are not uploaded.

Operation

InputOutput

Runs locally in a background worker

How to use

Paste a CSV with a header row, or a JSON array of records, and choose the conversion direction.

Convert name,score followed by Ada,99 into a JSON record.

Up to 2 MB of text. JSON to CSV escapes formula-like cells for safer spreadsheet use. Nested records are not flattened.

Your input stays in browser memory while you use this page. It is not uploaded or saved. Downloads are saved only when you choose to save them.