How to use it

  1. Paste JSON, open a file, or try the sample. Broken JSON gets a plain explanation and points at the exact line and column.
  2. Pick pretty or minified output, the indent you like, and whether to sort the keys.
  3. Switch to JSON to CSV or CSV to JSON to convert, then copy or download the result.

What it’s for

Reading an API response that arrives as one long line, finding the missing comma that breaks a config file, or turning a list of records into a CSV you can open in Excel or Google Sheets (and back again). Your data is never sent anywhere, so it is fine to paste things you would not want to upload.