Paste or type CSV on the left and Reformatr writes the equivalent JSON on the right as you type. Input is validated, errors are reported inline, and the whole conversion happens locally in your browser - your data is never sent to a server.

How CSV to JSON conversion works

• Paste, type or drop CSV into the input pane.
• JSON is produced as you type, with syntax errors reported inline.
• Copy the JSON output, or download it as a file.
• Everything runs in your browser - your data never leaves the page.

Going the other way? Use the JSON to CSV converter.

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