toolvio.

CSV to JSON converter

Convert CSV or TSV into a JSON array, with automatic delimiter detection.

CSV
JSON

Runs locally in your browser. Nothing is uploaded.

How to use

  1. Paste CSV, the first row is treated as headers.
  2. Delimiter is detected; override it if needed.
  3. Copy or download the JSON.

Questions

Are numbers converted?

With “Convert numbers” on, values that look like numbers become JSON numbers, and true/false become booleans.