CSV to JSON Converter

Convert CSV into a clean JSON array of objects. RFC 4180 parsing, header detection, optional type inference — all in your browser.

🔒 Runs entirely in your browser — your data never leaves this device. How we verify this.
Also try: JSON to CSV Scenarios All Tools

How to Convert CSV to JSON

  1. Paste your CSV into the input editor (or a tab/semicolon-separated file — pick the delimiter).
  2. Choose options. Keep "First row is header" on to use column names as keys; toggle type inference for numbers/booleans/null.
  3. Click "Convert to JSON". You get a JSON array of objects, plus a live preview of the parsed rows.
  4. Download or copy the JSON.

FAQ

Is my data secure?

Yes. All parsing runs in your browser (with a Web Worker for large files). After the page's static assets finish loading, clicking Convert makes no network request and your input is never uploaded — verify it yourself in DevTools (F12) → Network. This is an ad-free, tracker-free tool page.

Does it handle quoted fields and commas inside values?

Yes — the parser is RFC 4180 compliant: quoted fields, escaped "" quotes, and embedded commas or newlines are all handled.

Are numbers and booleans converted?

Optionally. With type inference on, 30 becomes a number and true/false/null become their JSON types. Turn it off to keep every value as a string.