712Tools

CSV to JSON Converter

Convert CSV data to JSON — with auto-type coercion

🔒 100% in-browser🆓 Free forever⚡ No sign-up

Handles RFC 4180 quoting (double-quoted fields, escaped quotes as ""). Auto-detects numbers, booleans, and null.

How it works

  1. 1
    Paste your CSV

    Drop the CSV — comma, semicolon, or tab-separated. RFC 4180 quoting is respected.

  2. 2
    Set the options

    Toggle whether the first row is a header, and pick the delimiter if it's not a comma.

  3. 3
    Copy the JSON

    The output is pretty-printed with 2-space indent. Numbers and booleans are auto-coerced.

About CSV to JSON Converter

Free online CSV to JSON converter. Paste any CSV (comma, semicolon, or tab delimited) to get a clean JSON array. Handles RFC 4180 quoting, converts numbers and booleans, and preserves your header row. Runs entirely in your browser. CSV to JSON Converter on 712 Tools runs entirely inside your browser using modern JavaScript APIs — no server ever sees your data. That means instant results, complete privacy, and no upload limits.

Whether you need to convert csv data to json — with auto-type coercion for a debugging session, a quick sanity check, or a production incident, this tool is free to use as many times as you need. There are no watermarks, no sign-up, and no ads inside the tool itself.

Frequently asked questions

What does auto-coercion do?

Values that look like numbers become numbers, 'true'/'false' become booleans, 'null' becomes null. Everything else stays a string.

Does it handle quoted fields with commas?

Yes — full RFC 4180 support, including escaped double-quotes as "".

Can I convert JSON back to CSV?

Yes — use the JSON to CSV tool for the reverse direction.

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