Toolorio

CSV to JSON Converter

Paste CSV data to convert it into a JSON array of objects, using the header row as the keys.

Your files are processed locally in your browser. They are not uploaded to our servers.

How to use

  1. Paste your CSV data, including the header row, into the input box.
  2. Click Convert to JSON.
  3. Copy the resulting JSON.

What is this tool?

CSV to JSON Converter parses CSV text, including quoted fields with commas, and turns each row into a JSON object using the header row as the property names. It auto-detects the delimiter (comma, semicolon, tab or pipe), lets you toggle whether the first row is a header, and shows a table preview before you copy or download the JSON. The conversion runs entirely in your browser using JavaScript.

Common uses

  • Turning a spreadsheet export into JSON for an API or script
  • Converting a CSV data file into JSON for a test fixture
  • Preparing CSV data for import into a JSON-based database
  • Quickly inspecting the structure of a CSV file as JSON

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FAQ

Does it handle quoted fields with commas inside them?

Yes, fields wrapped in double quotes can contain commas and line breaks and are parsed correctly.

Does it work with semicolon or tab-separated files?

Yes, the delimiter is auto-detected, or you can pick comma, semicolon, tab or pipe manually.

What happens if a row has fewer columns than the header?

Missing values are filled in as empty strings.

Is my data sent to a server?

No, the conversion runs entirely in your browser using JavaScript — nothing you paste in is ever uploaded.