CSV to JSON Converter

Delimiter

Custom delimiter

Output format

First row is headers Auto-detect types (numbers, booleans) Minify output

CSV input

JSON output

When to use CSV to JSON

API development — feed test data from a spreadsheet into a REST API without manual reformatting
Database seeding — convert exported CSV records to JSON for NoSQL database imports (MongoDB, Firestore)
Frontend prototyping — turn sample data from Excel into a JSON file you can fetch in a React/Vue app
Data migration — convert legacy CSV exports to JSON format for modern applications
Chart libraries — Chart.js, D3, and Highcharts all work natively with JSON data arrays

Frequently Asked Questions

By default, every CSV value is a string. Auto-detect converts values that look like numbers (42, 3.14), booleans (true/false, yes/no), and null (empty, null, "null") to their native JSON types. This is almost always what you want for API or database use. Turn it off if you need all values to remain as strings — for example, if you have ZIP codes like "01234" that would otherwise lose their leading zero.

No — this parser handles RFC 4180 standard CSV. Values containing commas should be wrapped in double quotes: "New York, NY". Values containing double quotes should escape them as "": "He said ""hello""". If your CSV was exported from Excel or Google Sheets, it will already follow this format correctly.

Not directly on this page — this tool is one-directional (CSV → JSON). For JSON to CSV, paste your JSON into our JSON Formatter to validate and inspect the structure first, then use a dedicated JSON-to-CSV tool. Alternatively, load the JSON into JavaScript, use Object.keys() to get headers, and join values with commas.