Free CSV to JSON Converter

How to Convert CSV to JSON Online

Paste your CSV data into the left panel and the JSON output appears instantly on the right. The first row is used as column headers (object keys). Each subsequent row becomes a JSON object. You can also drag and drop a .csv file or use the upload button. Download the result as a .json file.

Common CSV to JSON Use Cases

Converting CSV to JSON is useful when importing spreadsheet data into web applications, preparing data for REST APIs, loading CSV exports into NoSQL databases, or transforming tabular data for use in JavaScript, Python, or other programming languages that work natively with JSON.

Frequently Asked Questions

How does CSV to JSON conversion work?

The first row of your CSV is used as column headers (keys). Each subsequent row becomes a JSON object with those keys. The result is a JSON array of objects.

Does it handle quoted values?

Yes — values containing commas, quotes, or newlines are handled correctly per RFC 4180. Quoted fields are unquoted automatically.

Does it auto-detect types?

Yes — numbers and booleans are automatically converted to their JSON types. For example, "42" becomes 42 (number) and "true" becomes true (boolean). Strings remain as strings.

Is this converter free?

Yes — completely free, forever. No sign-up, no account, no usage limits.

Is my data safe?

All conversion happens locally in your browser using JavaScript. Your CSV is never uploaded to any server. It's safe to use with sensitive or proprietary data.

Can I convert JSON back to CSV?

Yes — use the JSON to CSV converter to convert a JSON array back to CSV.