Convert CSV data to JSON array of objects. Headers become keys.
CSV to JSON is a free, browser-based tool designed for developers, designers, writers, and everyday users. Convert CSV data to JSON format instantly. Supports headers, custom delimiters, and nested objects. Free online CSV to JSON converter. Everything runs locally in your browser using JavaScript — no data is ever sent to a server, making it completely private and secure. The tool is designed to be intuitive and beginner-friendly while still offering advanced features for power users. It loads instantly with no installation required and works offline once loaded. Use it as often as you need — there are no daily limits, no watermarks, and no hidden fees.
Yes! CSV to JSON is completely free with no signup required. It runs entirely in your browser — your data never leaves your device.
Enter your data in the input fields above. Results are generated instantly in your browser. You can copy, download, or share the output.
Absolutely. CSV to JSON runs 100% client-side in your browser using JavaScript. No data is uploaded, stored, or shared with any server. Your privacy is guaranteed.