CSV ↔ JSON Converter

Convert CSV spreadsheets to JSON arrays and back.

Free · Runs in your browser · Last updated 2026-05-03

Delimiter First row is header

CSV

JSON

About this tool

Parse CSV with quoted fields and custom delimiters into a JSON array of objects, or render JSON back as CSV with auto headers.

Privacy

All processing for CSV ↔ JSON happens locally inside your browser using JavaScript. Your input is never uploaded to a server, logged, or shared with third parties.

Frequently asked questions

Is the CSV ↔ JSON free to use?

Yes. CSV ↔ JSON is completely free for both personal and commercial projects. There are no usage limits, no sign-up, and no premium tier.

Is my data safe when I use CSV ↔ JSON?

All processing happens locally in your browser using JavaScript. Your input is never uploaded to our servers, logged, or shared with any third party.

Does CSV ↔ JSON work offline?

Once the page has loaded, the tool runs entirely client-side. You can disconnect from the internet and it will keep working in the same browser tab.

Which browsers are supported?

CSV ↔ JSON works in all modern browsers, including the latest versions of Chrome, Firefox, Safari, Edge, Brave, and Opera, on desktop and mobile.

Do I need to install anything?

No. CSV ↔ JSON runs in any modern web browser with no installation, browser extension, or account required.

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