CSV ⇄ JSON Converter

Convert CSV to JSON and JSON to CSV instantly. Works offline.

CSV ⇄ JSON Converter Fast, Secure and Fully Offline Data Conversion CSV ⇄ JSON Converter is a lightweight Chrome extension that allows you to instantly convert CSV files to JSON and JSON files to CSV directly inside your browser. No uploads. No tracking. No external servers. Features Convert CSV to JSON Convert JSON to CSV Drag and drop file support Instant preview of converted output Download converted file Copy output with one click Light and Dark mode support Smooth processing using Web Worker 100% Offline and Privacy Focused This extension is built with a security-first approach. It does NOT upload files. It does NOT connect to external APIs. It does NOT collect user data. It does NOT track usage. It does NOT require login. It does NOT request unnecessary permissions. All file processing happens locally inside your browser. Your data never leaves your device. How It Works Open the extension. Drag and drop a CSV or JSON file. Select the conversion mode. Click Convert. Download or copy the result. Simple. Fast. Secure.