ConvertTOONConvertTOON

Convert CSV to JSON Online

Convert CSV data to JSON array format. Free online CSV to JSON converter with automatic type detection.

🔒 100% Client-side⚡ Instant🆓 Free forever

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About Convert CSV to JSON Online
Convert CSV data to JSON array format. Free online CSV to JSON converter with automatic type detection. This tool is part of the ConvertTOON developer tools suite, providing 40+ free online utilities for developers.
All processing happens entirely in your browser — your data never leaves your device. No sign-up required, no data collection, completely free and private.
💡 Looking for more tools? Visit ConvertTOON.com for JSON to TOON conversion, batch processing, and 40+ developer tools.
How to Convert CSV to JSON
  1. Paste your CSV data in the input panel
  2. The JSON output is generated automatically
  3. Click “Copy” to copy the result to clipboard
  4. Or click “Convert” to manually trigger conversion
Converting CSV spreadsheet data to JSON format enables integration with modern APIs, JavaScript applications, and NoSQL databases. This tool automatically detects headers and converts each row to a JSON object.
Frequently Asked Questions
Is my data secure?
Yes. All conversion happens 100% in your browser using JavaScript. No data is ever sent to a server.
Is there a file size limit?
The tool handles files up to several MB comfortably. For very large files, consider using our batch converter or API.
Can I use this programmatically?
Yes! We offer a free REST API at /api/convert/csv-to-json and an NPM package for Node.js integration.
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