Are large CSV files supported?

Yes, but extremely large files (50MB+) might slow down your browser. We recommend staying under 10MB for the best experience.

What CSV delimiters are supported?

The tool automatically detects commas, semi-colons, and tabs.

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CSV to JSON Converter

FmtDev CSV to JSON Converter is a free, browser-based tool that convert CSV files to JSON format instantly. It runs entirely on your device with zero data transmission, making it safe for proprietary code and sensitive content.