CSV ↔ JSON Converter
Free online CSV to JSON converter. Convert CSV files to JSON and vice versa with custom delimiters, headers, data types. Bidirectional conversion with accurate type detection. Local browser processing, no signup.
How to Use CSV ↔ JSON Converter
- 1Paste CSV data or JSON data into the input area
- 2Select the conversion direction (CSV to JSON or JSON to CSV)
- 3Configure delimiter and header options if needed
- 4Click Convert to generate the output
- 5Copy or download the converted data
Frequently Asked Questions
What CSV delimiters are supported for conversion?
Comma, semicolon, tab, and pipe delimiters are all supported. The tool auto-detects the most common formats automatically, or you can manually specify your delimiter if your CSV uses something less common like a colon or space separator.
Does it handle quoted fields, line breaks, and special characters in cells?
Yes, standard CSV quoting rules following RFC 4180 are fully supported. Fields containing commas, quotes, newlines, and special characters are all handled correctly, so your data stays intact during conversion.
Does the converter detect data types like numbers and booleans?
Yes, the converter analyzes each column and infers appropriate data types. Numbers, booleans, dates, and null values are automatically detected and converted to the correct JSON types, rather than everything being treated as a string.
Is CSV ↔ JSON free, and do I need to sign up or upload my files?
CSV ↔ JSON is 100% free to use with no signup, no registration, and no usage limits. All processing happens locally in your browser - your files and data never leave your device, so no upload is required and your privacy is fully protected.