Dev Tool

CSV to JSON Converter

Convert CSV data to JSON and JSON arrays back to CSV instantly. Runs entirely in your browser — no data is uploaded.

Delimiter: First row as headers Pretty print JSON Trim whitespace

Input0 rows

Output—

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Instant conversion

Paste CSV and get JSON in milliseconds. Handles thousands of rows without slowing down.

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Two-way conversion

Convert CSV to JSON or JSON arrays back to CSV — both directions supported.

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100% private

All processing happens in your browser. Your data never touches any server.

Frequently Asked Questions

What CSV formats are supported?

Any standard CSV with comma, semicolon, tab or pipe delimiters. Quoted fields with embedded delimiters or newlines are handled correctly. The first row can optionally be treated as a header row.

What if my CSV has special characters?

Fields containing the delimiter, quotes, or newlines should be quoted in the CSV. Our parser handles standard RFC 4180 quoting correctly.

What is the maximum file size?

There is no server-side limit since everything runs in your browser. Performance depends on your device — most modern computers can handle CSVs with 100,000+ rows in seconds.

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