What is the output JSON format?

Each row becomes a JSON object with column names as keys, and all rows are wrapped in a top-level JSON array.

Can I convert large CSV files?

Yes. Conversion is done client-side and can handle large files within available browser memory.

Does it handle quoted fields and commas within fields?

Yes. Standard CSV escaping rules — quoted fields containing commas, newlines, or double quotes — are supported.

Is the converted data uploaded anywhere?

No. The entire conversion happens in your browser. Neither the input CSV nor the output JSON is sent to any server.

CSV to JSON Converter

Upload or drop a CSV and download it as JSON instantly.

Local processing only — your data never leaves the browser.

Convert CSV to JSON — free and local

Convert CSV files to JSON format instantly with local browser processing. Supports standard CSV with headers, and outputs clean JSON arrays. Useful for transforming data between APIs, databases, and ETL pipelines — with no data ever leaving your machine.

Frequently Asked Questions

What is the output JSON format?: Each row becomes a JSON object with column names as keys, and all rows are wrapped in a top-level JSON array.
Can I convert large CSV files?: Yes. Conversion is done client-side and can handle large files within available browser memory.
Does it handle quoted fields and commas within fields?: Yes. Standard CSV escaping rules — quoted fields containing commas, newlines, or double quotes — are supported.
Is the converted data uploaded anywhere?: No. The entire conversion happens in your browser. Neither the input CSV nor the output JSON is sent to any server.