CSV ↔ JSON Converter
/csv-json-converterConvert CSV data to JSON arrays of objects, or JSON to CSV with automatic header generation.
APIs and databases speak JSON, but business users export CSV — bridging the two is a daily data task. This converter turns CSV into a JSON array of objects with automatic header detection, or flattens JSON back into CSV. It handles quoting, embedded commas, and line breaks correctly. Your data never leaves the page.
- 01Upload
- 02Configure
- 03Run
- 04Download
Loading tool...
FAQ
Frequently asked questions
Everything you need to know about csv ↔ json converter.
How are CSV headers handled?
The first row becomes the object keys when converting CSV to JSON, and object keys become the header row when converting JSON back to CSV.
Does this support quoted fields with commas?
Yes. The PapaParse parser handles quoted fields, escaped quotes, and multiline values correctly in both directions.
Which JSON shapes can become CSV?
An array of objects or a single object. Nested objects are serialized as their JSON text inside the cell, since CSV is flat.
Why did I get a CSV parse error?
The parser reported a structural problem, usually mismatched quotes or an unexpected character in a row. Inspect the line and fix the quoting.
Can I switch directions quickly?
Yes. The Swap button puts the current result back into the input and flips the mode between CSV to JSON and JSON to CSV.
Is my data sent anywhere?
No. Conversion is performed locally in the browser, so datasets of any sensitivity stay on your device.
Related tools
same category · same privacy