CSV ↔ JSON Converter
5 toolsConvert CSV to JSON and back.
Runs in your browser — your files and text stay on your device
A complete converter toolkit — length, weight, temperature, area, volume, speed, data storage, time, and pressure units, plus number bases, CSV/JSON, Roman numerals, and cooking measurements. All in one place, entirely client-side.
Output
How to convert between CSV and JSON
- 1Choose a direction.
- 2For CSV → JSON: paste CSV with a header row.
- 3For JSON → CSV: paste a JSON array of flat objects.
- 4Copy the result on the right.
Frequently asked questions
Does the CSV parser handle quoted fields?
Yes — quoted fields can contain commas or line breaks, with escaped quotes handled correctly.
What JSON shape does JSON → CSV expect?
A flat array of objects; nested objects/arrays aren't supported.
Is my data uploaded anywhere?
No — parsing happens entirely in your browser.