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JSON ↔ CSV Converter

Convert between JSON and CSV formats instantly. Use the web interface or integrate via our simple REST API.

REST API

POST/api/json-to-csv

Convert JSON array to CSV string

curl -X POST \
  https://convertjson-ashen.vercel.app/api/json-to-csv \
  -H "Content-Type: application/json" \
  -d '{"data": [{"name": "Alice"}]}'
POST/api/csv-to-json

Convert CSV string to JSON array

curl -X POST \
  https://convertjson-ashen.vercel.app/api/csv-to-json \
  -H "Content-Type: application/json" \
  -d '{"csv": "name,age\nAlice,30"}'

No limits

Convert unlimited data with no file size restrictions.

Privacy first

Data is processed in-memory and never stored on our servers.

Always free

No signup, no API keys, no usage limits. Just convert.