JSON to CSV Converter API

Convert JSON arrays (nested objects flattened) to CSV and CSV to JSON with auto delimiter detection, quoted fields and numbers.

Authentication & base URL

Subscribe through one of our marketplace listings; your marketplace API key and base URL are shown there. All endpoints return JSON over HTTPS, served from a global edge network (typically 20–150 ms).

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Endpoints

POST `/v1/convert/json-to-csv`

JSON to CSV

Request body: application/json

Parameter	In	Description	Example
`delimiter`	query	Delimiter	`,`

POST `/v1/convert/csv-to-json`

CSV to JSON

Request body: text/plain

Parameter	In	Description	Example
`delimiter`	query	Delimiter (auto if empty)

Example

POST /v1/convert/csv-to-json?delimiter=

name,age
Ana,30

{
  "rows": [
    {
      "name": "Ana",
      "age": 30
    }
  ]
}

Convert JSON arrays (nested objects flattened) to CSV and CSV to JSON with auto delimiter detection, quoted fields and numbers.

Use cases

Exporting API data to Excel/Sheets, importing spreadsheets into apps, ETL and no-code automations.

Why this API

Fast: runs on a global edge network, typical response well under 1 second.
Reliable: simple JSON, clear error messages.
Fair pricing: Free plan 500 requests/month, Pro 25,000 for $4.99, Ultra 150,000 for $14.99.

Pricing

Free plan with 500 calls per month, then Pro (25,000 calls for $4.99/month) and Ultra (150,000 calls for $14.99/month). See all plans.