CSV to JSON Converter

Overview

CSV to JSON Converter works by parsing CSV data and converting it into JSON objects. It automatically detects columns, handles quoted values, and supports custom delimiters. Maximum file size is 500KB.

Endpoint

One host, one path per API. The block below shows this call in four languages; every one of them is the same HTTP request. Making requests covers the timeouts, retries and parameter rules that apply to all of them. The SDKs wrap the same call in a typed client.

curl -X POST https://api.apiverve.com/v1/csvtojson \
  -H "x-api-key: your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
  "csv": "name,age,city\nJohn Doe,30,New York\nJane Smith,25,Los Angeles",
  "delimiter": ",",
  "has_header": true
}'

const res = await fetch('https://api.apiverve.com/v1/csvtojson', {
  method: 'POST',
  headers: {
    'x-api-key': 'your_api_key_here',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
  "csv": "name,age,city\nJohn Doe,30,New York\nJane Smith,25,Los Angeles",
  "delimiter": ",",
  "has_header": true
}),
});

if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);

const { data } = await res.json();
console.log(data);

import requests

res = requests.post(
    "https://api.apiverve.com/v1/csvtojson",
    headers={"x-api-key": "your_api_key_here"},
    json={
    "csv": "name,age,city\nJohn Doe,30,New York\nJane Smith,25,Los Angeles",
    "delimiter": ",",
    "has_header": True
},
    timeout=15,
)
res.raise_for_status()

print(res.json()["data"])

package main

import (
	"fmt"
	"io"
	"net/http"
	"strings"
)

func main() {
	body := strings.NewReader(`{
  "csv": "name,age,city\nJohn Doe,30,New York\nJane Smith,25,Los Angeles",
  "delimiter": ",",
  "has_header": true
}`)
	req, _ := http.NewRequest("POST", "https://api.apiverve.com/v1/csvtojson", body)
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("x-api-key", "your_api_key_here")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	out, _ := io.ReadAll(res.Body)
	fmt.Println(string(out))
}

Replace your_api_key_here with the key from your dashboard. When the inputs arrive as a list rather than one at a time, batch requests run up to 200 of them through this same API in a single call.

Authentication

Send your key in the x-api-key header. That is the only auth step — there is no token exchange and no per-endpoint scope to configure. Authentication covers creating, rotating and revoking keys.

Parameters

Sent as JSON in the request body. Premium parameters are accepted on every plan but only take effect on plans that include them.

Response

Every API returns the same three top-level keys, so one response handler covers your whole integration: status, error and data. Only data changes shape. Response format covers the envelope, the other output formats and how premium fields are withheld.

{
  "status": "ok",
  "error": null,
  "data": {
    "row_count": 2,
    "column_count": 3,
    "columns": [
      "name",
      "age",
      "city"
    ],
    "inferredTypes": {
      "name": "string",
      "age": "integer",
      "city": "string"
    },
    "json": [
      {
        "name": "John Doe",
        "age": "30",
        "city": "New York"
      },
      {
        "name": "Jane Smith",
        "age": "25",
        "city": "Los Angeles"
      }
    ]
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Errors

Read the HTTP status first, then error for the specific reason. The body names the parameter that has to change. Error handling covers the full status list and which of them are worth retrying.

Use cases

Data Migration

Convert CSV exports from legacy systems to JSON format for modern API integration and database imports

API Integration

Transform CSV data into JSON format for RESTful API consumption and web application processing

Data Analysis

Convert CSV datasets to JSON for easier manipulation in JavaScript, Python, or data analysis tools

File Processing

Automate batch conversion of CSV files to JSON for data pipelines and ETL workflows

Other ways to use CSV to JSON Converter

Set up CSV to JSON Converter on APIVerve, or reach the same source a different way. Your APIVerve account and credits work on all of them — one key, one balance.

Related

More in Data Conversion: