CSV to JSON Converter

Q: Are numbers converted or kept as strings?

Numbers and booleans are converted by default. Send `dynamic_typing=false` to keep all values as strings (useful for zip codes or IDs with leading zeros).

Q: What if my CSV has no header row?

Set `header=false`; each row is then returned as an array and `fields` is null.

Convert CSV into an array of JSON objects using the header row, with delimiter auto-detection, number and boolean typing, and row-level errors.

Result

Press “Run” to see the result.

Send CSV text in the csv field or as a raw text/csv / text/plain body. By default the first row is used as header and each following row becomes an object (rows), with fields listing the column names. Set header=false to get arrays of values instead.

The delimiter (comma, semicolon, tab, pipe...) is detected automatically, or forced with delimiter. Numbers and booleans are converted to JSON types (dynamic_typing, on by default); set dynamic_typing=false to keep every value as a string. Quoted fields with commas and line breaks are handled, and empty lines are skipped.

The response also includes row_count, the delimiter used and up to 50 parse errors (row, message, code), such as rows with too few fields. The request body is limited to 5 MB.

Use this in your code

curl -X POST "https://apibox.io.vn/v1/csv-to-json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"csv":"name,age,city\nAlice,30,Hanoi\nBob,25,\"Ho Chi Minh City\""}'

const res = await fetch('https://apibox.io.vn/v1/csv-to-json', {
  method: 'POST',
  headers: {
    Authorization: 'Bearer YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "csv": "name,age,city\nAlice,30,Hanoi\nBob,25,\"Ho Chi Minh City\""
  }),
});
const data = await res.json();
console.log(data);

import requests

res = requests.post(
    "https://apibox.io.vn/v1/csv-to-json",
    headers={"Authorization": "Bearer YOUR_API_KEY"},
    json={"csv": "name,age,city\nAlice,30,Hanoi\nBob,25,\"Ho Chi Minh City\""},
    timeout=30,
)
print(res.json())

<?php
$ch = curl_init('https://apibox.io.vn/v1/csv-to-json');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => 'POST',
    CURLOPT_HTTPHEADER => ['Authorization: Bearer YOUR_API_KEY', 'Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"csv":"name,age,city\\nAlice,30,Hanoi\\nBob,25,\\"Ho Chi Minh City\\""}',
]);
$response = curl_exec($ch);
print_r(json_decode($response, true));

API documentation → Get a free API key

FAQ

Is the delimiter detected automatically?

Yes. Comma, semicolon, tab and other common delimiters are detected; use delimiter to force one.

Are numbers converted or kept as strings?

Numbers and booleans are converted by default. Send dynamic_typing=false to keep all values as strings (useful for zip codes or IDs with leading zeros).

What if my CSV has no header row?

Set header=false; each row is then returned as an array and fields is null.