Csv To Ndjson API

POST https://api.findutils.com/api/tools/csv-to-ndjson/execute

Convert CSV into newline-delimited JSON (NDJSON, JSON Lines, .jsonl): one JSON object per line, keyed by the header row. Quoted fields, embedded line breaks and doubled quotes are read per RFC 4180; the delimiter is detected from the header when not given. Every value stays a string unless coerce is true, which turns true, false, null, an empty cell and plain numbers into JSON values while leaving leading zeros and integers of 2^53 or more as text. An empty header name becomes column_N and a duplicate gets a numeric suffix. A row wider than the header keeps the first N values and is reported by row number. Dotted header names are not rebuilt into nested objects.

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Request body

application/json

csv

string required

CSV text with a header row.
delimiter

string optional

Input field separator: ",", ";", "\t" or "|". Omit to detect it from the header line.
coerce

boolean optional

Turn true, false, null, empty cells and plain numbers into JSON values. Default false: every value is a string. Default false.
header

boolean optional

The first row holds the keys. Default true. When false, keys are column_1, column_2, ... Default true.

Example arguments

Verified

{
  "csv": "id,name\n1,Ada\n2,Linus"
}

curl -X POST https://api.findutils.com/api/tools/csv-to-ndjson/execute \
  -H "Content-Type: application/json" \
  -d '{
    "csv": "id,name\n1,Ada\n2,Linus"
  }'

const response = await fetch('https://api.findutils.com/api/tools/csv-to-ndjson/execute', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({"csv":"id,name\n1,Ada\n2,Linus"}),
});
const data = await response.json();

import requests

response = requests.post(
    "https://api.findutils.com/api/tools/csv-to-ndjson/execute",
    json={"csv":"id,name\n1,Ada\n2,Linus"},
)
data = response.json()

$ch = curl_init('https://api.findutils.com/api/tools/csv-to-ndjson/execute');
curl_setopt_array($ch, [
    CURLOPT_POST => true,
    CURLOPT_HTTPHEADER => ['Content-Type: application/json'],
    CURLOPT_POSTFIELDS => '{"csv":"id,name\n1,Ada\n2,Linus"}',
    CURLOPT_RETURNTRANSFER => true,
]);
$data = json_decode(curl_exec($ch), true);

Also an MCP tool

Call csv_to_ndjson from Claude, Cursor or any MCP client. Same arguments, same output.

https://mcp.findutils.com

MCP reference

Rate limit: 60 a minute, per IP
Auth: None
REST id: csv-to-ndjson
MCP name: csv_to_ndjson
Category: Data
Machine-readable: openapi.json · markdown.md

Request body

Example arguments

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