json2csv

What is json2csv?

The json2csv npm package is a powerful tool for converting JSON data to CSV format. It is widely used for data transformation and export tasks, making it easier to handle JSON data in a tabular format.

What are json2csv's main functionalities?

Convert JSON to CSV

This feature allows you to convert a JSON array into a CSV string. The code sample demonstrates how to use the `parse` function from the json2csv package to transform a JSON array into CSV format.

const { parse } = require('json2csv');
const json = [{ "name": "John", "age": 30 }, { "name": "Jane", "age": 25 }];
const csv = parse(json);
console.log(csv);

Customizing CSV Fields

This feature allows you to specify which fields to include in the CSV output. The code sample shows how to define a list of fields and pass them as options to the `parse` function.

const { parse } = require('json2csv');
const json = [{ "name": "John", "age": 30 }, { "name": "Jane", "age": 25 }];
const fields = ['name', 'age'];
const opts = { fields };
const csv = parse(json, opts);
console.log(csv);

Handling Nested JSON Objects

This feature allows you to handle nested JSON objects and flatten them into CSV format. The code sample demonstrates how to specify nested fields in the options to correctly map them to CSV columns.

const { parse } = require('json2csv');
const json = [{ "name": "John", "address": { "city": "New York", "state": "NY" } }, { "name": "Jane", "address": { "city": "San Francisco", "state": "CA" } }];
const fields = ['name', 'address.city', 'address.state'];
const opts = { fields };
const csv = parse(json, opts);
console.log(csv);

Other packages similar to json2csv

csv-writer

The csv-writer package provides a simple and flexible way to write CSV files. It supports writing both objects and arrays to CSV, and allows for customization of headers and field delimiters. Compared to json2csv, csv-writer focuses more on writing CSV files rather than converting JSON to CSV strings.

fast-csv

The fast-csv package is a comprehensive library for parsing and formatting CSV files. It offers high performance and a wide range of features, including support for streaming and handling large datasets. While json2csv is primarily focused on converting JSON to CSV, fast-csv provides more extensive functionality for working with CSV data in general.

papaparse

The papaparse package is a powerful CSV parser that can handle large files and supports various configurations for parsing and formatting. It is known for its speed and reliability. Unlike json2csv, which is mainly used for converting JSON to CSV, papaparse excels at parsing CSV files into JSON and other formats.

README

Convert json to csv

The module converts json into csv with column titles. It is the perfect partner for MongoDB and it works similar to mongoexport but in node.js. The code is written in CoffeeScript.

How to use

Install

npm install json2csv

Include the module and run

json2csv = require('json2csv');
json2csv.parse({data: someJSONData, fields: ['field1', 'field2', 'field3']});

Example

Example 1

var json2csv = require('json2csv');

var json = [
  {
    "car": "Audi",
    "price": 40000,
    "color": "blue"
  }, {
    "car": "BMW",
    "price": 35000,
    "color": "black"
  }, {
    "car": "Porsche",
    "price": 60000,
    "color": "green"
  }
];

var csv = json2csv.parse({
  data: json,
  fields: ['car', 'price', 'color']
});

fs.writeFile('file.csv', csv, function(err) {
  if (err) throw err;
  console.log('file saved');
});
  

The content of the "file.csv" should be

car, price, color
Audi, 40000, blue
BMW, 35000, black
Porsche, 60000, green

Example 2

Similarly to mongoexport you can choose which fields to export

var csv = json2csv.parse({      
  data: json
  fields: ['car', 'color']
})

Should result in

car, color
Audi, blue
BMW, black
Porsche, green

Testing

Requires mocha and should.

Run

make test

or

npm test

License

Copyright (C) 2012 [Mirco Zeiss](mailto: [e-mail])

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.