A great library you can use to quickly write an array of objects to a CSV file using Node.js is objects-to-csv.

Many other libraries exist, of course. I found this useful for a project of mine where I had to generate a one-time CSV file, so I wrote this little tutorial.

Using a stream-based library like fast-csv might suits your needs in more performance-oriented applications.

Install it using:

npm install objects-to-csv

then require it in your Node.js code:

const ObjectsToCsv = require('objects-to-csv')

When you have an array of objects ready to write to CSV, initialize a new ObjectsToCsv object instance:

const csv = new ObjectsToCsv(list)

then call csv.toDisk(), passing the file you want to write to (relative to your app base path):

await csv.toDisk('./list.csv')

This is a promise-based API and I used await, so you need to call this inside an async function.

The column names in the CSV are automatically inferred from the object properties names.

Note that this command overwrites the existing content of the file. To append to that file, pass a second object with the append property set to true:

await csv.toDisk('./list.csv', { append: true })

Lessons in this unit:

0:	Introduction
1:	Axios crashes the Node.js process when the request fails
2:	How to set up a cron job that runs a Node.js app
3:	How to get both parsed body and raw body in Express
4:	Interact with the Google Analytics API using Node.js
5:	How to bulk convert file names using Node.js
6:	How to deep copy JavaScript objects using structuredClone
7:	How to handle file uploads in Node.js
8:	How to send an email using nodemailer
9:	Logging all the requests coming through an Express app
10:	How to upload an image to S3 using Node.js
11:	How to read a CSV file with Node.js
12:	How to set the current working directory of a Node.js program
13:	How to upload files to S3 from Node.js
14:	▶︎ How to write a CSV file with Node.js
15:	Where to host a Node.js app
16:	Parsing JSON with Node.js
17:	nodemailer, how to embed an image into an email
18:	The Pug Guide
19:	Restarting a Node process without file changes
20:	How to use Sequelize to interact with PostgreSQL