How to send a PDF file to a WhatsApp user in Node.js

Using the WhatsMate WhatsApp Gateway REST API

Posted on January 16, 2018   Share on Facebook Share on LinkedIn Share on Twitter Share on Google+

Last reviewed: April 17, 2024  

This article shows you how to send a document (e.g. a PDF file, an MP4 file, a WAV file, etc.) to a registered WhatsApp user in Node.js (JavaScript).

Before the recipient can receive your WhatsApp message, she MUST register with the WhatsMate WA Gateway. Instructions are available on the official site. Unregistered users will never receive messages from the Gateway.

To send a WhatsApp message containing a PDF file in Node.js, do this:

  1. First, learn how to send a simple text message on the official site.
  2. With the above knowledge, you can now download our sample code.
  3. Locate the file nodejs/send-pdf-individual.js.
  4. Study the Node.js source code and customize the TODO/FIXME lines.
    • Among other things, put down YOUR OWN number as the recipient. You can’t send messages to strangers because we are against SPAMMERS.
  5. Change to the directory containing the script: cd nodejs
  6. Run the script to send yourself the first image: ./send-pdf-individual.js

Happy coding :)