Send PDF Files to Telegram Groups in Node.js - Complete Guide

Automate Telegram Group Document Sharing with Node.js

Need to integrate Telegram group PDF sharing into your Node.js applications for real-time notifications, automated reporting, or web services? This guide shows you how to deliver PDF files to Telegram groups using Node.js and the WhatsMate Telegram Gateway REST API. Perfect for Node.js developers building web applications, backend services, or automation tools that need document delivery to group chats.

📋 Prerequisites

Before you begin, ensure you have:

1. A WhatsMate Telegram Gateway account - Required for API access
2. Group membership - The gateway must be a member of the target Telegram group
3. Node.js installed - Version 8 or later recommended
4. PDF file ready - Have the document you want to send available locally
5. Basic JavaScript knowledge - Familiarity with Node.js and file system operations

⚠️ Important: The gateway must be a member of the Telegram group you want to send messages to. The group admin phone number is used to uniquely identify the group.

📄 File System Access: The script uses fs.readFileSync to read PDF files, so ensure your Node.js process has appropriate file permissions.

🎥 Video Walkthrough

📝 Step-by-Step Implementation

Follow these steps to send your first PDF document to a Telegram group from a Node.js application:

1. Copy the Node.js Source Code

Start by copying the following source code into your JavaScript file:

2. Configure a few Parameters

Customize these key parameters in the Node.js code:

• Line 7: Replace "YOUR_OWN_GATEWAY_INSTANCE_ID" with your Telegram gateway instance ID
• Line 8: Replace "YOUR_OWN_CLIENT_ID" with your Client ID
• Line 9: Replace "YOUR_OWN_SECRET_ID" with your Client Secret
• Line 12: Replace "Muscle Men Club" with the name of your target Telegram group
• Line 13: Replace "19159876123" with the phone number of the group admin (including country code)
• Line 14: Replace "../assets/subwaymap.pdf" with the path to your PDF file
• Line 15: Replace "anyname.pdf" with the desired filename for the document
• Line 16: Replace "Check this out" with an optional caption for your PDF

3. Make the Script Executable

Set execute permissions on your script:

chmod 755 group-send-telegram-pdf.js

4. Run Your Node.js Script

Execute the script to deliver your PDF to the Telegram group:

./group-send-telegram-pdf.js

Alternative: If the script isn’t executable, run it with Node.js directly:

node group-send-telegram-pdf.js

🔧 Common Use Cases

This Node.js integration is ideal for:

• Web application integration - Add Telegram group PDF sharing to Node.js web apps and APIs
• Real-time document delivery - Send reports, invoices, or documents from Node.js services to team groups
• Automated reporting tools - Generate and deliver PDF reports to Telegram groups on schedule
• Node.js microservices - Integrate with microservice architectures for document communication
• Server-side automation - Automate PDF delivery as part of Node.js batch processing or cron jobs

🚀 Get Started Today

Ready to integrate Telegram group PDF sharing into your Node.js applications? You’ll need a trial account to access the API. Sign up for a 2-week trial and start sending PDF documents to groups from your Node.js code within minutes!

Next Steps: Once you’ve mastered group PDF sending, explore advanced features like sending images to groups, audio files to groups, or individual messages through the WhatsMate Telegram Gateway API documentation.