Send PDF Files over Telegram in Java - Complete Guide

Automate Telegram document sharing using the WhatsMate Telegram Gateway REST API

Posted on June 20, 2022   Share on Facebook Share on LinkedIn Share on Twitter Share on Google+

Last reviewed: February 4, 2026  

Automate Telegram Document Sharing with Java

Looking to automate PDF delivery, document notifications, or file sharing from your Java applications? This guide walks you through sending PDF files to Telegram users using Java and the WhatsMate Telegram Gateway REST API. Perfect for Java developers, system administrators, and automation enthusiasts who want to integrate document delivery into their Java-based workflows.

📋 Prerequisites

Before you begin, ensure you have:

  1. A WhatsMate Telegram Gateway account - Required for API access
  2. Recipient registration - Each recipient must register with the Gateway first
  3. Java development environment - JDK installed and configured
  4. Basic Java knowledge - Familiarity with Java programming
  5. PDF file ready - Have the document you want to send available locally
  6. Required libraries - Gson and Commons Codec (details in code comments)

⚠️ Important: Recipients must register with the WhatsMate Telegram Gateway before they can receive messages. Unregistered users will not receive any messages from the Gateway. Registration instructions are available on the official WhatsMate site.

🎥 Video Walkthrough

📝 Step-by-Step Implementation

Follow these steps to send your first PDF document to a Telegram user from a Java application:

1. Copy the Java Code Template

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

2. Configure a few Parameters

Customize these key parameters in the Java code:

  • Line 50: Replace YOUR_INSTANCE_ID_HERE with your Telegram gateway instance ID
  • Lines 51-52: Update YOUR_CLIENT_ID_HERE and YOUR_CLIENT_SECRET_HERE with your Client ID and Secret
  • Line 61: Replace 1234556899 with the target phone number (including the country code)
  • Line 63: Replace ../assets/subwaymap.pdf with the path to your PDF file
  • Line 65: Replace anyname.pdf with the desired filename for the document
  • Line 66: Replace Check this out with an optional caption for your PDF

3. Compile the Java Program

Compile the Java source code (follow instructions at top of source file):

javac -cp "jars/gson-2.8.0.jar:jars/commons-codec-1.10.jar" TelegramPdfSender.java

4. Send Your PDF Document

Run the compiled Java program to deliver your PDF to Telegram:

java -cp ".:jars/gson-2.8.0.jar:jars/commons-codec-1.10.jar" TelegramPdfSender

🔧 Common Use Cases

This automation approach is ideal for:

  • Automated report delivery - Send daily/weekly PDF reports to Telegram from Java applications
  • Document sharing automation - Deliver invoices, receipts, or contracts via Telegram using Java
  • System documentation - Share configuration files or logs as PDF documents from Java systems
  • Educational content - Distribute learning materials or tutorials through Telegram from Java
  • Integration with Java document generation - Combine with Java libraries that create PDFs for Telegram delivery

🚀 Get Started Today

Ready to automate your document sharing over Telegram with Java? You’ll need a trial account to access the API. Sign up for a 2-week trial and start sending PDF files within minutes!

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