How to build Telegram Mini App

What Are Telegram Mini Apps?

Telegram Mini Apps represent a powerful platform for developing web-based applications that integrate directly into the Telegram messenger. This guide provides a complete walkthrough for creating your own Mini App – from initial setup through deployment and monetization with AdsGram.

Telegram Mini Apps are web applications that run within the Telegram interface, providing users with interactive experiences without requiring app store downloads or external installations. Built using standard web technologies, they offer developers:

Cross-platform compatibility (iOS, Android, Desktop, Web)

Simplified distribution through bot links and menu buttons

Bot and Mini App Registration – Configuring your Telegram bot and Mini App entity through BotFather

Application Development – Building your web application using frameworks like React, Vue, or vanilla JavaScript

Deployment and Integration – Hosting your application and connecting it to Telegram’s ecosystem

This article provides step-by-step instructions for each phase, including development best practices, testing strategies, and monetization opportunities through AdsGram’s specialized advertising platform for Telegram Mini Apps.

Before starting development, it’s essential to establish a proper development environment. Following industry best practices means never developing Mini Apps directly in production. Instead, use Telegram’s Test Environment to ensure safe, efficient development without affecting real users or production systems.

Telegram provides a separate Test Environment specifically designed for development and testing. This isolated environment mirrors production functionality while offering key advantages: HTTP protocol support (eliminating SSL certificate requirements during local development), direct IP address access without domain names, and complete isolation from production bots and real user data.

Application Development Workflow

For Telegram Desktop, open Settings → Advanced, enable Experimental settings, select Use test server, and restart. On mobile (iOS/Android), navigate to Settings → Data and Storage, tap Use Test Backend 10 times, enable the toggle, and restart the app.

Note that test accounts are completely separate from production accounts. You’ll need to create a new test bot using BotFather in the test environment.

During active development, always use the Test Environment with HTTP and local servers for faster iteration. Before production deployment, set up HTTPS hosting with valid SSL certificates and test your application in the Test Environment first. Only deploy to Production when your application is fully tested, you have production-grade hosting, and all features (including AdsGram integration) are configured.

This separation ensures your development process is professional, safe, and efficient – allowing you to build confidently without risking production stability.

This stage determines how convenient and useful your application will be. Don’t worry, the process is quite simple, and even if you have no experience, you can figure it out. You’ll learn how to build effective mini-applications from scratch.

First of all, think about why you need a mini-application. It can be:

The game is designed to entertain users and increase engagement. A useful tool (for example, a calculator, translator, or task scheduler). A service for communication (for example, a bot to help clients or an automated FAQ).

It is important to understand what problem you want to solve with your mini-application. The clearer the goal, the easier it will be to develop its structure and functionality.

Now that you have decided on a goal, it’s time to choose what you will develop your application on. Here are some popular options:

JavaScript is an excellent choice if you know basic programming. You can use it to create a web app that runs smoothly in the Telegram ecosystem. Telegram provides excellent support for this technology, and it is quite convenient for a quick start. React. It is a library for creating user interfaces. It is great for developing mini-applications, as it simplifies the creation of components and user interaction. Other web technologies. You can also use HTML and CSS to create the interface of your application. These basic elements will help make your project visually appealing and functional.

Development Environment Setup

Don’t be afraid to experiment. If you have experience with other frameworks or libraries, try them out. The main thing is that they support integration with Telegram’s ecosystem and open network protocols.

To create a Telegram Mini App, you must first set up a Telegram bot through BotFather –Telegram’s official bot management tool. BotFather acts as the central administrator for all bots and Mini Apps on the platform.

Open Telegram and search for @BotFather . Start a conversation and use the /newbot command. BotFather will guide you through providing a display name and unique username (must end with “bot”, e.g., MyCoolMiniApp_bot).

Upon creation, BotFather provides an authentication token –store this securely in your environment variables, as it grants full control over your bot.

Use the /newapp command in BotFather to register a new Mini App and link it to your bot. Provide the app’s short name, description, and icon. Your Mini App receives a direct link: https://t.me/{bot_username}/{app_short_name}.

Telegram offers two distinct ways to make your Mini App accessible, each serving different purposes.

The Menu Button appears at the bottom-left of the chat interface when users interact with your bot. This method creates a seamless experience where your Mini App feels like a natural extension of bot functionality.

Setup: Send /setmenubutton to BotFather → Select your bot → Provide your web app URL (HTTPS required in production) → Enter button title.

Ideal for: Bot-integrated apps, personalized dashboards, customer support tools, apps requiring conversation context.

Direct Links create standalone Mini Apps accessible via shareable URLs without requiring bot interaction first. Perfect for independent applications that benefit from viral distribution.

Preparation for development

Setup: Send /myapps to BotFather → Select your Mini App → Click “Edit Web App URL” → Enter your URL (HTTPS required in production).

Ideal for: Standalone games, e-commerce stores, utility tools, viral applications, marketing-driven apps.

Choose Menu Button if your app complements bot commands or needs conversation context. Choose Direct Link if your app works independently and benefits from direct sharing. You can also implement both methods simultaneously—use Menu Button for bot users and Direct Link for new user acquisition and viral growth.

Regardless of method, ensure your URL uses HTTPS with valid SSL in production (HTTP only in Test Environment). Both configurations support AdsGram integration for monetization.

To develop your TMA, you can use different frameworks, such as React, or create an application from scratch using web technologies and Telegram’s services. Whether you’re building a simple bot or a complex interactive app, this step-by-step guide will help you through the process.

These are web applications that run directly within the Telegram interface, offering users smooth experiences without needing to visit the app store.

Remember, everything is not as difficult as it may seem at first glance.

First you need to create a telegram mini app project — this will be the base of your mini-application. Text editors or development environments (IDEs) such as VS Code, WebStorm, or even simple editors like Sublime Text will help you with this. They help organize the code and make writing it more convenient. You’ll need to set up a proper test environment to ensure everything works correctly.

Create a folder for your project and create files inside:

index.html — this is the file that will contain the HTML code of your web app. style.css is a file with styles (CSS) for the interface design. app.js — here will be your main code that will control the application logic and interaction with Telegram services.

Development of a mini-application

When the project structure is ready, you can move on to the code. Let’s look at how to set up your application and make it interactive. You’ll want to ensure your app work correctly with proper debug capabilities.

Use the token that you received from the manager and connect it in your code to set up interaction with Telegram. If you are using web technologies, connect the Telegraf library via SDK — it simplifies working with Telegram and makes it easy to send and receive messages through the bot api. This library will help your bot communicate effectively with users and handle authentication processes smoothly.

This code launches an application that will greet all users at startup. Then you can add more functions, such as processing text commands or button clicks. You can also integrate Web3 features and wallet functionality for advanced use cases. Your bot will be able to handle various user interactions effectively and send a message to users when needed.

If your mini app using interactive elements needs to work with users through the interface, you need to add the HTML code to the file index.html . For example, if you have a mini-game, create buttons and input fields with an intuitive UI. Make sure to design the header of the mini app to be clear and functional:

Now let’s move on to the app.js, where all the application logic will be located. For example, you can add button click processing and notification systems. You may also need backend support depending on your application’s complexity. Your bot should respond appropriately to different user commands and actions. Mini apps support seamless authorization, so users can log in easily.

The interface of your mini-application should be simple and intuitive so that users do not get lost and can quickly figure out how to use it within telegram. Consider implementing push notifications to keep users engaged even when they’re not actively using the app.

When everything is ready, you need to test your mini app to see how it works. There are several options here:

Start a local server using Live Server in VS Code or another tool. This will allow you to immediately see the changes and test the functionality. If you want to do everything for real and test the application in Telegram, deploy it on a platform like Heroku or Vercel. This will allow your application to work in real conditions and accept requests from users.

To run the application on the server, create a server file.js and use code like this:

That’s all! Your mini-application is ready for testing and launch. All that remains is to optimize it and add new features so that users get the most pleasure and benefit. And with AdsGram, you can immediately start an advertising campaign to attract more users and get a response to your application.

Debugging and Testing

After developing your Mini App, thorough debugging and testing are crucial before deployment. Telegram provides several tools and methods to help you identify and resolve issues during the development process.

Testing can be performed at different stages depending on your setup. For local development, run your application on a local server using tools like Live Server in VS Code. When using the Test Environment, you can access your application via HTTP links and IP addresses for straightforward testing. For production-like testing, deploy to staging platforms such as Vercel, Netlify, or Heroku to test how your Mini App behaves in real Telegram conditions.

Modern browsers provide powerful debugging capabilities accessible through developer tools. On Telegram Desktop, right-click inside your Mini App and select “Inspect Element” to access the Console, Network tab, and JavaScript debugger. For mobile debugging, use Chrome’s Remote Debugging (chrome://inspect) for Android or Safari’s Web Inspector for iOS devices.

Verify your bot token is correct and stored properly in environment variables

Ensure your hosting provides valid SSL certificates (production requirement)

Confirm webhook URL is accessible and sending proper responses

Test on iOS, Android, Desktop, and Web for consistent behavior

Before going live, verify that all core functionality works correctly, including user authentication, interactive elements, and API integrations. Ensure error handling provides appropriate user feedback and test across different screen sizes and devices. Monitor loading times and application responsiveness to guarantee smooth performance.

Once live, implement monitoring tools like Sentry or LogRocket to track errors and performance. Monitor API response times, track user behavior patterns, and set up alerts for critical issues. Regular monitoring helps you quickly identify and resolve problems, maintaining high-quality service for your users.

Understanding HTTPS requirements is critical for successful Mini App deployment. Telegram enforces strict security standards in production, and meeting these requirements prevents the most common deployment issues.

HTTPS Requirements and Deployment Considerations

Telegram requires HTTPS for all production Mini Apps to encrypt sensitive data –user information, authentication tokens, and API requests. Test Environment allows HTTP URLs and IP addresses (e.g., http://192.168.1.100:3000) for local development. Production Environment strictly requires HTTPS with valid SSL certificates – HTTP URLs will be rejected.

Most modern hosting platforms provide automatic SSL provisioning at no cost:

Vercel – Automatic SSL, instant HTTPS URLs, excellent for React/Next.js applications.

Netlify – Free SSL certificates, continuous deployment, ideal for static sites.

Heroku – Free SSL on all apps, supports multiple languages, great for full-stack applications.

AWS/DigitalOcean – Manual SSL configuration required, suitable for advanced developers needing custom infrastructure.

Let’s Encrypt offers free certificates for manual installation. Commercial providers (DigiCert, Sectigo) offer paid certificates typically unnecessary for most Mini Apps.

Verify installation and expiration using SSL checkers (SSL Labs)

Ensure all resources (images, scripts, APIs) use HTTPS URLs

Not accepted—use trusted authorities (Let’s Encrypt, DigiCert)

How do I add a mini-app to Telegram?

Certificate must match domain exactly; use wildcard for subdomains

Development Phase: Use HTTP with local servers in Test Environment for rapid iteration.

Pre-Production: Deploy to hosting with automatic HTTPS, verify SSL certificate, test with HTTPS in Test Environment, ensure all external resources use HTTPS.

Production: Update BotFather with HTTPS URL, test across platforms, monitor certificate expiration, enable automatic renewal.

Store credentials in environment variables, implement proper CORS headers, use HTTPS for all API communications, and keep SSL certificates current with automatic renewal. When using custom domains, ensure DNS points correctly to your hosting platform – SSL provisioning typically completes within 5-30 minutes.

HTTPS is a fundamental requirement for production Mini Apps. Choosing hosting platforms with automatic SSL provisioning ensures your Mini App meets Telegram’s security standards efficiently.

When your mini-application is ready and tested, it’s time to add it to Telegram so that users can use it. Understanding how telegram mini apps work is crucial for successful integration.

The first step is to place your mini—application on the server. This is necessary in order for it to be available to users at any time. The server allows your application to run continuously and process requests in real time. Here’s how to do it:

Choose a hosting platform. This can be a free hosting service, for example, Heroku or Vercel, or a paid service like AWS or DigitalOcean. Choose the one that supports your development technology (for example, if you use web technologies, select a server that supports Node.js ). Upload your project to the server. You can place the project in a repository on GitHub or another similar service, and then connect it to the chosen hosting platform. This will allow you to deploy the application automatically with each update.

After downloading, your server will provide an app URL where your mini-application will be available online.

Promotion of a mini-application with AdsGram

When the project is hosted on the server, the next step is to connect your app to telegram so that Telegram can send requests to your application and receive responses. To do this, you will need the token that you received from the manager when creating the application.

Use this token in your server settings to link it to Telegram. This will allow your application to interact with users via Telegram and forward all user requests to your server. Your bot will serve as the bridge between users and your application. It is important that the server supports a secure connection (HTTPS), as Telegram requires this to ensure security.