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How to Build a Telegram Mini App – Full Guide 2025

16/05/2025

How to Create a Mini App in Telegram: A Complete Beginner's Guide

By Charlotte Hayes

Telegram Mini Apps offer a new way to build web-based applications that run directly inside the Telegram messenger interface. These apps look and feel like native experiences but are built using standard web technologies — HTML, CSS, and JavaScript.

From booking services to games to crypto dashboards, Mini Apps allow developers to create lightweight, accessible tools without requiring users to download anything extra. This guide will show you how to build and deploy your own Telegram Mini App step by step.

What Is a Telegram Mini App?

Telegram Mini Apps are interactive web applications launched inside Telegram chats or bots. Unlike traditional Telegram bots that rely purely on command responses, Mini Apps support rich interfaces like buttons, input fields, and live data updates — all within the Telegram platform.

They are ideal for:

  • Service bookings

  • Payment forms

  • Crypto wallets or dashboards

  • Games or quizzes

  • E-commerce previews

  • Event ticketing

Step 1: Set Up a Telegram Bot

Every Mini App starts with a Telegram Bot. This bot serves as the entry point that users interact with.

  1. Open Telegram and search for @BotFather

  2. Type /newbot and follow the instructions

  3. Choose a name and username for your bot

  4. Copy the bot token provided at the end — you'll need it for your backend integration

This bot will later launch your Mini App when the user taps a button or visits a link.

Step 2: Build the Web App Interface

Your Mini App is a web application hosted on your server. You can build it using any frontend stack, but Telegram expects the following:

  • HTML/CSS/JavaScript or any framework like React, Vue, or Svelte

  • Responsive design to fit mobile and desktop viewports

  • Telegram Web App SDK for context access (e.g., user data, theme)

Official documentation: Telegram Web Apps SDK

The SDK gives you access to Telegram-provided methods like:

  • Telegram.WebApp.initData

  • Telegram.WebApp.MainButton

  • User authentication and theming

You'll include the SDK via:

htmlCopyEdit<script src="https://telegram.org/js/telegram-web-app.js"></script>

Step 3: Host the Mini App

Your web app must be publicly accessible via HTTPS.

You can host it using:

  • Vercel – Free for small projects, easy Git integration

  • Netlify – Good for static or frontend apps

  • Render – Ideal for dynamic apps with a backend

  • Your own VPS or cloud server (AWS, DigitalOcean, etc.)

Make sure your SSL certificate is active. Telegram won't load non-secure endpoints.

Step 4: Link the Web App to Your Bot

You can launch your Mini App using custom keyboard buttons or inline buttons within messages.

Example using Python + python-telegram-bot:

pythonCopyEditfrom telegram import InlineKeyboardButton, InlineKeyboardMarkup keyboard = [[InlineKeyboardButton("Open App", web_app=WebAppInfo(url="https://your-app-url.com"))]] reply_markup = InlineKeyboardMarkup(keyboard) bot.send_message(chat_id=chat_id, text="Try the app:", reply_markup=reply_markup)

This button will launch your hosted app directly within Telegram.

Step 5: (Optional) Add Telegram Login and Payments

You can integrate additional Telegram features like:

  • Telegram Login Widget – Authenticate users with their Telegram ID

  • Telegram Payments – Accept in-app purchases via payment providers like Stripe or Payme

These add credibility and convenience to your Mini App experience.

Step 6: Test and Submit

Once your Mini App is working and integrated with the bot:

  • Test it on both mobile and desktop Telegram clients

  • Ensure buttons, user data access, and responsiveness all function correctly

  • Monitor your server performance and uptime

There is no formal submission to Telegram required unless you're requesting official promotion or integration with Telegram Ads.

Final Thoughts

Telegram Mini Apps offer a fast, accessible, and user-friendly way to launch applications inside one of the world's most active messaging platforms. They're ideal for teams that want to validate ideas quickly, deliver tools with low friction, or build mini-services for a global user base.

With only a Telegram bot and a secure web app, you can have a functional Mini App running in hours.

If you need help designing your Telegram Mini App or building growth around it, we at LinkProfit.ie offer consulting and development support tailored for Web3, fintech, and startup products.

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