Telegram is not only a messaging app — it’s a powerful development platform. With the introduction of Telegram Mini Apps, developers are now able to create interactive, web-based experiences directly inside Telegram chats. Whether you're developing a shopping cart, booking system, financial dashboard, or even a game, Mini Apps provide a seamless and intuitive strategy to reach users where they already are.
This guide explains how to construct a create telegram mini app, from setup to deployment.
🔹 What Is a Telegram Mini App?
A Telegram Mini App is a web app (built using HTML, CSS, and JavaScript) that launches inside Telegram via a bot. It runs within Telegram’s interface, offering rich UI, smooth interactions, and optional payment support — all without requiring users to go out of the app or install anything.
🔹 What Can You Build?
You will use Mini Apps to create:
🛒 E-commerce stores
🗓️ Booking and scheduling apps
📊 Dashboards and calculators
🎮 Mini games
📋 Surveys and forms
🧾 Bill payment tools
✅ Step-by-Step: How to Build a Telegram Mini App
Step 1: Set Up Your Bot
Open Telegram and check for @BotFather
Use the command /start
Create a brand new bot with /newbot
Give it a title and a username (must result in bot)
Copy your API token — you’ll need it for backend interaction
Step 2: Build Your Web App
Telegram Mini Apps are regular web apps that really must be:
Responsive and mobile-first
Hosted with Hyper Text Transfer Protocol Secure
Written in HTML, CSS, JavaScript
Integrated with Telegram’s Web App API
Here’s a fairly easy example:
html
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Hello from Telegram Mini App!
Get Telegram Info
<br/> function showUser() <br/> const user = Telegram.WebApp.initDataUnsafe.user;<br/> document.getElementById('user').textContent = <br/> `Hello, $user.first_name ($user.username)`;<br/> <br/><br/> Telegram.WebApp.ready(); // Notify Telegram app<br/>
Step 3: Host Your Mini App
Use any Hyper Text Transfer Protocol Secure-supported host like Vercel, Netlify, Firebase, or perhaps your own server
Your app have to be served over Hyper Text Transfer Protocol Secure to function inside Telegram
Step 4: Connect Your Mini App towards the Bot
Go back to @BotFather
Choose your bot → /setdomain
Set the base domain of one's Mini App (e.g., myapp.example.com)
Then set the Web App URL using /setmenubutton or /setcommands
Example bot command:
bash
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/setcommands
start - Launch the mini app
Inside your bot’s backend, you can use the reply_markup parameter to add a Web App button on the message.
Example using Python (with python-telegram-bot):
python
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from telegram import InlineKeyboardButton, InlineKeyboardMarkup, WebAppInfo
keyboard = [
[InlineKeyboardButton("Open App", web_app=WebAppInfo(url="myapp.example.com"))]
]
reply_markup = InlineKeyboardMarkup(keyboard)
bot.send_message(chat_id=chat_id, text="Click to open up app", reply_markup=reply_markup)
Step 5: Optional – Add Payment Integration
Use Telegram’s Payments API if you need to:
Sell products
Accept donations
Enable checkout flows
Telegram supports providers like Stripe, Payme, and YooMoney. You must first register a provider with @BotFather using /setpayment.
🔐 Security Tips
Always validate Telegram’s user identity on the backend using the initData parameter
Use the initDataUnsafe simply for non-sensitive actions
Never trust client-side data without verification
Telegram provides init data validation instructions here
✅ Final Notes
Telegram Mini Apps are an exciting approach to build modern, interactive services inside the Telegram ecosystem. They require no installation, no app store approval, and enable instant access to your massive global audience.
🧠 Resources
Telegram Web Apps API: core.telegram.org/bots/webapps
Telegram Bot API: core.telegram.org/bots/api
Example Projects: GitHub seek out “Telegram Mini App” or “Telegram Web App”
Building a Telegram Mini App is not difficult, flexible, and powerful. By combining the reach of Telegram bots with custom web interfaces, developers can produce everything from simple tools to full-fledged platforms — all within one chat window.