How to Build a Telegram Mini App: A Step-by-Step Guide for Developers
How to Build a Telegram Mini App: A Step-by-Step Guide for Developers
Blog Article
Telegram is not only just a messaging app — it’s a strong 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 give you a seamless and intuitive approach to reach users where they already are.
This guide explains developing a create telegram mini app, from setup to deployment.
???? What Is a Telegram Mini App?
A Telegram Mini App is often a web app (built using HTML, CSS, and JavaScript) that launches inside Telegram by having 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 make:
???? 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 look for @BotFather
Use the command /start
Create a whole new bot with /newbot
Give it a title and a username (must lead to bot)
Copy your API token — you’ll want it for backend interaction
Step 2: Build Your Web App
Telegram Mini Apps are regular web apps that needs to 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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copyright src="telegram.org/js/telegram-web-app.js">
Hello from Telegram Mini App!
copyright>
function showUser()
const user = Telegram.WebApp.initDataUnsafe.user;
document.getElementById('user').textContent =
`Hello, $user.first_name ($user.username)`;
Telegram.WebApp.ready(); // Notify Telegram app
Step 3: Host Your Mini App
Use any Hyper Text Transfer Protocol Secure-supported host like Vercel, Netlify, Firebase, or maybe your own server
Your app has to be served over Hyper Text Transfer Protocol Secure to be effective inside Telegram
Step 4: Connect Your Mini App for the Bot
Go to @BotFather
Choose your bot → /setdomain
Set the base domain of your 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 provide 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 in order 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 your own backend while using initData parameter
Use the initDataUnsafe only 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 way to build modern, interactive services inside Telegram ecosystem. They require no installation, no app store approval, and enable instant access with a massive global audience.
???? Resources
Telegram Web Apps API: core.telegram.org/bots/webapps
Telegram Bot API: core.telegram.org/bots/api
Example Projects: GitHub look for “Telegram Mini App” or “Telegram Web App”
Building a Telegram Mini App is easy, flexible, and powerful. By combining the reach of Telegram bots with custom web interfaces, developers can cause everything from simple tools to full-fledged platforms — all within one chat window.
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