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<h1 id="dev_page_title">TDLib Build Your Own Telegram</h1>
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<p>Telegram offers developers more than just the <a href="https://core.telegram.org/bots">Bot API</a>. Since day one, we&#39;ve also had a <strong>free</strong> and <strong>open</strong> <a href="https://core.telegram.org/api"><strong>Telegram API</strong></a> that allows anyone to create <strong>their own messaging apps</strong> operating in the Telegram cloud. These apps openly compete with the official ones and some of them have now reached more than <strong>10 million</strong> downloads on Google Play.</p>
<p>Users of these alternative clients can communicate with anyone on Telegram, but the apps often offer experimental, highly specialized or locally flavored features. Today we are introducing <strong>a new tool</strong> for third-party developers that will make it even easier to build <strong>fast</strong>, <strong>secure</strong> and <strong>feature-rich</strong> Telegram apps on our platform.</p>
<h3><a class="anchor" name="introducing-tdlib" href="#introducing-tdlib"><i class="anchor-icon"></i></a>Introducing TDLib</h3>
<p>Meet TDLib the <a href="https://core.telegram.org/tdlib"><strong>Telegram Database Library</strong></a>. TDLib takes care of all <strong>network implementation</strong> details, <strong>encryption</strong> and <strong>local data storage</strong>, so that developers can dedicate more time to design, responsive interfaces and beautiful animations.</p>
<h5><a class="anchor" name="universally-useful" href="#universally-useful"><i class="anchor-icon"></i></a>Universally useful</h5>
<p>TDLib supports all Telegram features and makes developing Telegram apps a breeze on <strong>any platform</strong>. It can be used on Android, iOS, Windows, macOS, Linux and virtually any other system. The library is compatible with <strong>any programming language</strong> that can execute C functions; it also has native bindings to Java and C#.</p>
<h5><a class="anchor" name="open-and-well-documented" href="#open-and-well-documented"><i class="anchor-icon"></i></a>Open and well-documented</h5>
<p>All TDLib API methods and public interfaces are <a href="https://core.telegram.org/tdlib/docs/"><strong>fully documented</strong></a>. The code is, of course, completely open and available on <a href="https://github.com/tdlib/td"><strong>GitHub</strong></a>.</p>
<h5><a class="anchor" name="secure-and-reliable" href="#secure-and-reliable"><i class="anchor-icon"></i></a>Secure and reliable</h5>
<p>TDLib will remain <strong>stable</strong> on slow and unreliable Internet connections and guarantees that all updates will be delivered in the correct order. All <strong>local data is encrypted</strong> using a user-provided encryption key.</p>
<h5><a class="anchor" name="optimized-for-performance" href="#optimized-for-performance"><i class="anchor-icon"></i></a>Optimized for performance</h5>
<p>The library is fully asynchronous and optimized for high performance. We use TDLib in the Telegram Bot API, where <strong>each</strong> TDLib instance handles more than <strong>18,000</strong> active bots simultaneously.</p>
<h5><a class="anchor" name="battle-tested" href="#battle-tested"><i class="anchor-icon"></i></a>Battle-tested</h5>
<p>Our new <a href="/blog/telegram-x"><strong>Android X</strong></a> client is an example of what can be done with TDLib. Using TDLib, it took the developer of the app approximately one year to reproduce <strong>all</strong> the major features of Telegram for Android and add plenty of his own.</p>
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<p>Let&#39;s see what else TDLib will help bring to the Telegram ecosystem this year.</p>
<p><em>January 31, 2018,<br>The Telegram Team</em></p>
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<p>P.S. Today, we&#39;re also introducing Telegram X for Android, a new official app.<br><a href="/blog/telegram-x">Check out the announcement here »</a></p>
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<h4 class="dev_blog_card_title">Video Stickers, Better Reactions and More</h4>
<div class="dev_blog_card_lead">This update brings easy-to-make video stickers, better reactions with more compact animations and extra emoji, a button to review unseen…</div>
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<div class="dev_blog_card_date">Jan 31, 2022</div>
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<h4 class="dev_blog_card_title">Reactions, Spoilers, Translation and QR Codes</h4>
<div class="dev_blog_card_lead">Telegram&#39;s 12th update of the year introduces reactions, message translation, themed QR codes, hidden text (spoilers), and more.</div>
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<div class="dev_blog_card_date">Dec 30, 2021</div>
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<h4 class="dev_blog_card_title">Hyper-Speed Scrolling and Calendar View for Shared Media, Join Requests, Global Chat Themes on iOS and More</h4>
<div class="dev_blog_card_lead">Today&#39;s update brings new ways to find memories in shared media with accelerated scrolling…</div>
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