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</script></nav></div><div class="container mainContainer docsContainer"><div class="wrapper"><div class="post"><header class="postHeader"><h1 id="__docusaurus" class="postHeaderTitle">Online Playground</h1></header><article><div><span><p>The <strong>Diagrams Playground</strong> is a free online editor for the <strong>diagrams</strong> library. Write Diagram as Code in Python and see the rendered architecture diagram appear next to it — in your web browser, with nothing to install.</p>
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<blockquote>
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<p><strong><a href="/playground/">Open the Playground →</a></strong></p>
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</blockquote>
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<h2><a class="anchor" aria-hidden="true" id="why-use-it"></a><a href="#why-use-it" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Why use it</h2>
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<p>Installing <strong>diagrams</strong> locally means installing Python <em>and</em> <a href="https://www.graphviz.org/">Graphviz</a>. The playground skips both, which makes it handy when you want to:</p>
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<ul>
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<li>try <strong>diagrams</strong> before installing anything,</li>
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<li>sketch a cloud architecture diagram from a laptop that isn't set up for Python,</li>
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<li>share a working diagram with a teammate as a single link,</li>
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<li>look up which node classes exist for AWS, Azure, GCP, Kubernetes and the other providers.</li>
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</ul>
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<h2><a class="anchor" aria-hidden="true" id="what-it-can-do"></a><a href="#what-it-can-do" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>What it can do</h2>
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<ul>
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<li><strong>Live preview</strong> — the diagram re-renders as you type.</li>
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<li><strong>Node browser</strong> — search every available node, or browse the full provider → category tree, and click to insert the matching <code>import</code>.</li>
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<li><strong>Autocompletion</strong> — import paths and node names complete as you type, with signature hints for <code>Diagram</code>, <code>Cluster</code> and <code>Edge</code>.</li>
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<li><strong>Export</strong> — download the result as PNG, SVG or JPEG at a size you choose, or copy the image straight to your clipboard.</li>
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<li><strong>Share links</strong> — the whole diagram is encoded into the URL, so sending the link is enough. Nothing is stored on a server.</li>
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<li><strong>Examples</strong> — start from a ready-made diagram instead of a blank editor.</li>
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</ul>
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<h2><a class="anchor" aria-hidden="true" id="how-it-works"></a><a href="#how-it-works" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>How it works</h2>
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<p>The playground runs the real <strong>diagrams</strong> package — not a reimplementation — inside your browser using <a href="https://pyodide.org">Pyodide</a>, which is CPython compiled to WebAssembly. Graph layout is done by a WebAssembly build of Graphviz.</p>
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<p>Everything executes locally in the browser tab: your code is never uploaded, and there is no backend. The first visit downloads the Python runtime, so it takes a few seconds; after that it is cached.</p>
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<h2><a class="anchor" aria-hidden="true" id="when-to-install-instead"></a><a href="#when-to-install-instead" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>When to install instead</h2>
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<p>The playground is for quick work and sharing. Install the library (<a href="/docs/getting-started/installation">installation guide</a>) when you want to:</p>
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<ul>
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<li>keep diagrams in version control next to your code,</li>
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<li>generate diagrams in CI or a build script,</li>
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<li>use custom local icons, or</li>
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<li>work offline.</li>
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</ul>
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<p>The Python code is identical either way, so anything you write in the playground runs unchanged after <code>pip install diagrams</code>.</p>
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</span></div></article></div><div class="docLastUpdate"><em>Last updated on 9/10/2026</em></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/getting-started/installation"><span class="arrow-prev">← </span><span>Installation</span></a><a class="docs-next button" href="/docs/getting-started/examples"><span>Examples</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#why-use-it">Why use it</a></li><li><a href="#what-it-can-do">What it can do</a></li><li><a href="#how-it-works">How it works</a></li><li><a href="#when-to-install-instead">When to install instead</a></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/diagrams.ico" alt="Diagrams" width="66" height="58"/></a><div><h5>Docs</h5><a href="/docs/getting-started/installation">Getting Started</a><a href="/docs/guides/diagram">Guides</a><a href="/docs/nodes/aws">Nodes</a></div><div><h5>More</h5><iframe src="https://ghbtns.com/github-btn.html?user=mingrammer&repo=diagrams&type=star&count=true&size=large" frameBorder="0" scrolling="0" width="170" height="30" title="Star mingrammer/diagrams on GitHub"></iframe></div></section><section class="copyright">Copyright © 2026 mingrammer</section></footer></div></body></html> |
