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<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Posecode: Describe Human Movement as Text, Animated in 3D</title>
<link rel="icon" type="image/png" sizes="192x192" href="/favicon-192.png" />
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png" />
<meta
name="description"
content="Posecode is an open-source text-to-motion language for LLMs. Describe single-person movement as validated, inspectable text and animate it as a 3D figure in your browser."
/>
<meta
name="keywords"
content="text to motion, LLM animation, kinematic motion protocol, 3D human movement, exercise animation, physiotherapy animation, pose language, AI motion generation, ChatGPT animation, Claude animation, open source motion language"
/>
<link rel="canonical" href="https://www.posecode.org/" />
<meta name="theme-color" content="#0a0d12" />
<meta property="og:title" content="Posecode: human movement, written as text" />
<meta
property="og:description"
content="A Mermaid-style language for kinematic motion. Capable LLMs can write it; the browser validates and renders an inspectable animated 3D figure."
/>
<meta property="og:type" content="website" />
<meta property="og:url" content="https://www.posecode.org/" />
<meta property="og:site_name" content="Posecode" />
<meta property="og:image" content="https://www.posecode.org/og.png" />
<meta property="og:image:width" content="1200" />
<meta property="og:image:height" content="630" />
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="Posecode: human movement, written as text" />
<meta
name="twitter:description"
content="A Mermaid-style language for kinematic motion. Capable LLMs can write it; the browser validates and renders an inspectable animated 3D figure."
/>
<meta name="twitter:image" content="https://www.posecode.org/og.png" />
<link rel="preconnect" href="https://fonts.googleapis.com" />
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
<!-- Load fonts without blocking render: fetch as a low-priority stylesheet
(media="print") then flip to "all" once loaded. display=swap paints
text in the fallback immediately, so first paint isn't font-gated. -->
<link
rel="preload"
as="style"
href="https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap"
/>
<link
href="https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap"
rel="stylesheet"
media="print"
onload="this.media='all'"
/>
<noscript>
<link
href="https://fonts.googleapis.com/css2?family=Hanken+Grotesk:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;700&display=swap"
rel="stylesheet"
/>
</noscript>
<link rel="stylesheet" href="./src/landing.css" />
<script type="application/ld+json">
{
"@context": "https://schema.org",
"@graph": [
{
"@type": "WebSite",
"@id": "https://www.posecode.org/#website",
"url": "https://www.posecode.org/",
"name": "Posecode",
"description": "An open-source text-to-motion language for LLMs. Describe human movement as text; render it as an animated 3D figure in the browser."
},
{
"@type": "SoftwareApplication",
"@id": "https://www.posecode.org/#app",
"name": "Posecode",
"url": "https://www.posecode.org/",
"applicationCategory": "DeveloperApplication",
"operatingSystem": "Any (web browser)",
"description": "Posecode is a small language capable LLMs can use to describe single-person movement. The browser validates a closed vocabulary, constrains joint targets to configured ranges, and renders an inspectable animated 3D figure.",
"offers": { "@type": "Offer", "price": "0", "priceCurrency": "USD" },
"license": "https://github.com/posecode-dev/posecode/blob/main/LICENSING.md",
"sameAs": ["https://github.com/posecode-dev/posecode"],
"keywords": "text to motion, LLM, kinematic motion, 3D animation, exercise, physiotherapy, open source"
},
{
"@type": "FAQPage",
"@id": "https://www.posecode.org/#faq",
"mainEntity": [
{
"@type": "Question",
"name": "What is Posecode?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Posecode is an open-source text-to-motion language. You describe single-person movement as phases, joint targets, timing, and contacts; the browser validates the document and renders it as an animated 3D figure."
}
},
{
"@type": "Question",
"name": "How do I generate an exercise animation with an LLM?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Copy the authoring guide into a capable chat model and ask for a representable movement such as a hip hinge or hamstring stretch. For a representable request, the model should return raw .posecode text. Paste it into the playground: valid documents animate, while parse errors, range clamps, and unresolved reach targets appear as diagnostics."
}
},
{
"@type": "Question",
"name": "Does Posecode guarantee a movement is safe?",
"acceptedAnswer": {
"@type": "Answer",
"text": "No. Posecode constrains authored and IK-generated joint targets to configured reference ranges and reports unresolved reach targets. A simplified rig cannot certify that a whole movement is safe, accurate, or appropriate for a person. It is not medical advice."
}
},
{
"@type": "Question",
"name": "Is Posecode free to use?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Yes. Posecode is open source. The specification and core tooling use Apache-2.0; the product-facing renderer, embed, MCP server, eval harness, and playground use AGPL-3.0. A separate commercial agreement is available for closed-source use of AGPL components."
}
}
]
}
]
}
</script>
</head>
<body>
<div class="bg-fx" aria-hidden="true"></div>
<header class="nav">
<a class="brand" href="/" aria-label="Posecode home">
<svg class="logo" aria-hidden="true" viewBox="0 0 100 100" width="19" height="19" fill="none"><g stroke="currentColor" stroke-width="8" stroke-linecap="round" stroke-linejoin="round"><path d="M50 34V55"/><path d="M50 35L34 26L23 15"/><path d="M50 35L66 26L77 15"/><path d="M50 54L36 72L28 88"/><path d="M50 54L64 72L72 88"/></g><circle cx="50" cy="20" r="10" fill="currentColor"/></svg>
<span class="wordmark">Posecode</span>
</a>
<nav class="nav-links" aria-label="Primary">
<a href="#how">How it works</a>
<a href="#examples">Movements</a>
<a href="#developers">Developers</a>
<a href="/for-products">For products</a>
<a href="https://github.com/posecode-dev/posecode" target="_blank" rel="noopener">GitHub</a>
</nav>
<a class="btn primary nav-cta" href="/play">Try it live →</a>
</header>
<main>
<section class="hero">
<div class="hero-copy reveal">
<p class="eyebrow">A motion language for LLMs</p>
<h1 class="headline">Give your LLM<br /><span class="hl">a body.</span></h1>
<p class="subhead">
Give your LLM the Posecode prompt. Posecode turns its response into structured, editable 3D human
motion in your browser.
</p>
<div class="hero-cta">
<a class="btn primary lg" href="/play">Open the playground →</a>
<button class="btn ghost lg" data-copy-prompt>
<span class="lbl">Copy prompt for your LLM</span>
</button>
</div>
<div class="hero-meta" aria-label="Project highlights">
<span>Open source</span>
<span>Runs on-device</span>
<span>Prompt included</span>
</div>
</div>
<div class="hero-stage reveal" aria-label="A prompt becoming a live 3D movement">
<div class="prompt-card">
<span class="prompt-label">After pasting the Posecode prompt</span>
<p>Then ask: “Write a controlled superhero landing.”</p>
</div>
<div class="studio">
<div class="studio-bar" aria-hidden="true">
<span class="studio-kicker">AI output</span>
<span class="studio-title">superhero-landing.posecode</span>
<span class="studio-live"><i></i>live 3D</span>
</div>
<canvas id="hero-canvas"></canvas>
<div class="studio-hud"><span id="hero-phase">Drop into the landing</span></div>
</div>
<pre class="code-chip" aria-hidden="true"><span class="code-label">LLM-WRITTEN</span>
<span class="t-kw">step</span> <span class="t-str">"Make three-point contact"</span> <span class="t-num">0.3s</span><span class="t-punct">:</span>
<span class="t-kw">ground-lock</span><span class="t-punct">:</span> <span class="t-atom">foot_right</span>
<span class="t-kw">reach</span><span class="t-punct">:</span> <span class="t-atom">knee_left floor</span>
<span class="t-kw">reach</span><span class="t-punct">:</span> <span class="t-atom">fist_left floor</span></pre>
</div>
</section>
<section class="proof" aria-label="Why Posecode">
<article class="proof-item reveal">
<span class="proof-n">01</span>
<div><strong>LLM-native</strong><p>Readable movement, not matrices.</p></div>
</article>
<article class="proof-item reveal">
<span class="proof-n">02</span>
<div><strong>Range-aware</strong><p>Targets stay within configured ranges.</p></div>
</article>
<article class="proof-item reveal">
<span class="proof-n">03</span>
<div><strong>Browser-native</strong><p>Live 3D, no server-side diffusion.</p></div>
</article>
</section>
<section id="how" class="how">
<header class="section-head reveal">
<p class="eyebrow">How it works</p>
<h2>One prompt. Three clear steps.</h2>
</header>
<ol class="how-steps">
<li class="reveal">
<span class="how-n">01</span>
<h3>Ask</h3>
<p>Describe a representable movement.</p>
</li>
<li class="reveal">
<span class="how-n">02</span>
<h3>Generate</h3>
<p>A capable LLM writes a tiny <code>.posecode</code> file.</p>
</li>
<li class="reveal">
<span class="how-n">03</span>
<h3>Move</h3>
<p>The browser validates, constrains, and animates it.</p>
</li>
</ol>
</section>
<section id="examples" class="examples">
<header class="section-head reveal">
<p class="eyebrow">Movement library</p>
<h2>Ask for almost any move.</h2>
<p class="section-sub">Explore launch-ready examples across fitness, rehab, dance, and more.</p>
</header>
<div id="examples-grid" class="examples-grid"></div>
</section>
<section id="developers" class="developers">
<header class="section-head reveal">
<p class="eyebrow">For developers</p>
<h2>Open all the way down.</h2>
<p class="section-sub">Use the Apache-2.0 open standard or build with the AGPL-3.0 product layer.</p>
</header>
<div class="dev-grid">
<a class="dev-card reveal" href="/play">
<span class="dev-kind">Build</span>
<h3>Playground <span>→</span></h3>
<p>Edit and preview movement live.</p>
</a>
<div class="dev-card reveal">
<span class="dev-kind">Connect</span>
<h3>MCP server</h3>
<p>Let agents validate movement.</p>
</div>
<a class="dev-card reveal" href="./spec.html">
<span class="dev-kind">Author</span>
<h3>Language spec <span>→</span></h3>
<p>A small, semantic grammar.</p>
</a>
<a class="dev-card reveal" href="https://github.com/posecode-dev/posecode" target="_blank" rel="noopener">
<span class="dev-kind">Extend</span>
<h3>Open-source packages <span>→</span></h3>
<p>Apache specification and core tools, AGPL product runtime.</p>
</a>
</div>
</section>
<section class="final-cta reveal">
<p class="eyebrow">Your turn</p>
<h2>What should a body do?</h2>
<p>Ask your LLM. Paste the result. Watch it move.</p>
<div class="hero-cta">
<a class="btn primary lg" href="/play">Start with the playground →</a>
<button class="btn ghost lg" data-copy-prompt>
<span class="lbl">Copy LLM prompt</span>
</button>
</div>
</section>
</main>
<footer class="footer">
<div class="footer-top">
<div class="footer-brand">
<svg class="logo" aria-hidden="true" viewBox="0 0 100 100" width="19" height="19" fill="none"><g stroke="currentColor" stroke-width="8" stroke-linecap="round" stroke-linejoin="round"><path d="M50 34V55"/><path d="M50 35L34 26L23 15"/><path d="M50 35L66 26L77 15"/><path d="M50 54L36 72L28 88"/><path d="M50 54L64 72L72 88"/></g><circle cx="50" cy="20" r="10" fill="currentColor"/></svg>
<span>Posecode</span>
<small>human movement, written as text</small>
</div>
<nav class="footer-links" aria-label="Footer">
<a href="./moves/">Movements</a>
<a href="./spec.html">Spec</a>
<a href="./llm-guide.html">LLM guide</a>
<a href="/for-products">For products</a>
<a href="mailto:hello@posecode.org?subject=Posecode%20Feedback">Feedback</a>
<a href="https://github.com/posecode-dev/posecode" target="_blank" rel="noopener">Source</a>
<a href="https://github.com/posecode-dev/posecode/blob/main/LICENSING.md" target="_blank" rel="noopener">Licensing</a>
</nav>
</div>
<p class="footer-note">
Open source under Apache-2.0 and AGPL-3.0 · Range-of-motion values are general literature data, not medical advice.
</p>
</footer>
<script type="module" src="./src/landing.ts"></script>
</body>
</html>