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title: mruby — About

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Project

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<h1 class="page-header__heading">About mruby</h1>

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mruby is the lightweight implementation of the Ruby language complying to (part of)

the ISO standard. It can be linked and embedded within your application. We provide the interpreter

<span class="inline-code">mruby</span>, the interactive shell <span class="inline-code">mirb</span>,

and the compiler <span class="inline-code">mrbc</span>

which can also generate bytecode as a C source file.

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<h2 class="about-feature__title">Lightweight</h2>

<p class="about-feature__desc">Designed for constrained environments — microcontrollers, embedded systems, and any place where MRI Ruby is too heavy.</p>

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<h2 class="about-feature__title">Embeddable</h2>

<p class="about-feature__desc">Link <span class="inline-code">libmruby</span> directly into your C or C++ application and call mruby from native code.</p>

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<h2 class="about-feature__title">ISO-compliant</h2>

<p class="about-feature__desc">Conforms to a subset of the ISO/IEC 30170 Ruby specification, ensuring predictable, standards-based behaviour.</p>

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<h2 class="about-feature__title">Bytecode</h2>

<p class="about-feature__desc">Compile Ruby to <span class="inline-code">.mrb</span> bytecode or embed it as a C array — ship programs without distributing source.</p>

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<p class="about-section-eyebrow">Release History</p>

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{% assign release_posts = site.posts | where_exp: "post", "post.url contains '-released'" %}

{% for post in release_posts %}

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<span class="about-release-row__date">{{ post.date | date: "%d %b %Y" }}</span>

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{% if forloop.first %}<span class="about-release-badge">Latest</span>{% endif %}

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{% endfor %}

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<p class="about-section-eyebrow">Talks &amp; Videos</p>

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<iframe src="https://www.youtube-nocookie.com/embed/ZXbs9yuzv-E" title="mruby 3.0" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

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<p class="about-video-title">mruby 3.0</p>

<p class="about-video-subtitle">福岡県未来ITイニシアティブ</p>

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<iframe src="https://www.youtube-nocookie.com/embed/Xa08hqK7ozs" title="An Introduction to mRuby" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

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<p class="about-video-title">An Introduction to mRuby</p>

<p class="about-video-subtitle">Yukihiro &ldquo;Matz&rdquo; Matsumoto &middot; DraperTV</p>

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<p class="about-section-eyebrow">Acknowledgement</p>

<p class="about-ack__text">Sponsored by the Regional Innovation Creation R&amp;D Programs of the Ministry of Economy, Trade and Industry of Japan.</p>

<p class="about-ack__logo">mruby logo by <a href="https://github.com/h2so5">h2so5</a></p>

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