<metaname="description"content="Velxio is a free, open-source Arduino emulator that runs entirely in your browser. Real AVR8 emulation at 16 MHz, 48+ electronic components, Monaco Editor, Serial Monitor, and Library Manager — no cloud, no latency."/>
<metaproperty="og:title"content="Velxio — Free Local Arduino Emulator"/>
<metaproperty="og:description"content="Write, compile, and simulate Arduino sketches entirely in your browser. Real AVR8 CPU at 16 MHz, 48+ electronic components, Serial Monitor, and Library Manager. Free & open source."/>
<metaname="twitter:title"content="Velxio — Free Local Arduino Emulator"/>
<metaname="twitter:description"content="Write, compile, and simulate Arduino sketches entirely in your browser. Real AVR8 CPU at 16 MHz, 48+ components, Serial Monitor, Library Manager. Free & open source."/>
"description": "Free, open-source Arduino emulator running entirely in the browser. Features real ATmega328p (AVR8) emulation at 16 MHz, RP2040 emulation, 48+ interactive electronic components, Monaco Editor, Serial Monitor with baud-rate detection, arduino-cli compilation backend, and Library Manager.",
"description": "Velxio is a free, open-source Arduino emulator. Real AVR8 CPU emulation, 48+ components, Monaco Editor, Serial Monitor — no cloud, no latency.",
"text": "Yes, Velxio is completely free and open source under the MIT License."
}
},
{
"@type": "Question",
"name": "Does Velxio work offline?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Velxio can be self-hosted via Docker. Once running, the simulation engine works fully offline in the browser. Compilation requires the local arduino-cli backend."
}
},
{
"@type": "Question",
"name": "What boards does Velxio support?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Velxio supports Arduino Uno (ATmega328p) with full AVR8 emulation and Raspberry Pi Pico (RP2040) emulation. More boards are planned."
}
},
{
"@type": "Question",
"name": "Is Velxio a Wokwi alternative?",
"acceptedAnswer": {
"@type": "Answer",
"text": "Yes. Velxio is a free, self-hosted alternative to Wokwi. It uses the same avr8js and wokwi-elements open-source libraries but runs entirely on your machine with no cloud dependency."
<h2>The free, open-source Arduino emulator that runs in your browser</h2>
<p>Write Arduino code, compile it, and simulate it with real AVR8 CPU emulation and 48+ interactive electronic components — all running locally in your browser. No cloud, no latency, no account required.</p>
<h3>Features</h3>
<ul>
<li>Real ATmega328p (AVR8) emulation at 16 MHz via avr8js</li>
<li>Raspberry Pi Pico (RP2040) emulation via rp2040js</li>
<li>Monaco Code Editor with full C++ / Arduino syntax highlighting</li>
<li>arduino-cli compilation backend — produces real .hex / .uf2 files</li>
<li>Serial Monitor with auto baud-rate detection and send</li>
<li>Library Manager for Arduino libraries</li>
<li>Multi-file workspace (.ino, .h, .cpp)</li>
<li>Wire system with orthogonal routing</li>
<li>ILI9341 TFT display simulation</li>
<li>I2C, SPI, USART, ADC, PWM support</li>
<li>Docker standalone image — deploy anywhere with one command</li>
</ul>
<h3>Supported Boards</h3>
<ul>
<li>Arduino Uno (ATmega328p) — full AVR8 emulation</li>
<li>Raspberry Pi Pico (RP2040) — RP2040 emulation</li>
</ul>
<h3>Get Started</h3>
<p>
<ahref="/editor">Open the Editor</a>— no installation needed.<br/>
Self-host with Docker: <code>docker run -d -p 3080:80 ghcr.io/davidmonterocrespo24/velxio:master</code>
</p>
<h3>Frequently Asked Questions</h3>
<dl>
<dt>Is Velxio free?</dt>
<dd>Yes. Velxio is free and open-source under the GNU AGPLv3 license. A commercial license is available for proprietary integrations.</dd>
<dt>Does Velxio work offline?</dt>
<dd>The simulation engine runs entirely in the browser. Compilation requires the local arduino-cli backend. Self-hosted deployments work fully offline once running.</dd>
<dt>Is Velxio a Wokwi alternative?</dt>
<dd>Yes. Velxio is a free, self-hosted alternative to Wokwi. It uses the same avr8js and wokwi-elements open-source libraries but runs on your own machine.</dd>
<dt>What boards are supported?</dt>
<dd>Arduino Uno (ATmega328p / AVR8) and Raspberry Pi Pico (RP2040). More boards are planned.</dd>
