RoboEyes 3D Simulator

RoboEyes 3D Simulator — Design Animated OLED Robot Eyes in Your Browser

RoboEyes is a free, privacy-first online simulator for designing animated OLED robot eyes — the same look made popular by the open-source FluxGarage RoboEyes library used on Arduino, ESP32, ESP8266 and Raspberry Pi projects. You can preview moods, blinks, idle motion, mouse tracking, breathing, sweat, flicker, mic-reactive dilation and 3D retina parallax in real time, all without installing anything or uploading a single file. Everything runs locally in your browser.

What you can do with this tool

• Tune every parameter — eye width, height, corner radius, spacing, pupil size, highlight, breathing speed and frame-rate — and see changes instantly on a 256×128 OLED-style canvas.
• Switch moods — default, happy, tired, angry, surprised, suspicious — with no leftover border lines or visual artefacts.
• Pick eye shapes — rounded rectangle, square, pixel, heart and star — useful for prototyping mascots and character displays.
• Mic-reactive mode — pupils dilate and the eyes bob gently with ambient sound, perfect for live demos and stream overlays.
• Share by URL — your full configuration is encoded into the link, so collaborators open the exact same look you designed.
• Fullscreen OLED preview — distraction-free output for screen-recording, kiosks or showing a build to your team.

Who is it for?

Makers prototyping a small SSD1306 / SH1106 OLED face for a desktop robot, students learning embedded animation, indie game devs sketching character expressions, and content creators who want a friendly animated avatar — without writing a line of code. Designers can lock in colours and proportions here, then port the values straight into the official RoboEyes Arduino sketch.

Why it loads fast and respects your privacy

There is no server-side rendering, no account, no tracking of your design data. The simulator is a single page of vanilla JavaScript that draws to a HTML5 canvas. Microphone audio, when you enable it, is processed locally with the Web Audio API — nothing is recorded or transmitted. That makes RoboEyes safe to use on a school network, a maker-space laptop or a streamer's main PC.

Tips for the best result

• Start from the Default mood, then tune width and spacing first — those have the biggest visual impact.
• Push border radius to its maximum to get fully circular pupils for cute mascot characters.
• Combine Idle + Auto-blink + Breathe for a believable "alive" feel during long idle sequences.
• For livestreams, enable Mic React and place the browser window as a transparent OBS source.

Frequently asked questions