Serilab Open app
Serial dashboard · Web Serial

Build the panel before you build the hardware.

Serilab is a free tool for prototyping and testing audio & synth microcontrollers: Daisy Seed, Teensy, Axoloti, Raspberry Pi, anything that speaks serial. Connect over USB, drop in knobs, faders and LEDs, and drive your firmware live. No install, no account.

Open App
serilab.site
The Serilab app: a control surface with knobs, faders and LEDs.
Web Serial. Connects to your device straight from the browser.
No backend. No install, no server, no driver.
Drag & drop. Build your UI from knobs, faders and LEDs.
Free & open. No account, no subscription.
Works with any serial-capable board

Daisy Seed · Teensy · Axoloti · Raspberry Pi · STM32 · … if it can print a line over serial, Serilab can drive it.

Daisy Seedturnkey HAL Teensy Axoloti Raspberry Pi STM32 …
Print a line — the widget moves

No SDK, no binary protocol. Emit plain text over serial and Serilab maps it to your controls. That's the whole integration.

device → Serilab
hw.PrintLine("cutoff:%d", value);   // → the Cutoff knob moves
Serilab → device
// you receive the same format back when you move a widget
"cutoff:92\n"   // split on the first ':' — done
Full protocol in the FAQ. It fits in a paragraph.
Eight widgets. Drag them in.

Inputs you drive, outputs your board drives back.

Button trigger
Fader send / receive
Knob send / receive
Encoder delta
Radio toggle
LED status
LCD text
Scope signal

Serilab is free.

No subscription, no account. The tool is free to use and runs entirely in the browser. If Serilab is useful to you, I'd love a coffee.

Support on Ko-fi <3

Just open it and get going.

No download, no account, no server. Plug in your controller, open Serilab and start building.

Open App