Explore classic pedal circuits, swap components, and instantly hear how the sound changes. No breadboard required.
Choose from circuits inspired by classic pedals — overdrives, fuzzes, distortions, and more.
Swap diodes, adjust resistors, change capacitors. See the circuit update in real time.
Play a guitar sample through your modified circuit. A/B compare with the stock sound.
SPICE simulators are powerful — but they're built for electrical engineers, not pedal builders. PedalLab is built for you.
| Feature | PedalLab | LTspice | Multisim | LiveSPICE |
|---|---|---|---|---|
| Hear actual audio output | Yes | No | No | Yes |
| No install required | Yes | No | No | No |
| Guitar pedal circuits built-in | Yes | No | No | No |
| Plain-English component explanations | Yes | No | No | No |
| Real-time parameter tweaking | Yes | No | No | Partial |
| Works on any device with a browser | Yes | No | No | No |
| Learn-as-you-go interface | Yes | No | Partial | No |
| Free to start | Yes | Yes | No | Yes |
| SPICE-level accuracy | No | Yes | Yes | Yes |
| Custom circuit design from scratch | No | Yes | Yes | Yes |
PedalLab doesn't replace SPICE — it's a faster way to explore "what does changing this component do?" before you fire up the soldering iron.
Start free. Upgrade when you want more pedals.