Start free, and stay free as long as you want.
When you want the tools that save the most time, like the circuit calculators, the circuit blocks, a parts list with buy links, and Export for KiCad (beta), Pro takes away every limit. A whole year costs about the same as one pedal.
Every new account gets 7 days of Pro free, and you don't need a credit card.
Draw a circuit, press Run, and hear a real guitar play through it, free for as long as you want.
- The full drawing screen and simulator, with the one big Run button
- Plain English warnings that light up the part that's causing the problem
- The frequency curve, the waveform in real volts, and the voltage at every point
- Hear a real guitar through a NAM amp ten times a month
- All four starter circuits, including the Tube Screamer core
- Up to three knobs on a circuit
- Ten saved circuits
Picking Free still gives you 7 days of Pro. When the 7 days are over, you stay on Free. You aren't charged anything, and nothing gets deleted.
Start freeEvery limit goes away, and you get the tools that save you the most time. A whole year costs about the same as one pedal.
- All sixteen circuit calculators. Move the sliders, watch the curve, and put the finished circuit right into your drawing. We add more every month.
- All twelve circuit blocks, six gain stages and six tone stacks you add with one click instead of drawing them part by part. We add more every month.
- My Blocks, so your favorite circuits are ready for every build after this one
- Hear your guitar through your circuit as many times as you want
- Unlimited knobs, and unlimited saved circuits for normal use
- A clear schematic PDF to print, and a parts list with a buy link for every part
- Export for KiCad (beta), so every part and connection goes into KiCad, ready for you to lay out the board
- The circuit file itself, to keep or share
- Coming soon for subscribers: LTspice import and export, and harmonics for clipping circuits
Save $87 compared to paying every 3 months
Your plan renews on its own until you cancel. You can cancel any time from Manage plan inside the app.
For pedal companies, shops, and schools with more than one builder. Tell us how many people need it, and we'll work with you.
Ask about Pedal Spice for TeamsTell us what your team needs.
For pedal companies, shops, and schools with more than one builder. Tell us how many people need it, and we'll work with you.
Here's everything on each plan, side by side.
| What you get | Free | Pro |
|---|---|---|
| The drawing screen, the simulator, and the big Run button | Included | Included |
| The frequency curve and the waveform in real volts | Included | Included |
| The voltage at every point, plus input and output impedance | Included | Included |
| Plain English warnings that light up the problem part | Included | Included |
| Try several values at once on one graph | Included | Included |
| Real pots with five tapers, and real switches | Included | Included |
| Hear a real guitar through NAM amps | 10 times a month | As many as you want |
| Starter circuits | All four | All four |
| Knobs on a circuit | Up to 3 | Unlimited |
| Saved circuits | 10 | Unlimited for normal use |
| Circuit calculators | Not included | All sixteen, with more every month |
| Circuit blocks | Not included | All twelve, with more every month |
| My Blocks, your own saved circuits | Not included | Included |
| Schematic PDF, parts list with buy links, and circuit file | Not included | All of them |
| Export for KiCad (beta) | Not included | Included |
| LTspice import and export | Not included | Coming soon |
| Harmonics for clipping circuits | Not included | Coming soon |
Draw it, run it, and hear it.
Draw it
Drag out the parts pedal builders use, wire them up, and type the values the way you already write them, like 4k7, 4.7k, or 100n.
Run it
Press the one big Run button, and you'll see the frequency curve, the waveform in real volts, and your voltages. There's nothing to set up, and you can't mess it up.
Hear it
Play a real guitar through what you drew and into a NAM amp, or use your own playing and your own amp file. Turn a knob, play it again, and hear what changed.
Here are the questions people ask before they start.
Is PedalSpice free?
Yes. There's a Free plan you can keep as long as you want. Every new account also gets 7 days of Pro free first, and you don't need a credit card.
How much does it cost?
Pro is $79 every 3 months, or $229 a year. The yearly plan comes to $19.09 a month and saves you $87. A whole year costs about the same as one pedal.
Why would I pay for PedalSpice when LTspice and other programs are free?
PedalSpice is much easier to use, and it's made just for pedal builders. But there's another big reason. When a free program gives you trouble, there's usually no one to ask. You're left to figure it out yourself, or post on a forum and hope someone answers someday. When you pay for PedalSpice, you get help from us when you need it. You also get new parts, circuit blocks, and calculators every month. Everything we do is about making PedalSpice more useful to you.
Do I need a credit card to start?
No. Every new account gets 7 days of Pro free. You only enter a card if you want to keep using Pro after the 7 days.
What happens when the free trial ends?
Your account goes to Free, and everything you made stays. You keep all four starter circuits, up to three knobs on a circuit, ten guitar plays a month, and ten saved circuits.
If I stop paying, do I lose my circuits?
No. We never take away anything you already made. The Free limits only count when you add something new.
How do I cancel?
Use the Manage plan button inside the app. It opens the billing page, and you can cancel there any time.
What will show up on my card?
PedalSpice is owned by the Wampler Pedals company, so the charge shows the Wampler Pedals name along with PEDALSPICE.
Do I need to know SPICE or be an engineer to use it?
No. If you can read a pedal schematic and draw one, you can use PedalSpice. It runs a real SPICE simulation behind the scenes, but you never have to type a command or pick a setting for it.
Do I have to download or install anything?
No. It works in the web browser on almost any computer, like a Mac, a Windows computer, a Linux computer, or a Chromebook.
Draw it, Hear it, Perfect it - Before you build it
Start free, open the Tube Screamer core, change one part, and play a guitar clip through it. You'll still want to breadboard it to know for sure, but you'll know whether the idea is worth your parts and your evening before you spend either one.
Every new account gets 7 days of Pro free, and you don't need a credit card.
