Stop planning your wiring on a napkin.
PCB Arena is a canvas that knows what a pin is. Drag in an ESP32, an Arduino or a Pi, wire it to real labelled GPIO, and walk away with a diagram, a build checklist, and a netlist. Then publish it, or go see how someone else wired the same idea.
Planning tool, not a simulator. Nothing on the canvas is electrically live: PCB Arena will not tell you a circuit works, only what you said you would connect.
6 boards
Pin-accurate, out of the box
3 exports
Image, pin list, netlist
Community
Publish, browse, remix
iPhone
Built for iOS
Domain knowledge, not shapes
General diagram apps give you rectangles and arrows. Desktop EDA tools assume you are ready to fabricate a board. PCB Arena is for the step in between: you know roughly what you are building, and you want to get the connections right before you solder.
Real boards, real pins
ESP32, Arduino Uno and Nano, Raspberry Pi 4, 5 and Pico, each with its actual labelled pinout. You wire GPIO4 to an anode because that is the pin you tapped, not because you drew a line to a generic box.
A canvas built for wiring
Pinch, pan, drag, rotate, group into labelled frames, undo without fear. Wires snap to valid pins and come in two styles: physical wiring, or block-style signal flow for a conceptual diagram.
Parts that are not in the library
Build a custom component with your own name, shape and pin list for a carrier board or a module nobody stocks a symbol for, then drop it into a diagram like any other part.
Three ways off the canvas
A diagram is only useful if it leaves the app. Every project exports three ways, each aimed at a different moment: showing someone, building it, or taking it further.
Image and PDF
A clean render of the whole canvas or one frame, for a forum post, a client handoff, or something to print and keep next to the breadboard.
Pin list
An auto-generated table of every connection, pin to pin, with labels. A checklist you can work down while you actually wire the thing.
KiCad-compatible netlist
Connectivity, exported in a format KiCad imports, so moving to real PCB work does not mean re-entering every connection by hand. Connectivity only: no footprints, no layout.
Publish it, or keep it to yourself
Browsing how other people wired a similar build is half the value of writing it down in the first place. That is in from day one, and so is the choice not to take part.
Publish or keep it private
Every project is private by default. Make one public to put it in the feed, or unlisted to share a link with one person and nobody else.
Browse and remix
Look through what other makers wired, sorted by newest or most liked, filtered by board. Remix any public project into your own editable copy, with attribution back to the original.
Lock the app
Set a PIN or use Face ID to lock PCB Arena behind your face. The passcode stays in your device keychain and never reaches a server.
The whole tool is free to use
Every board, every export format and unlimited public projects are free. PCB Arena Pro is a subscription that lifts the cap on private and unlisted projects, removes the small footer from image and PDF exports, and keeps your custom components in a library that follows you across projects.
Get the connections right first.
PCB Arena is coming to iPhone. Plan the wiring, check the pin list, and solder once.
App Store
iPhone and iPad