Best PIC Simulators and Free Microcontroller Simulators: An Honest Roundup
Verdict: There is no single “best” PIC simulator — there is a best fit per job. For free, board-level PIC simulation on your own machine, PICSimLab is our top pick: it is open source, works offline, and simulates the actual trainer and development boards PIC courses use. For source-level PIC debugging inside the official IDE, the simulator built into MPLAB X is the reference tool — and it pairs with PICSimLab rather than competing with it. For schematic + PCB + simulation in one professional suite, Proteus is the paid standard, priced by a configurator quote rather than a fixed public price. For zero-install browser simulation, Wokwi leads, with paid plans from around €5.6/month (checked Oct 2026). For a free circuit-first alternative, SimulIDE is the other open-source desktop option. The table and the per-audience picks below explain the trade-offs honestly — including where our own featured tool is not the answer.
The five simulators compared
| Simulator | Price | Model | PIC coverage | Runs | Best for |
|---|---|---|---|---|---|
| PICSimLab | Free, open source (GPL-2.0) | Board-level emulation of 21 development boards with spare parts | Strong: PIC16F/PIC18F trainer boards (PIC16F877A, PIC18F4550 and more), plus AVR, STM32F103, ESP32 | Windows, Linux, macOS, offline; limited online version | Students and hobbyists learning PIC on realistic boards, free |
| MPLAB X Simulator | Free with MPLAB X IDE | Software model of the chip inside the IDE | Broadest PIC range (follows MPLAB X device support), Microchip devices only | Wherever MPLAB X runs | Source-level debugging of PIC code |
| Proteus (Labcenter) | Paid; packages assembled and quoted via its Configurator (no fixed public price we can quote) | Schematic-driven circuit simulation within a full EDA suite (schematic + PCB + VSM) | PIC families available as VSM modules in the quoted package | Windows desktop | Schools and professionals needing schematic-to-PCB in one tool |
| Wokwi | Free tier; paid plans from around €5.6/month (checked Oct 2026) | Browser-based, freely wired boards and components, shareable by link | Limited compared with its Arduino/ESP32 strength | Any modern browser (internet required) | Quick shared demos and Arduino/ESP32 sketches |
| SimulIDE | Free, open source (AGPL); voluntary donations via Open Collective | Circuit-level: components and a microcontroller wired on a canvas | PIC among its simulated microcontroller components | Desktop operating systems | Learning electronics circuit-first, free |
Recommendations by audience
Students
Start with PICSimLab + the MPLAB X simulator together. They are both free, and together they cover the whole learning loop: write XC8 code in MPLAB X, debug the logic in its simulator, then run the same firmware on a simulated McLab2 or PICGenios board in PICSimLab and watch the LCD, keypad and LEDs respond. Our first PIC16F877A project tutorial is a good starting point, and the head-to-head details are in PICSimLab vs the MPLAB X Simulator. Add Wokwi when you need to share a running demo with a link, and SimulIDE when a class exercise is about wiring the circuit itself.
Teachers
For a PIC course built around trainer boards, PICSimLab mirrors the hardware students will meet in the lab, works offline on ordinary lab PCs, and costs the department nothing — the board pages such as McLab2 document exactly which chips each board covers. If your curriculum instead teaches schematic capture and PCB design as one subject, that is Proteus territory, with institutional licensing handled through Labcenter’s distributors and configurator quotes — see PICSimLab vs Proteus for the honest split. Wokwi’s shareable links are handy for homework demos where installs are impossible; its classroom terms are a separate enquiry with Wokwi.
Advanced users and hobbyists moving to hardware
Use the MPLAB X simulator for register-level logic checks, PICSimLab for board integration (spare parts, serial, the oscilloscope — see the oscilloscope guide), and keep Proteus in mind only if custom PCB design enters the workflow. Beyond PIC, PICSimLab’s Blue Pill and ESP32 boards let the same habits carry over — with the honest limits stated on those pages (two STM32F103 chips only; ESP32 wireless support is incremental). Our remaining comparisons, PICSimLab vs Wokwi and PICSimLab vs SimulIDE, dig into the browser and circuit-first alternatives.
A note on honesty in roundups like this
Simulator roundups often invent prices, star ratings and “best overall” winners. We do not: Proteus pricing is configurator-quoted so we quote no number; Wokwi’s paid-plan figure is the one we checked in Oct 2026 and is dated as such; PICSimLab’s limits (21 boards, two STM32 chips, a limited online version) are stated on this page and in our download page, which links only to the official GitHub release files. PICSimLab is the tool this site documents, so judge our top pick by the trade-offs in the table — where another tool fits better, we have said so.
From simulation to real hardware
Every simulator on this page is preparation for a real board. The usual student shopping list, matched to the boards these tools simulate:
- An ESP32 development board — for the ESP32 projects simulated in PICSimLab and Wokwi.
- An Arduino Uno — the ATmega328P board covered by PICSimLab, Wokwi and SimulIDE alike; a full ELEGOO starter kit adds the breadboard and components around it.
- An STM32 Blue Pill board — the F103 board from PICSimLab’s QEMU backend.
- A PICkit programmer — essential once PIC projects leave the simulator for real chips.
- To go further with PCB fabrication for a finished project, see PCBWay and JLCPCB (referral links, not cash affiliate programmes — both are useful student fabrication services).
- For structured learning alongside practice: embedded courses on Udemy and certificate programmes on Coursera.
These links are affiliate or referral links routed through our /go/ redirects — see our affiliate disclosure. They never change the price you pay.