Top Online Circuit Simulators (2025)

Designing and testing circuits has come a long way. Today, online circuit simulators make it possible to experiment with electronics without needing a bunch of physical components. Whether you’re a student just starting out or an experienced engineer, these tools allow you to build, test, and tweak your circuits directly in your browser. They’re not only more accessible but also a lot more affordable than traditional setups. In this post, we’ll explore some of the top circuit simulators you should check out in 2025, and why they’re so popular with hobbyists and professionals alike.

1. Tinkercad Circuits

Tinkercad offers a simple, user-friendly interface for designing circuits and simulating Arduino-based projects. You can drag-and-drop components and write code for microcontrollers, making it great for learning electronics and prototyping.

• Pros:
  • Very easy to use, ideal for beginners
  • Supports microcontroller simulation (Arduino)
  • No installation required, works directly in the browser
• Cons:
  • Limited advanced simulation features
  • Not ideal for complex, professional-grade circuits
  • Fewer component options compared to other simulators
• Best For: Beginners and hobbyists
• Website: Tinkercad

2. Falstad Circuit Simulator

This is a browser-based, interactive circuit simulator that visually displays voltage, current, and power as you modify the circuit. It supports both analog and digital circuits and is very useful for real-time learning.

• Pros:
  • Simple and intuitive interface
  • Real-time feedback on circuit behavior
  • No installation required, runs directly in the browser
• Cons:
  • Limited advanced analysis tools (e.g., no SPICE simulation)
  • Fewer components compared to other tools
  • Not suitable for designing complex, multi-layer PCBs
• Best For: Intermediate users
• Website: Falstad

3. CircuitLab

CircuitLab is a browser-based tool that allows you to simulate both analog and digital circuits. It features real-time analysis of voltages, currents, and waveforms, making it ideal for students, educators, and engineers.

• Pros:
  • Supports both analog and digital circuit simulation
  • Real-time feedback with waveform analysis
  • Clean, professional interface
• Cons:
  • Requires a subscription for advanced features
  • Might be too complex for beginners
  • Limited PCB design and fabrication tools
• Best For: Intermediate to advanced users
• Website: CircuitLab

4. Logisim (Web Version)

Logisim is focused on teaching digital electronics. It allows you to design and simulate both combinational and sequential logic circuits. The web version is intuitive and widely used in educational settings.

• Pros:
  • Excellent for learning and teaching digital logic
  • Interactive and easy to use
  • Great for designing logic circuits (e.g., flip-flops, multiplexers)
• Cons:
  • Limited to digital circuits (not suitable for analog design)
  • No real-time current/voltage feedback
  • Limited component library for advanced digital designs
• Best For: Learning digital circuits
• Website: Logisim

5. MultiSim (Web Version)

MultiSim is a powerful SPICE-based circuit simulator, ideal for both analog and digital circuits. The web version provides the essential features for circuit design, simulation, and real-time analysis, often used in both educational and professional environments.

• Pros:
  • Industry-grade simulation tool
  • Detailed analysis and real-time data feedback
  • Ideal for both education and professional work
• Cons:
  • Some features require a paid subscription
  • Can be overwhelming for beginners due to its complexity
  • Limited to analog and digital circuits, not focused on PCB design
• Best For: Intermediate to advanced users
• Website: MultiSim

Conclusion

Online circuit simulators have truly transformed the way we approach electronics, making it easier than ever to design, test, and learn. Whether you’re just starting out or you’re an experienced pro, the tools available in 2025 offer something for everyone—whether it’s ease of use, powerful features, or the ability to collaborate with others. With the continued advancements in technology, these simulators are only going to get better. So, if you’re looking to bring your next circuit idea to life, give one of these simulators a try, you might just be surprised at how much you can accomplish without needing a physical lab.