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Life & fun · February 28, 2012

CircuitLab, an in-browser schematic editor and circuit simulator

Powerful online circuit simulator and schematic editor. Easy to learn.

CircuitLab, an in-browser schematic editor and circuit simulator launched on February 28, 2012 with 46 votes, #42 of 360 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 14 years on.

Visit circuitlab.com ↗Alternativestop 12% of February 2012

In plain words

CircuitLab is a browser-based schematic editor and circuit simulator for designing and analyzing electronic systems. It combines an interactive textbook with tools for drawing circuits and running mixed-mode simulations that handle both analog and digital components. The platform features easy-wiring mode to reduce clicks, SPICE-like component models for accurate results, and human-friendly value formatting. Users can share circuits within the community and explore others' designs through copy-paste functionality. It is designed for anyone learning or working with electronics.

written from the facts on this page · September 2026

From the sources

Master the analysis and design of electronic systems with CircuitLab's free, interactive, online electronics textbook. Easy-wire mode lets you connect elements with fewer clicks and less frustration. Cross-window copy/paste lets you easily explore and re-mix parts of public circuits from the CircuitLab community. Mixed-mode circuit simulation lets you simulate analog and digital components side-by-side. SPICE-like component models give you accurate results for nonlinear circuit effects. Human-friendly formats let you enter and display values concisely, just like you would on a paper schematic. Unit-aware expression evaluation lets you plot arbitrary signals of interest, such as differential…from circuitlab.com

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