About CircuitDiagramMaker

CircuitDiagramMaker is a free, browser-based editor for circuit, wiring, and schematic diagrams. It runs entirely in your web browser — no download, no install — on desktop, tablet, and phone, and keeps working offline. The editor includes a built-in SPICE simulation engine (DC operating point, transient, and AC analysis), a library of 480+ electrical and electronic symbols across four packs (DIY, Hobbyist, Pro, and Industrial), A* auto-routing, multi-page sheets with off-page connectors, a Design Rule Check, bill-of-materials export, and export to PNG, SVG, PDF, DXF, and SPICE netlist.

Alongside the editor, the site publishes a reference layer: more than 3,000 interactive reference wiring and circuit diagrams, a 482-symbol reference library covering each symbol's meaning, IEC vs ANSI standard forms, terminals, and typical uses, and fundamentals explainers on logic gates, adders, flip-flops, rectifiers, Ohm's law, and more.

How the reference content is produced

Symbols are drawn to the conventions of IEC 60617 (the international standard), ANSI/IEEE Y32.2 (the US standard), and ISO 1219 where fluid-power symbols apply. Where the IEC and ANSI forms differ — the resistor is the classic example — the symbol pages show both forms side by side and say which regions use which.

Reference diagrams are built in the same editor everyone uses, then schematically validated before publication: connectivity is checked so every wire terminates on a real terminal, nets are continuous across sheets, and components carry standard designators (R1, K1, F1). Where a topic touches installation practice, articles reference the applicable wiring code — NEC (NFPA 70) or BS 7671 — where applicable. Reference diagrams remain generic and illustrative; they are not installation drawings for any specific premises.

Editorial and safety policy

Everything published on this site is educational reference material. Reference diagrams are generic, illustrative, and for educational use only. Fixed electrical installation work must be carried out by a licensed electrician in accordance with the applicable local wiring code (e.g. NEC/NFPA 70, BS 7671, AS/NZS 3000, IEC 60364). Simulation results are idealized models — always verify with real measurement before relying on them.

We correct errors when they are found. If you spot a mistake in a symbol page or reference diagram, email us and we will review and fix it.

Contact

Email: hello@circuitdiagrammaker.app. See also Features, Pricing, Terms of Service, and Privacy Policy.