Free online circuit diagram maker: draw a schematic, check it, turn it into a PCB

Open the editor and choose Schematic at the top left. The sheet in the middle is your circuit diagram. The left panel holds parts to place by hand. The right panel holds the AI chat, the Check tab and the rest of the tools. You can mix the two: let the AI draw a first version, then fix it by hand, or draw the power section yourself and ask the AI to add the rest.

1. Place parts. The Components panel lists common parts by group (passives, discretes, semiconductors, ICs, connectors, power and more). Search it, then click a part to drop it on the sheet.
2. Wire them. Press W, or pick the wire tool, then click one pin and then another. Junction dots appear where three or more wires meet.
3. Name the nets. Press L on a wire to give it a net label; two wires with the same label are one net. Set a wire’s role to Power or Ground and the editor draws the VCC or GND symbol at its pins.
4. Tidy up. R and Shift+R rotate, Mirror X and Y flip, Delete removes, and Ctrl+Z undoes. Press Q on a pin you are leaving unconnected on purpose.

If the symbols are new to you, the schematic symbols chart explains the common ones, from resistors to logic gates.

In the AI tab, describe the circuit the way you would to an engineer: the main parts by part number, the supply, the currents and frequencies, and which pin does what. The AI chooses real parts, wires the circuit and lays out a board from it. Switch to Schematic to see the sheet, drawn with each part’s KiCad symbol. From there it is an ordinary schematic: edit any of it by hand, or ask for changes in plain English.

The Check tab runs an electrical rule check on the diagram and lists errors and warnings. The Parts & nets panel adds the drawing rules. Between them they look for:

Wiring

Parts with nothing connected, floating pins, wires that end nowhere, conflicting or disconnected net labels, a no-connect pin that is wired, and tee joints without a junction dot.

Power

A circuit with no supply or no ground, and a supply above a part's rated voltage.

Common circuit mistakes

A MOSFET gate that nothing drives, a power MOSFET with no gate resistor, and a relay or motor coil with no flyback diode.

Drawing

Duplicate reference designators, wires drawn through symbols or pins, diagonal wires and pins off the grid.

A sheet with drawing errors is not sent on to the board, so the PCB is never built from a diagram with dangling wires.

When the sheet is right, press Generate PCB from schematic (or Approve → Generate PCB on a sheet the AI drew). The board is built from the sheet as it is now, your edits included: footprints, placement, routing and a design-rule check. From there, the online PCB editor takes over, and how to make a PCB covers the rest, through ordering.

• Export KiCad downloads a self-contained .kicad_sch with the nets labelled, in KiCad 9’s file format.
• Import KiCad 6+ schematics, every sub-sheet included. Older KiCad 5 .sch files need re-saving in a newer KiCad first.
• Export Circuit / Import Circuit save and reload the whole sheet as one .circuit file.

• No PDF or image export of the schematic. Export to KiCad and plot it there.
• No Eagle, EasyEDA or Altium schematic import; KiCad 6+ only.
• No shared editing or share links.
• The hand-placement panel holds common parts. For anything else, describe it to the AI or import it from a KiCad schematic.