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Interactive Diagram Editor

The diagram editor provides an interactive way to edit your diagram: add components to the simulation and define the connections between them. It's a convenient alternative for editing the diagram.json file directly.

Editing parts

Adding a part

To add a new part, click on the blue "+" button at the top of the diagram editor (or press "A" while the diagram is in focus).

You'll see a menu with a list of parts you can add. Choose a part to add it. The part will be added at position (0, 0), and then you can drag it to the desired position.

Not all parts are currently available through the menu. For example, MCU boards and micro-controllers such as the Arduino Nano or the ATtiny85 are missing. You can still add these parts by editing diagram.json directly.

Moving a part

Move a part by clicking on it and then dragging it with your mouse.

Rotating a part

Rotate a part by clicking on it (to select it) and then pressing "R". The part will rotate 90 degrees clockwise. If you need to rotate a part by a different amount (e.g. 45 degrees), you can achieve that by editing diagram.json.

Duplicating a part

Create a new copy of a part by clicking on it (to select it) and the pressing "D". You can press "D" several times to create multiple copies of the part.

Deleting a part

Delete a part by clicking on it (to select it) and then pressing the Delete button.

Selecting multiple parts

Select multiple parts by clicking on the parts with the Shift key pressed. You can then move all the parts together, duplicate them (using the "D" key), or delete them using the Delete key.

Copying and pasting parts

You can copy the selects part(s) by using the standard Copy keyboard shortcut (Ctrl+C or ⌘+C). If you selected multiple parts, all the wires that connect the selected parts are also copied. The parts you copied are stored in your system clipboard in a JSON format, similar to the diagram.json format.

To paste the parts you copied, click on the diagram and press the standard Paste keyboard (Ctrl+V or ⌘+V). In some cases, the parts will be pasted outside of the currently visible diagram area, so you may have to zoom out in order to find them. This will be fixed in the future.

You can use the copy-paste feature between different project, and quickly copy several parts (including all the internal connections) at once.

Editing wires

Creating a wire between two parts

To create a new wire between two parts, click on one of the pins that you'd like to connect. Then click on the second (target) pin. This will create the wire.

If you want the wire to go in a specific way, you can guide it by clicking where you want it to go after selecting the first pin.

To cancel a new wire (delete it without selecting a target pin) click the right mouse button or press Escape.

Changing the color of a wire

The color of new wires is automatically determined by the function of the pin: wires starting from ground pins are black, 5 V pins are red, and other wires are green.

You can change the color of a wire by clicking on it, and then selecting a new color for the wire. You can also use the following keyboard shortcuts to set wire colors:


These keyboard shortcuts also work while drawing a new wire. You can also change wire colors by editing diagram.json

Deleting a wire

Select a wire by clicking on it, and then click the trash icon on the wire (or press the Delete key). You can also delete a wire by double-clicking on it.

Keyboard shortcuts

The following table summarizes the keyboard shortcuts:

-Zoom out
+Zoom in
FFit diagram to window (auto zoom)
AAdd a part
DDuplicate (copy) the selected part
RRotate the selected part
DeleteDelete the selected part / wire
?Open documentation for the selected part
EscapeCancel wire (in wiring mode)
GToggle grid and ruler display
ShiftDisable grid snapping while dragging
AltFine grid snapping while dragging
CtrlFine grid snapping while dragging
Ctrl+ZUndo *
Ctrl+YRedo *

* On Mac, use ⌘ instead of Ctrl

Firefox users: if the keyboard shortcuts don't work for you, please make sure that the "Search for text when you start typing" setting is disabled.

Grid snapping

Parts and wires automatically snap to a 2.54 mm (0.1 inches) grid. The grid is invisible by default.

The Shift key temporarily disables the grid snapping and allows free movement of parts and wires.

The Alt key or the Ctrl key temporarily toggle to fine grid snapping. The fine grid is 1.27 mm (0.05 inches) wide.

Press "G" to toggle the display of the grid and rulers. Tick labels on the rulers show measurements in millimetres (the default), but you can switch to inches by clicking on the units in the top right corner.

When you start the simulation, Wokwi hides the grid. Stopping the simulation restores the grid.