KiCad Schematic Viewer Online — View .kicad_sch Files Instantly

View KiCad Schematics Without Installing KiCad

KiCad is the most popular open-source EDA tool, and .kicad_sch is its native schematic format. But installing KiCad just to view a schematic file is overkill — especially when you only need a quick look at a circuit diagram from a colleague, a GitHub repository, or an open-source project. MakerSuite 3D lets you open any .kicad_sch file directly in your browser with full component and net visualization.

Step-by-Step: View a .kicad_sch File Online

1. Open pcbviewer.app — Open pcbviewer.app — no installation or signup needed

2. Drag and drop your .kicad_sch file onto the drop zone
3. The schematic parser reads the S-expression format and extracts all symbols, wires, labels, and power ports
4. Your circuit diagram appears on a 2D Canvas — pan with right mouse, zoom with scroll wheel
5. Use the Parts sidebar to find components by reference (R1, U3, C5) or value (10k, STM32F4)
6. Click any net in the Nets sidebar to highlight all connected wires and pins

KiCad-Specific Schematic Features

• KiCad Symbol Library — Standard schematic symbols for resistors, capacitors, ICs, connectors, and more are rendered with correct pin layout and orientation
• Wire Routing — All wire segments, junctions, and bus connections are parsed and drawn accurately from the .kicad_sch S-expression data
• Net Labels — Global labels, local labels, and hierarchical labels are displayed with their net names for easy signal tracing
• Power Ports — VCC, GND, 3V3, 5V, and other power symbols are color-coded for instant visual identification of power rails
• Text and Notes — Schematic text annotations and design notes are rendered in their correct positions and sizes
• Multi-Sheet Navigation — For projects with multiple schematic sheets, navigate between pages to see the complete design

Supported KiCad Versions

The schematic viewer supports .kicad_sch files from KiCad 6, 7, and 8. These versions use the modern S-expression schematic format. Older KiCad 4/5 .sch files (legacy format) are not currently supported — if you have legacy schematics, open them in KiCad and re-save as .kicad_sch.

Schematic + PCB Viewer in One Tool

MakerSuite 3D is unique in offering both schematic viewing and 3D PCB viewing in the same browser tab. Upload your .kicad_sch to see the circuit diagram, then upload the matching .kicad_pcb to see the physical board layout in 3D. This makes it easy to cross-reference your schematic connections with the actual PCB routing.

Useful Keyboard Shortcuts

• S — Save schematic as PNG screenshot
• ESC — Clear selection and deselect highlighted nets
• Scroll — Zoom in and out on the schematic canvas