How do I open a .kicad_pcb file?

Drop a .kicad_pcb file onto Analyser at https://lab.valjdakosta.com/ and it opens directly in your browser - no upload, no account and no software to install. Open KiCad schematics, circuit boards, footprints and projects in the browser. Analyser parses the S-expression documents - schematics (.kicad_sch), boards (.kicad_pcb), symbol libraries (.kicad_sym) and footprint modules (.kicad_mod), including the "-bak" backups - and rebuilds the geometry as an interactive vector view: schematic symbols, wires, junctions and labels, or the board outline, copper tracks, pads, vias, zones and silkscreen, with pan, zoom and per-layer visibility toggles. It reads the project settings (.kicad_pro / .kicad_prl JSON) with its net classes, the library tables, the footprint cache and the ngspice simulation workbook (.wbk), and plots the SPICE simulation waveforms (.raw) from KiCad/ngspice or LTspice - decoding the analysis type, variables and samples to chart the traces or tabulate an operating point. Dropping a whole project folder opens every document together as one design with a combined bill of materials that cross-probes each part to its symbol on the schematic and its footprint on the board. Nothing is uploaded.

Can I open a .kicad_pcb file online for free?

Yes. Analyser is a free online .kicad_pcb opener and viewer that runs entirely in your browser - your .kicad_pcb file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.kicad_pcb file - what it is and how to open it online

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What is a .kicad_pcb file?

A .kicad_pcb file is a printed-circuit-board layout from KiCad. Created and opened by KiCad.

Did you know: KiCad is a free, open-source PCB suite backed by CERN, widely used in open hardware.
A .kicad_pcb file is written in S-expressions, the nested parenthesised syntax borrowed from Lisp, and is plain readable ASCII.
The S-expression board format arrived in KiCad 4, replacing the older .brd layout files with a more maintainable structure.
What Analyser shows you: Open KiCad schematics, circuit boards, footprints and projects in the browser. Analyser parses the S-expression documents - schematics (.kicad_sch), boards (.kicad_pcb), symbol libraries (.kicad_sym) and footprint modules (.kicad_mod), including the "-bak" backups - and rebuilds the geometry as an interactive vector view: schematic symbols, wires, junctions and labels, or the board outline, copper tracks, pads, vias, zones and silkscreen, with pan, zoom and per-layer visibility toggles. It reads the project settings (.kicad_pro / .kicad_prl JSON) with its net classes, the library tables, the footprint cache and the ngspice simulation workbook (.wbk), and plots the SPICE simulation waveforms (.raw) from KiCad/ngspice or LTspice - decoding the analysis type, variables and samples to chart the traces or tabulate an operating point. Dropping a whole project folder opens every document together as one design with a combined bill of materials that cross-probes each part to its symbol on the schematic and its footprint on the board. Nothing is uploaded.
Open a .kicad_pcb file: Drag a .kicad_pcb file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
Related formats: .kicad_sch · .kicad_sym · .kicad_mod · .kicad_pro · .kicad_prl. See all supported file types.