Gerber inner routing layer 2 file
File type: 3d graphics, CAD-CAM-CAE file
Files with the g2 file extension are Gerber plot files for the second inner routing layer of a printed circuit board (PCB).
The files are generated and used with Altium Designer for PCB design and manufacturing output.
File type category:
3d graphics, CAD-CAM-CAE file
Date updated: October 30, 2026
The g2 file extension identifies a Gerber output file for inner routing layer 2. It contains graphical PCB data for that layer, such as copper traces, vias, pads, and other features represented in the layer image.
Gerber files are used by PCB manufacturers to create the individual circuit-board layers. A complete manufacturing output normally contains separate files for the other copper, solder-mask, silkscreen, and board layers. Gerber manufacturing output can also contain information for drilling and milling the completed circuit board.
Altium Designer, from Altium, can generate this file as part of a PCB Gerber output set. Altium Designer is available for Microsoft Windows. Gerber remains a commonly used manufacturing exchange format, although the exact file extension depends on the PCB software's output settings.
Open the g2 file in Altium Designer using its Gerber viewing or CAM tools. Because it represents one layer of a PCB, it is most useful when viewed together with the other files generated for the same board.
The file is manufacturing output rather than the complete editable Altium PCB design, so opening it does not restore the original schematic or board-design objects.
A g2 file is already a Gerber manufacturing layer, so it usually does not need conversion. If a different Gerber output is required, the layer should normally be regenerated from the original PCB project in Altium Designer with the required output settings.
Converting the file to a general image format can preserve its appearance for reference, but it does not provide a suitable replacement for manufacturing data.
Software apps that import g2 files:
Microsoft Windows
Software apps that export g2 files:
Microsoft Windows
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