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A library to write Gerber files

Project description


A Python library for writing Gerber files.

  • The API is much simpler than the Gerber format specification - 8 pages vs 200.

  • No need to read the 200 page Gerber format specification.

  • All common pad shapes are built-in.

  • User-defined pads shapes are easily created.

  • 100% compliance with revision 2023.08 of the Gerber Layer Format Specification.

  • Conservative, robust output files.

  • Risky constructs failing in some buggy applications are avoided.

  • Standardized meta information for fabrication, such as which pads are vias.

  • Input parameters are checked for compliance with the Gerber spec.

  • Stateless input (the gerber_writer takes care of the Gerber states).


from gerber_writer import DataLayer, Circle, RoundedRectangle

trace_width = 0.127
via_pad = Circle(0.508, 'ViaPad')
IC17_toe = RoundedRectangle(1.257, 2.286, 0.254, 'SMDPad,CuDef')
toe_point = (0, 2.54)
via_point = (5.08, 0)

top = DataLayer('Copper,L1,Top,Signal')

top.add_pad(IC17_toe, toe_point, angle=45)
top.add_trace_line(toe_point, (2.54, 0), trace_width, 'Conductor')
top.add_trace_line((2.54, 0), via_point, trace_width, 'Conductor')
top.add_pad(via_pad, via_point)

with open('gerbers\gerber_writer_example_small.gbr', 'w') as outfile:



$ py -m pip install gerber_writer


$ python3 -m pip install gerber_writer


  • Python 3.9 or higher

  • Standard library only.

  • OS independent.


Apache 2.0 license


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