One of the most widespread formats within electronic business environments is Gerber (RS-274X), which is used to produce mass market printed circuit boards (PCBs).
If we have the need to open a file with this format, we can use a tool like Gerbv, that offers us the opportunity to print the files that we have, as well as exporting what we are viewing in PNG, PS, SVG or PDF format.
A viewer for Gerber files
The program allows you to open several circuit designs, with one on top of the other, so as to make it much easier to carry out measurements or comparing two different models. It's possible to change the measurement units between centimeters, millimeters and inches with a single click of the mouse.
The interface is very simple and leaves all the controls at the top of the screen, leaving the left side to show the layers that we are using.
If you're looking for a free tool with which you'll be able to analyze and validate Gerber (RS-274X) files, try downloading Gerbv.