A customer emails you a program file and asks “is this the current rev?” A new operator wants to check which part is on the nest before hitting cycle start. You’re at home and someone texts asking whether the job on the machine has tabs. In every case you have the same problem: an .LST, .NC, or .ORD file, and no way to look at it without walking to the machine or opening a full CAM seat.
These files are just text — you can open them in Notepad — but a wall of G-code coordinates tells a human almost nothing. What you actually want is to see the paths.
What These Files Are
G-code (.nc, .g) is the common language of CNC — moves, arcs, and machine functions, one command per line. .LST is the format Trumpf lasers run, wrapping the geometry with tooling and setup data. .ORD is the ordered-path format waterjet controllers use. Different dialects, same idea: a list of motions your machine will execute exactly as written — including any mistake nobody caught.
Why You Should Look Before You Cut
The five minutes before cycle start is the cheapest place to catch a problem. Is this the right part and the right rev? Are the leads and pierces landing inside scrap, not inside the part? Did the tabs make it into the program, or is the skeleton going to drop parts into the slats? Is the cut sequence sane, or does it cut the inner holes after the outer contour has already freed the part? All of that is invisible in a text editor and obvious in a picture.
View It in Your Browser
That’s exactly what our free NC File Viewer is for. Drag the file into the page and it draws the program — no install, no signup, no CAM license. It reads .LST, G-code (.g / .nc), and .ORD files.
And because customer programs are often under NDA: the viewer is 100% client-side. The file renders in your browser and never leaves your machine. There is no server on the other end, which you can verify by loading the page once and then pulling your network cable — it keeps working.
Bookmark it on the shop computer and on your phone. The next “hey, can you check this program” costs you thirty seconds instead of a trip to the machine.