online Gcode Simulator to Track coordinates

Hello all, I am looking for an online app that will allow me to paste a gcode coordinate to see where on the bed the coordinate lands. What I am trying to do is level the bed for a specific print. The typical way I level it that works is not working. Part of the print mucks up. Luckily its something I think I can fix if I can send the printer through the motions I think maybe 10 lines at a time then pause it; so I may measure the distance to the print bed with out extruding anything. If anyone knows of such a sim please let me know.

openscad is not online but you can specify x,y,z coordinates on the left side of the app and see where the object lands on the bed on the right hand side of the app.

Might do what you are looking for.