Laser output uses GRBL laser mode (M4 dynamic power). Make sure laser mode is on in your controller ($32=1), focus the laser on the material surface, and wear the safety glasses for your laser.
Feeds in inches per minute. Defaults suit wood with a 1/8" bit; check your bit maker's chart.
How to run it in Easel or another sender
Clamp your material and set X0 Y0 at the front-left corner and Z0 on the top surface (the same as Easel's default).
In Easel, use the G-code import option and open the .nc file. Or open it in Universal G-code Sender, Candle or gSender.
Install the same bit and size you chose here.
Do a test run in the air (raise Z) or on scrap first, wear eye and ear protection, and never leave the machine running unattended.
Everything runs in your browser; your images are never uploaded. Always double-check toolpaths before cutting.