While most 3D models are shared as that you must "slice" yourself, several repositories host pre-configured G-code specifically for the Ender 3 series.
Finding the right is a common first step for new 3D printing enthusiasts. Whether you are looking for the original test files that came with your printer or utility G-code to level your bed, getting the correct file is vital for a successful print. Where to Download Ender 3 G-code Files ender 3 gcode download