Look at the files, thre is a compare about different amount of the triangles (polygons) . Also on website you can try.
UPDATES:
11.11.2023 - BUNNY EXAMPLE
MORE EXAMPLES SOON
You can simplify Your STL model here (using vertice reduction). Simply choose a file, and specify vertices amount You wish to have and save to file.
Using models with more vertices than 10k may be really slow, more than 100k may be crippling for most browsers.
This website works fully offline. Your file will not be uploaded.
The author marked this model as their own original creation.