Can you submit to Arxiv without an institutional affiliation? I have recently taken an interest in Arxiv because of how easily accessible it is to the public and I've used it myself a few times. There is some work I want to submit to them which was not through an institution, but rather purely on my own. 

I still wouldn't submit something unless I had feedback from others, so I am still having the content peer-reviewed by colleagues who would be willing to endorse the the article if they thought it was thorough. But, the problem is Arxiv specifically "requires" that I put an institution I am affiliated with for an article submission even though this work is not affiliated with any. 

What should I put if I do not necessarily have an institutional affiliation? Does Arxiv accept anything that isn't through an institution?
I've had no affiliation while submitting to the arxiv regularly before.  I just use "N/A" in that field of my profile.  Never had a problem.

Others have asked very similar questions before. These all seem to be about people having previously posted with an affiliation to now losing or changing their affiliation, rather than someone who has never posted. The former would be my own situation. Still, the key to entry is getting endorsed.  Once you're in, you are permanently in, short of administrative actions for violations. These could happen if, say, you falsely report your affiliation.  But simply not having an affiliation is not an issue.