I am unsure if you can because sometimes it is considered informal but i have heard that it is fine from others. Thanks!
Hi @Theodorian,
Yes you can use contractions in the common app essay. I would only caution you not to use them if your essay doesn't seem to flow or read better because of them. If you are looking for a way to increase word count, that might not be a "net-positive" thing to do which is replacing all words with contractions to gain say 10 more word count. It would be better to eliminate unnecessary sentences instead.
Good luck.
To keep this community safe and supportive: