If you can explain why you're going back to junior, employers will be more than ok with it. Today it's not uncommon to see people changing careers in the industry, you seem to be going from a freelancer/"webmaster" type of role to a better-paid SWE career. Not a big jump, but still a change.

Do you get contacted by recruiters? It's in their interest to be honest to you about your chances, they might be able to provide good feedback or even direct you to companies that fit you.