I think the thing to keep in mind, as you are an IT professional interested in web development, is that there are no certifications in web development. There are certificates, yes...simply meaning we get a certificate for completing a course, but its not the same as being certified that IT requires.. The only possible equivalent to an IT certification is a portfolio..
To be super blunt, there is zero value in certifications in development...Even a degree in Computer Science wont help if you dont have the right skills. All the the value is in what you learn and your ability to demonstrate that knowledge.
While an IT resume with certifications is enough to get you an interview, its just not so in development. Even if you look good on paper, they will look at your portfolio and Ive heard, also your github to see examples of your code. If they dont like what they see, theres will be no interview...nothing you put in your resume will make up for that.
So dont chase certificates, chase knowledge...chase opportunities to create projects you can show perspective employers..cause that is what will get you in the door.