Python Accessibility Testing — Explain Like I'm 5

Making Sure Everyone Can Use Your App

Imagine you build a beautiful playground. Swings, slides, climbing walls — everything a kid could want. But there’s one problem: the only way in is a narrow staircase. Kids in wheelchairs can’t get in at all.

Accessibility testing is like checking your playground for those hidden barriers — except instead of a playground, it’s a website or app.

Some people browse the web without seeing the screen. They use a tool called a screen reader that reads everything out loud. If your website has a picture with no description, the screen reader just says “image” — completely useless.

Some people can’t use a mouse, so they navigate entirely with their keyboard. If a button only works when clicked with a mouse, those people are stuck.

Python has tools that act like robot inspectors. They crawl through your website and check: Does every image have a description? Can you reach every button with just the keyboard? Is the text big enough? Do the colors have enough contrast so people with low vision can read them?

These tools follow rules called WCAG (Web Content Accessibility Guidelines) — like building codes, but for websites.

When the robot inspector finds problems, it tells you exactly what’s wrong and where, so you can fix it. It’s faster and more reliable than checking every page by hand.

The one thing to remember: Accessibility testing uses automated tools to find barriers that prevent people with disabilities from using your website — and Python makes it easy to run these checks.