Accessibility Checker — can everyone use your page?
An accessible page can be used by everyone — including people who rely on screen readers, keyboards or high contrast. This check looks at accessibility basics: image alt text, form labels, colour contrast, a logical heading structure, and keyboard usability. Beyond being the right thing to do (and often a legal requirement), accessible markup tends to be the clean, semantic HTML that search and AI engines parse best.
Updated June 2026 · Technical SEO & GEO · Part of Security & HTML Quality
Check your accessibility basics
Paste a URL — GEObubbly checks your page against core accessibility basics like alt text, labels and contrast.
✓ Free check✓ 1 signal✓ No signup required
In short: Core accessibility — a declared language, image alt text, form labels, sufficient contrast and semantic structure — makes the page usable for everyone and, not coincidentally, far more machine-readable for search and AI engines.
What does the accessibility check look for?
It checks a set of foundational accessibility signals that affect a wide range of users. Specifically:
Alt text — images have descriptive alternative text for screen-reader users.
Form labels — inputs have associated labels so their purpose is clear.
Colour contrast — text has sufficient contrast against its background to be readable.
Headings & landmarks — a logical heading structure and semantic landmarks for navigation.
Keyboard use — interactive elements are reachable and operable by keyboard.
Strong on the basics passes; some issues is a warning; significant accessibility barriers is a fail.
How is it evaluated, and how is it scored?
GEObubbly checks the page against core accessibility basics like alt text, labels, contrast and heading structure. It's a core, scored Security & HTML Quality check that runs directly against the page's markup.
Why accessibility matters for SEO and GEO
Accessibility means building pages that everyone can use, including people who navigate with a screen reader, use a keyboard instead of a mouse, or need high contrast and larger text. The basics — descriptive alt text on images, labels on form fields, sufficient colour contrast, a logical heading structure, and keyboard-operable controls — cover a large share of real-world barriers. There are three reasons this belongs in an SEO/GEO audit. First, it's the right thing to do and, in many jurisdictions, a legal requirement. Second, accessible markup overlaps heavily with the clean, semantic HTML that engines parse best: alt text gives engines image context, a proper heading hierarchy describes structure, and semantic landmarks help both assistive tech and crawlers understand the page. Third, accessible pages tend to be better-built pages overall, which correlates with the quality signals engines reward. For GEO, the same structure that helps a screen reader extract meaning helps an AI engine extract and cite content.
How this check scores
Pass:Solid baseline: language declared, alt text present, controls labelled, semantic structure, adequate contrast.
Warning:Mostly accessible with a few gaps (e.g. some missing labels or low-contrast text).
Fail:Multiple fundamentals missing — the page is hard for assistive tech and parsers alike.
FAQ
The foundational accessibility basics include: descriptive alt text on images so screen-reader users know what they show; labels on form fields so their purpose is clear; sufficient colour contrast between text and background for readability; a logical heading structure (one H1, nested H2s and H3s) that conveys the page's outline; semantic landmarks like header, nav and main for orientation; and ensuring all interactive elements can be reached and operated with a keyboard. These cover a large share of real-world barriers and are the starting point of the WCAG guidelines that define accessible web content.