Website Accessibility Maintenance: Why Accessible Sites Don't Stay That Way

A website that launches accessible will not stay accessible on its own. Every new image, blog post, PDF, form, popup, and embedded tool is a chance to introduce a barrier, so accessibility has to be maintained, not certified once and forgotten. The fastest way to protect it is a short check before you publish any update, plus periodic professional review of the parts you did not build yourself.

Why does an accessible website become inaccessible?

An accessible website becomes inaccessible because its content keeps changing after launch. The original build can meet WCAG 2.2 Level AA, but the everyday updates that keep a site useful each bring their own markup, and that markup is where new barriers appear. A pasted-in section, a new hero image, a quick PDF upload, a third-party booking widget: none of these inherit the accessibility of the pages around them. Conformance describes the current state of your content, not a permanent stamp on the site.

What accessibility issues show up most often after launch?

The most common post-launch barriers come from routine content edits, and they repeat across almost every site. The usual culprits are:

• Missing or unhelpful alternative text on newly added images
• Vague link text such as "click here" or "read more" that does not describe its destination
• Broken heading order when a section is pasted in from a document
• Untagged, unreadable PDFs and other documents
• Low color contrast in new brand elements, badges, or buttons
• Keyboard barriers inside popups, sliders, and embedded forms
• Third-party tools and Apps that cannot be operated by keyboard or a screen reader

In our monthly maintenance work, the two we catch most often are missing alt text on CMS images and heading order that breaks when someone pastes a section straight from a Google Doc. Both are invisible on screen and both are easy to fix once you know to look.

What about third-party tools and Apps you cannot edit?

Embedded third-party tools are the one category your developer often cannot fix. When you add a booking widget, a chat tool, a map, or a social feed, that code loads from someone else's servers, and it frequently arrives with accessibility barriers already built in and no way for us to reach the markup and correct them. If you choose to use one, the responsible step is to have it audited for accessibility first, then decide whether it is worth keeping.

That decision needs real information. If a booking widget has a keyboard barrier that makes it impossible for some people to schedule a meeting, an accessibility professional can confirm the problem and tell you whether to keep the tool or move to a booking platform that does not have the barrier. Some tools are close. Google Maps, for example, is mostly accessible but can carry small issues. In that case an expert can document the known limitation as a line item on your accessibility statement, which protects you and tells your audience exactly what to expect. Having an accessibility professional on your team is what keeps you informed enough to make these calls instead of guessing.

How often should you check website accessibility?

Check accessibility every time you publish new content, and schedule a fuller professional review on a recurring basis, monthly for sites that update often. The per-update check catches the obvious regressions before they reach visitors. The recurring review catches what routine updates, App changes, and third-party integrations introduce quietly over time, the issues a quick glance will not surface.

A five-minute accessibility check before you publish

Before you publish any new content, spend five minutes confirming six things: images, headings, links, media, documents, and keyboard use.

1. Images: every meaningful image has alt text that describes what it shows, and purely decorative images are marked as decorative so screen readers skip them.
2. Headings: there is one H1, and the heading levels step down one at a time (H2, then H3) without skipping.
3. Links: the link text describes where it goes, so it makes sense read on its own, out of context.
4. Media: videos have accurate captions and audio content has a descriptive text transcript.
5. Documents: PDFs are tagged and readable, or you offer the same information as an accessible web page.
6. Keyboard: you can reach and operate every new element (buttons, sliders, popups, forms) using the Tab and Enter keys alone, and you can always see which element has focus.

If any one of those fails, fix it before the content goes live. Catching it at publish time takes minutes; finding it months later, after visitors have hit it, takes a full review.

Real talk: a checklist will not catch everything

A pre-publish check catches the common regressions, but it will not catch everything, and pretending otherwise does you no favors. Screen reader output, focus management inside custom components, and the real usability of embedded third-party tools need manual testing by someone who does it regularly. Automated scanners flag only a portion of accessibility issues and miss most of the ones that actually block people. That gap is the honest reason ongoing oversight exists. A five-minute check keeps a good site from slipping; it does not replace expert testing when something new and complex goes in.

Keep your site accessible after launch

Keeping a site accessible after launch is exactly what ongoing maintenance is for. Our monthly website support and maintenance plans include accessibility upkeep on every update, so new content does not quietly undo the work. If barriers have already built up, our Webflow accessibility remediation fixes them at the root through manual testing, not an overlay. We do this every week for businesses across Yakima and the wider valley. If you are newer to this, start with our introductory guide to Webflow accessibility and the accessibility testing tools we actually use. When you are ready, request a free quote and we will tell you what your site needs.

Frequently asked questions

Does website accessibility need to be maintained?

Yes. Accessibility reflects the current state of your content, so it changes every time you add or edit something. Maintaining it means checking new content as you publish and reviewing the whole site on a schedule, rather than treating the launch as a finish line.

Why did my accessible website become inaccessible?

Almost always because of content added after launch. New images without alt text, pasted sections that break heading order, untagged PDFs, and embedded tools that are not keyboard operable each add barriers the original build did not have.

Are embedded third-party tools and Apps accessible by default?

Often not. Booking widgets, chat tools, maps, and social feeds load code you cannot edit, and many ship with barriers your developer cannot remove. Before you rely on one, have it audited so you know whether to keep it, replace it, or note its known limitation on your accessibility statement.

Can automated accessibility tools keep my site conformant?

Not on their own. Automated tools catch only part of the WCAG picture and are useful for a first pass. Keyboard operation, screen reader output, and focus order all need manual testing by a person to confirm the site actually works for the people using assistive technology.

What is the difference between accessibility remediation and accessibility maintenance?

Remediation fixes existing barriers on a site that is already out of conformance. Maintenance keeps a conformant site from slipping as new content and tools are added. Many businesses need remediation once, then maintenance ongoing to protect the result.

Written by Crystal Scott, Certified Professional in Web Accessibility (CPWA) and Certified Webflow Expert, with more than 11 years in front-end web development.