WCAG 2025 – how to implement digital accessibility on your website step by step

Digital accessibility is no longer a niche topic reserved for public institutions. More and more companies and organizations understand that an accessible website is not just a legal obligation, but above all a sign of respect for the user – regardless of their age, ability, technical conditions, or preferences.

The WCAG (Web Content Accessibility Guidelines) standard provides specific guidelines that help create websites that are intuitive, readable, and usable for everyone. In this article, we’ll show you how to approach implementing accessibility on your website in a practical way: from identifying the most common mistakes, through auditing, to working with specialists and testing solutions.

WCAG – not just a legal obligation

The WCAG (Web Content Accessibility Guidelines) are often associated mainly with legal requirements that public institutions must meet. However, digital accessibility is much more than just a formality – it is the foundation of a modern, responsible, and effective online presence.

Applying WCAG principles directly improves user experience – not just for people with disabilities. Well-designed accessibility enhances readability, facilitates navigation, and makes using the site intuitive for everyone: seniors, mobile users, people in a hurry, or those in difficult conditions (e.g., low lighting or slow Internet).

What’s more, accessibility supports SEO efforts. Elements like alternative image descriptions, proper heading structure, and semantic HTML help search engine bots analyze content. The site becomes more visible in search results, increasing its reach without additional advertising costs.

From a business perspective, digital accessibility also means lower legal risk and greater potential to reach a broader audience – including up to 15–20% of the population who may face various limitations when using the Internet. It’s also a component of social responsibility and helps position the company as conscious, modern, and inclusive.

Most common accessibility errors on websites

Although accessibility is becoming more prominent in the awareness of web creators, many mistakes still occur regularly – even on websites of large companies and institutions. Interestingly, most of them result not from bad intentions, but from lack of knowledge or user-perspective testing.

What are the most common accessibility issues?

1. Too low contrast between text and background
   Text with low contrast (e.g., light gray on a white background) is hard to read not only for visually impaired people but also in low light or on mobile screens. WCAG clearly defines minimum contrast ratios that must be met.
2. Missing alternative text for images (alt text)
   Images without descriptions are invisible to screen reader users. This includes photos, icons, infographics, or graphic-based buttons. Every visual element conveying content should have alternative text.
3. Unreadable heading structure and lack of semantics
   Using headings solely for visual purposes (e.g., H1 to enlarge text instead of structuring content) confuses users relying on assistive technologies. Headings should be used logically – H1 as the page title, H2 for sections, H3 for subsections, etc.
4. Incorrectly labeled links and buttons
   Links like “click here” or buttons without labels (e.g., icons only) are unclear outside the visual context. A good link should clearly indicate its destination even when read in isolation.
5. Forms without labels and error messages
   Forms are often inaccessible due to missing field labels, poorly marked required fields, or unclear error messages. Users must know what to enter and how to correct mistakes – also without using a mouse.
6. No keyboard navigation support
   Many interactive elements (e.g., dropdown menus, carousels, popups) don’t function properly without a mouse. Full accessibility means being able to navigate entirely with a keyboard.
7. No focus indicators (visible highlight for active elements)
   Keyboard users should be able to see which element is currently selected. The absence of focus indication can make navigation impossible.
8. Animations and flashing elements without a way to turn them off
   Intense animations, flashing banners, or autoplay videos can be disturbing – or even harmful (e.g., for people with epilepsy). Such content should be pausable.

Implementing WCAG on your website

Accessibility audit

The first step in implementing accessibility is conducting an audit of the existing website. Its goal is to identify areas that don’t comply with WCAG guidelines.

An audit can take the form of:

• automatic – using tools (e.g., axe, WAVE, Lighthouse),
• manual – performed by specialists who check accessibility from a user’s perspective,
• with user involvement – e.g., tests conducted with people with disabilities.

The best results come from combining all methods. The audit report contains a list of issues and recommendations – it serves as the foundation for further work.

Action plan

Based on the audit, it’s worth creating an implementation plan – realistic and tailored to the organization’s resources. A good practice is to divide actions into:

1. critical priorities – barriers that prevent users from accessing the site (e.g., no keyboard support),
2. significant changes – issues that hinder accessibility (e.g., low contrast, missing alt text),
3. improvements – elements worth improving, though not strictly required by WCAG.

The plan should include deadlines, responsible persons, and verification methods. It’s also essential to assume that accessibility is not a one-time project but an ongoing process.

Collaboration with specialists

Implementing accessibility requires teamwork. Depending on the project’s scale, involved parties may include:

• frontend developers – apply fixes in code (HTML, CSS, ARIA),
• UI/UX designers – adapt interface design and logic,
• accessibility specialists – support the entire audit and implementation process,
• QA/testers – verify results from different perspectives, including screen reader use.

It’s also worth appointing someone to coordinate efforts – this way, accessibility gains the status of a defined project with a clear structure.

Accessibility testing tools

During the process, it’s useful to use tools that support ongoing accessibility evaluation. Here are some of the most commonly used:

• axe DevTools (Chrome/Firefox) – automatic accessibility testing for any page,
• WAVE – visual identification of accessibility issues (online or as a plugin),
• Lighthouse – Google’s tool evaluating accessibility and performance,

Testing should be an integral part of website development and updates – not just a one-time action after an audit.

Summary

Digital accessibility is not a one-off project that can be “checked off” a to-do list. It’s a process – requiring commitment, awareness, and team collaboration. However, the effort put into building an accessible website pays off many times over: with better UX, improved SEO, wider reach, and a positive brand image.

By implementing WCAG, you invest not only in legal compliance but – more importantly – in the quality of communication with your audience. And quality is what builds trust, loyalty, and online effectiveness.