Performance and Accessibility (WCAG) for modern websites

We improve Lighthouse metrics (Core Web Vitals) and ensure compliance with WCAG 2.2 AA – for faster loading, better UX, higher implementation and wider audience.

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Why it matters

Faster pages

We optimize LCP, INP and CLS for faster first image, more reactive interfaces and stable layouts.

Wider accessibility

Compliance with WCAG 2.2 AA, correct ARIA roles and semantic structures – accessible for everyone, including with assistive technologies.

Better indexing

Семантичен HTML, структурирани данни и ясна информационна архитектура – готови за търсачки и AI системи за отговори.

What the service includes

Performance audit

  • Measurement of Core Web Vitals: LCP, INP, CLS (real and lab data).
  • Landing chain (waterfall), critical CSS, blocking resources.
  • Analysis of images (formats AVIF/WebP, sizes, lazy-loading).
  • JS budget, tree-shaking/code-splitting, defer/async, preloading & preconnect.
  • Fonts: font-display, subsetting, preloading, system alternatives.
  • Кеширане/CDN, HTTP/2+/3, компресия (Brotli), server timing.

Accessibility audit (WCAG 2.2 AA)

  • Семантични елементи и ARIA роли (landmarks: header, nav, main, aside, footer).
  • Focus and keyboard navigation, „skip to content“ link.
  • Contrasts, scaling, visible focus indicators.
  • Headings and labels (label, aria-label, aria-labelledby), descriptions (aria-describedby).
  • Dynamic states: aria-expanded, aria-live, valid roles.
  • Multimedia: subtitles, transcriptions, alternative text.

Implementation of improvements

  • Removal/optimization of heavy scripts, optimization of rendering.
  • Extraction of critical CSS, modular CSS, reduction of unused CSS.
  • Lazy/hybrid rendering (SSR/SSG/ISR), edge caching.
  • Optimized images and font pipelines.
  • Improvements to navigation and focus-order, ARIA annotations.

Continuous monitoring & training

  • CI/CD checks (Lighthouse CI, axe-core), regression thresholds.
  • Real data (RUM) and alerts on metric drops.
  • Training of the team: guidelines for coding, content and design.
  • Reporting and roadmap with priorities (high/medium/low).

ARIA and semantics: quick checklist

  • Use semantic HTML5 elements before ARIA. ARIA complements, not replaces semantics.
  • Mark main areas with role="banner|navigation|main|complementary|contentinfo" only when needed.
  • Ensure visible and logical focus order; control with tabindex sparingly.
  • Accessible controls for opening/closing: aria-expanded, aria-controls.
  • Dynamic areas with aria-live for messages and errors.
  • Alternative text for images and meaningful link/button titles.

Content markup for better AI indexing

The following elements help search engines and AI systems understand the context, authorship and structural logic of the pages:

Semantics and structure

  • Correct hierarchy of h1–h6 and logical sections (section, article, aside, nav).
  • Descriptive headings and subheadings; tables and lists for facts and comparisons.
  • Internal links and “breadcrumbs” navigation.
  • Language attribute lang and declared encoding.

Structured data (JSON-LD)

  • WebSite, Organization, Service, Product (where applicable).
  • FAQPage, HowTo, Article/BlogPosting for informational content.
  • Clear author, datePublished, about, inLanguage.
  • Canonical URLs, robots, XML sitemap and Open Graph/Twitter meta.

Methodology/Process

  1. 1

    Discovery:

    Target pages, KPIs, current metrics, technologies, limitations.

  2. 2

    Audit:

    Lighthouse, WebPageTest, axe, screen readers (NVDA/VoiceOver), keyboard test.

  3. 3

    Plan:

    Prioritized backlog with effort/impact assessment.

  4. 4

    Implementation:

    Iterative sprints, code review, CI checks.

  5. 5

    Validation:

    Repeat measurements, reports before/after.

  6. 6

    Support:

    Monitoring, training, monthly optimizations.

Our team has over 20 years of experience in developing and optimizing WordPress/PHP/JS systems and complex web applications.