WEB - GAME - APP Ontwikkelaar | DTT - Amsterdam

What Dr Urls found on d-tt.nl

From the audit of their public home page on 21/10/2026, worst first. Each links to what it means and how it is fixed.

• high
  Horizontal scrolling likely on mobile

  Horizontal scrolling is a top mobile usability failure that Google actively penalizes in mobile search rankings.

• high
  Links implemented with JavaScript only

  While Google can execute JavaScript, it does not always follow JavaScript-based navigation.

• high
  Missing landmark elements

  WCAG 1.3.1 requires that page structure is programmatically determinable.

• high
  Time to First Byte (TTFB) is slow

  TTFB directly impacts all subsequent loading metrics.

• high
  Too many HTTP requests per page

  Each HTTP request incurs overhead from DNS lookup, TCP connection, TLS handshake, and server processing.

• medium
  Above-fold images not prioritized

  The Largest Contentful Paint (LCP) element is often a hero image.

• medium
  Cache-Control header missing

  Proper caching prevents browsers from re-downloading unchanged resources, dramatically improving repeat visit performance.

• medium
  Focus indicators removed or hidden

  Focus indicators are essential for keyboard navigation.

• medium
  Form inputs missing associated labels

  Unlabelled form fields are unusable for screen reader users, who represent a significant portion of potential customers.

• medium
  Image file too large (>500 KB)

  Images typically account for 50-75% of a page's total weight.

• medium
  Image missing alt attribute

  Image alt text is the primary way search engines understand image content.

• medium
  Images missing width and height attributes

  Missing image dimensions are the leading cause of Cumulative Layout Shift (CLS), a Core Web Vital and ranking factor.

And 15 more. 3 security findings are not listed on this public page; the site's owner sees them in a full audit after claiming it.