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Web health
66/100
measured 22/10/2026
Issues found
22
on their own site
Reviews
0
from clients on Dr Urls
What Dr Urls found on sdim.nl
From the audit of their public home page on 22/10/2026, worst first. Each links to what it means and how it is fixed.
- highLinks implemented with JavaScript only
While Google can execute JavaScript, it does not always follow JavaScript-based navigation.
- mediumCache-Control header missing
Proper caching prevents browsers from re-downloading unchanged resources, dramatically improving repeat visit performance.
- mediumDuplicate ID attributes found
Duplicate IDs cause label elements, aria-labelledby, aria-describedby, and fragment link targets to associate with the wrong element.
- mediumExcessive DOM size
A large DOM tree directly impacts Interaction to Next Paint (INP), a Core Web Vital.
- mediumForm inputs missing associated labels
Unlabelled form fields are unusable for screen reader users, who represent a significant portion of potential customers.
- mediumForm inputs missing autocomplete attribute
WCAG 1.3.5 requires input purpose to be programmatically determined for inputs collecting user information.
- mediumIcon-only button missing aria-label
Icon-only buttons are extremely common in modern UIs (hamburger menus, close buttons, search icons), but without aria-labels, they are completely opaque to screen reader users.
- mediumImage file too large (>500 KB)
Images typically account for 50-75% of a page's total weight.
- mediumImages missing width and height attributes
Missing image dimensions are the leading cause of Cumulative Layout Shift (CLS), a Core Web Vital and ranking factor.
- mediumScripts without async or defer
Synchronous scripts halt HTML parsing while the browser downloads and executes them.
- lowExcessive inline CSS
Inline CSS cannot be cached separately by the browser, so it is re-downloaded with every page load.
- lowExcessive inline JavaScript
Inline JavaScript cannot be cached by the browser and must be parsed and executed every time the page loads.
And 5 more. 3 security findings are not listed on this public page; the site's owner sees them in a full audit after claiming it.
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Figures on this page come from Dr Urls crawling sdim.nl's public pages. Nothing here is taken from third-party listings.