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krefel.be Desktop Performance
18/100
These metrics represent real-world Chrome users experience viewing krefel.be web page. Reports are focused on loading performance and other critical factors that most affect user experience. Follow our guide to track, optimize, and improve the quality of your web pages.
User Loading Experience
First Contentful Paint
First Input Delay
Cumulative Layout Shift
Largest Contentful Paint
Metrics
Total Blocking Time8/100 890 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Speed Index10/100 4.0 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint15/100 2.5 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift19/100 0.465
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Largest Contentful Paint20/100 3.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive40/100 5.0 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Should Fix (20)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Remove unused JavaScript
Potential savings of 1,078 KiB
1,310 ms
Reduce initial server response time
Root document took 1,870 ms
1,275 ms
Serve images in next-gen formats
Potential savings of 753 KiB
540 ms
Defer offscreen images
Potential savings of 317 KiB
200 ms
Minify JavaScript
Potential savings of 77 KiB
120 ms
Properly size images
Potential savings of 127 KiB
120 ms
Remove unused CSS
Potential savings of 170 KiB
120 ms
Efficiently encode images
Potential savings of 115 KiB
80 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Ensure text remains visible during webfont load
Does not use passive listeners to improve scrolling performance
Avoid an excessive DOM size
3,106 elements
Serve static assets with an efficient cache policy
37 resources found
Avoid enormous network payloads
Total size was 4,126 KiB
Minimize main-thread work
4.1 s
Reduce JavaScript execution time
2.5 s
Avoid large layout shifts
5 elements found
Keep request counts low and transfer sizes small
93 requests • 4,126 KiB
Avoid long main-thread tasks
9 long tasks found
Largest Contentful Paint element
1 element found
Avoid chaining critical requests
8 chains found
Passed Audits (9)
Preconnect to required origins
Minimize third-party usage
Third-party code blocked the main thread for 80 ms
Enable text compression
Preload key requests
Avoid multiple page redirects
Potential savings of 190 ms
Use video formats for animated content
Avoids `document.write()`
Minify CSS
Eliminate render-blocking resources
Potential savings of 40 ms
krefel.be Desktop SEO
83/100
These checks ensure that your page is optimized for search engine results ranking. There are additional factors Lighthouse does not check that may affect your search ranking. Learn more. Run these additional validators on your site to check additional SEO best practices.
Should Fix (2)
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Image elements do not have `[alt]` attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Passed Audits (10)
Document has a valid `rel=canonical`
Document avoids plugins
Document has a valid `hreflang`
robots.txt is valid
Page has successful HTTP status code
Page isn’t blocked from indexing
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document has a meta description
Links have descriptive text
Document has a `<title>` element
krefel.be Desktop Best Practices
77/100
These checks highlight opportunities to improve the overall code health of krefel.be page. Current recommendations will help to make your page fast and secure, to create a good user experience and to avoid deprecated technologies.
Should Fix (3)
Trust and Safety
Includes front-end JavaScript libraries with known security vulnerabilities
3 vulnerabilities detected
Does not use HTTPS
1 insecure request found
General
Browser errors were logged to the console
Passed Audits (11)
Allows users to paste into password fields
Properly defines charset
Avoids deprecated APIs
Avoids Application Cache
Displays images with correct aspect ratio
Avoids requesting the notification permission on page load
Avoids requesting the geolocation permission on page load
Detected JavaScript libraries
Serves images with appropriate resolution
Page has the HTML doctype
Links to cross-origin destinations are safe
krefel.be Desktop Progressive Web App
30/100
These checks validate the aspects of a Progressive Web App. Learn more. These checks are required by the baseline PWA Checklist but are not automatically checked by Lighthouse. They do not affect your score but it's important that you verify them manually.
Should Fix (8)
Installable
Does not register a service worker that controls page and `start_url`
Does not use HTTPS
1 insecure request found
PWA Optimized
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Does not provide a valid `apple-touch-icon`
Fast and reliable
`start_url` does not respond with a 200 when offline
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 25.1 s
Current page does not respond with a 200 when offline
Passed Audits (5)
Web app manifest meets the installability requirements
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
Sets a theme color for the address bar.
krefel.be Desktop Accessibility
67/100
These checks highlight opportunities to improve the accessibility of your web app. Only a subset of accessibility issues can be automatically detected so manual testing is also encouraged. These items address areas which an automated testing tool cannot cover. Learn more in our guide on conducting an accessibility review.
Should Fix (8)
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Form elements do not have associated labels
Image elements do not have `[alt]` attributes
Buttons do not have an accessible name
Links do not have a discernible name
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
ARIA input fields do not have accessible names
Best practices
These items highlight common accessibility best practices.
`[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5.
Tables and lists
These are opportunities to to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Lists do not contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (17)
`[aria-*]` attributes are valid and not misspelled
`[aria-hidden="true"]` is not present on the document `<body>`
`[role]` values are valid
No element has a `[tabindex]` value greater than 0
`<html>` element has a `[lang]` attribute
`[aria-*]` attributes have valid values
`[id]` attributes on active, focusable elements are unique
`[aria-*]` attributes match their roles
`[role]`s are contained by their required parent element
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
`<html>` element has a valid value for its `[lang]` attribute
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
`[aria-hidden="true"]` elements do not contain focusable descendents
The page contains a heading, skip link, or landmark region
`[role]`s have all required `[aria-*]` attributes
Heading elements appear in a sequentially-descending order
Document has a `<title>` element
Desktop Speed
52/100
These checks analyze the performance of krefel.be on desktop devices and return PageSpeed score and information on how to improve the load time. What makes a good Progressive Web App?
Should Fix (9)
Leverage browser caching
Optimize images
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Avoid landing page redirects
Enable compression
Prioritize visible content
Minify JavaScript
Minify CSS
Minify HTML
Passed Audits (1)
Reduce server response time
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