Duden.de Duden | Startseite
duden.de Desktop Performance
71/100
These metrics represent real-world Chrome users experience viewing duden.de 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
Largest Contentful Paint
Cumulative Layout Shift
First Contentful Paint
First Input Delay
Metrics
Speed Index12/100 3.8 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint54/100 1.5 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Largest Contentful Paint64/100 2.0 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive99/100 1.5 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Total Blocking Time100/100 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Cumulative Layout Shift100/100 0.004
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (12)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Avoid multiple page redirects
Potential savings of 340 ms
340 ms
Reduce initial server response time
Root document took 930 ms
328 ms
Eliminate render-blocking resources
Potential savings of 230 ms
228 ms
Remove unused JavaScript
Potential savings of 161 KiB
190 ms
Enable text compression
Potential savings of 125 KiB
160 ms
Diagnostics
More information about the performance of your application. These numbers don't directly affect the Performance score.
Serve static assets with an efficient cache policy
6 resources found
Avoid an excessive DOM size
862 elements
Keep request counts low and transfer sizes small
138 requests • 1,285 KiB
Avoid large layout shifts
5 elements found
Avoid chaining critical requests
53 chains found
Largest Contentful Paint element
1 element found
Avoid long main-thread tasks
1 long task found
Passed Audits (17)
All text remains visible during webfont loads
Efficiently encode images
Minify CSS
Serve images in next-gen formats
JavaScript execution time
0.3 s
Minimize third-party usage
Third-party code blocked the main thread for 0 ms
Avoids `document.write()`
Preconnect to required origins
Use video formats for animated content
Uses passive listeners to improve scrolling performance
Properly size images
Defer offscreen images
Remove unused CSS
Minify JavaScript
Potential savings of 7 KiB
Avoids enormous network payloads
Total size was 1,285 KiB
Preload key requests
Minimizes main-thread work
1.3 s
duden.de 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)
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Links are not crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Document does not have a meta description
Passed Audits (10)
Document has a valid `hreflang`
robots.txt is valid
Page isn’t blocked from indexing
Document has a valid `rel=canonical`
Page has successful HTTP status code
Image elements have `[alt]` attributes
Document avoids plugins
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Links have descriptive text
Document has a `<title>` element
duden.de Desktop Best Practices
77/100
These checks highlight opportunities to improve the overall code health of duden.de 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)
General
Browser errors were logged to the console
Trust and Safety
Does not use HTTPS
1 insecure request found
Links to cross-origin destinations are unsafe
Passed Audits (11)
Properly defines charset
Allows users to paste into password fields
Avoids deprecated APIs
Detected JavaScript libraries
Page has the HTML doctype
Displays images with correct aspect ratio
Avoids requesting the geolocation permission on page load
Avoids front-end JavaScript libraries with known security vulnerabilities
Serves images with appropriate resolution
Avoids requesting the notification permission on page load
Avoids Application Cache
duden.de Desktop Progressive Web App
22/100
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 (9)
Fast and reliable
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 12.4 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Installable
Web app manifest does not meet the installability requirements
Does not use HTTPS
1 insecure request found
Does not register a service worker that controls page and `start_url`
PWA Optimized
Is not configured for a custom splash screen
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Passed Audits (4)
Provides a valid `apple-touch-icon`
Contains some content when JavaScript is not available
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Redirects HTTP traffic to HTTPS
duden.de Desktop Accessibility
91/100
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 (3)
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.
`<frame>` or `<iframe>` elements do not have a title
Form elements do not have associated labels
Links do not have a discernible name
Passed Audits (24)
Heading elements appear in a sequentially-descending order
`[aria-hidden="true"]` is not present on the document `<body>`
`[aria-*]` attributes match their roles
`[aria-*]` attributes have valid values
`<html>` element has a `[lang]` attribute
Buttons have an accessible name
`[lang]` attributes have a valid value
List items (`<li>`) are contained within `<ul>` or `<ol>` parent elements
Image elements have `[alt]` attributes
`<html>` element has a valid value for its `[lang]` attribute
`[aria-*]` attributes are valid and not misspelled
ARIA IDs are unique
Document has a `<title>` element
`[id]` attributes on active, focusable elements are unique
The page contains a heading, skip link, or landmark region
`[aria-hidden="true"]` elements do not contain focusable descendents
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
`[role]`s are contained by their required parent element
`[role]` values are valid
`[role]`s have all required `[aria-*]` attributes
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
Background and foreground colors have a sufficient contrast ratio
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
No element has a `[tabindex]` value greater than 0
Desktop Speed
82/100
These checks analyze the performance of duden.de 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 (6)
Avoid landing page redirects
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Leverage browser caching
Enable compression
Minify JavaScript
Optimize images
Passed Audits (4)
Reduce server response time
Minify CSS
Minify HTML
Prioritize visible content
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