51h5.online
51h5.online Desktop Performance
77/100
These metrics represent real-world Chrome users experience viewing 51h5.online 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
Cumulative Layout Shift
First Contentful Paint
First Input Delay
Largest Contentful Paint
Metrics
Cumulative Layout Shift3/100 0.926
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Largest Contentful Paint68/100 1.9 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more
Total Blocking Time72/100 240 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Time to Interactive87/100 2.7 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Speed Index93/100 1.2 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint100/100 0.4 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Should Fix (14)
Opportunities
These suggestions can help your page load faster. They don't directly affect the Performance score.
Serve images in next-gen formats
Potential savings of 313 KiB
210 ms
Remove unused JavaScript
Potential savings of 117 KiB
200 ms
Properly size images
Potential savings of 193 KiB
120 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
Image elements do not have explicit `width` and `height`
Avoid `document.write()`
Minimize main-thread work
2.3 s
Reduce JavaScript execution time
1.4 s
Uses efficient cache policy on static assets
19 resources found
Avoid long main-thread tasks
9 long tasks found
Avoid large layout shifts
5 elements found
Avoid chaining critical requests
1 chain found
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
196 requests • 1,880 KiB
Passed Audits (19)
Initial server response time was short
Root document took 220 ms
Use video formats for animated content
Uses passive listeners to improve scrolling performance
Avoid multiple page redirects
Potential savings of 190 ms
Remove duplicate modules in JavaScript bundles
Preconnect to required origins
Preload Largest Contentful Paint image
Avoids enormous network payloads
Total size was 1,880 KiB
Avoids an excessive DOM size
561 elements
Remove unused CSS
Minify CSS
Minify JavaScript
Avoid serving legacy JavaScript to modern browsers
Eliminate render-blocking resources
Minimize third-party usage
Third-party code blocked the main thread for 220 ms
Efficiently encode images
Potential savings of 31 KiB
Preload key requests
Enable text compression
Defer offscreen images
51h5.online 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
Document does not have a valid `rel=canonical`
Passed Audits (10)
Links are crawlable
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document avoids plugins
Document has a valid `hreflang`
Document has a meta description
Document has a `<title>` element
Links have descriptive text
robots.txt is valid
Page isn’t blocked from indexing
Page has successful HTTP status code
51h5.online Desktop Best Practices
60/100
These checks highlight opportunities to improve the overall code health of 51h5.online 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 (6)
Trust and Safety
Includes front-end JavaScript libraries with known security vulnerabilities
6 vulnerabilities detected
Does not use HTTPS
1 insecure request found
Links to cross-origin destinations are unsafe
General
Registers an `unload` listener
User Experience
Displays images with incorrect aspect ratio
Serves images with low resolution
Passed Audits (11)
Avoids Application Cache
Page has the HTML doctype
No issues in the `Issues` panel in Chrome Devtools
Avoids requesting the notification permission on page load
Detected JavaScript libraries
No browser errors logged to the console
Page has valid source maps
Properly defines charset
Avoids deprecated APIs
Avoids requesting the geolocation permission on page load
Allows users to paste into password fields
51h5.online Desktop Progressive Web App
73/100
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 (3)
PWA Optimized
Does not set a theme color for the address bar.
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Passed Audits (5)
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Web app manifest and service worker meet the installability requirements
Redirects HTTP traffic to HTTPS
Provides a valid `apple-touch-icon`
Registers a service worker that controls page and `start_url`
51h5.online Desktop Accessibility
64/100
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 (7)
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
`<html>` element does not have a `[lang]` attribute
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
Image elements do not have `[alt]` attributes
Links do not have a discernible name
Navigation
These are opportunities to improve keyboard navigation in your application.
The page does not contain a heading, skip link, or landmark region
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.
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Passed Audits (9)
`[id]` attributes on active, focusable elements are unique
`[aria-hidden="true"]` elements do not contain focusable descendents
`[aria-*]` attributes match their roles
Document has a `<title>` element
No element has a `[tabindex]` value greater than 0
`[aria-*]` attributes are valid and not misspelled
`[aria-hidden="true"]` is not present on the document `<body>`
Buttons have an accessible name
`[aria-*]` attributes have valid values
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