Zoom.us Video Conferencing, Web Conferencing, Webinars, Screen Sharing - Zoom
Zoom is the leader in modern enterprise video communications, with an easy, reliable cloud platform for video and audio conferencing, chat, and webina...
zoom.us Desktop Performance
49/100
These metrics represent real-world Chrome users experience viewing zoom.us 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
First Contentful Paint
First Input Delay
Cumulative Layout Shift
Metrics
Largest Contentful Paint31/100 3.2 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn More
Time to Interactive37/100 5.3 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more.
Total Blocking Time39/100 420 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more.
Speed Index56/100 2.1 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more.
First Contentful Paint84/100 1.1 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more.
Cumulative Layout Shift100/100 0.018
Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more.
Should Fix (20)
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 2,490 KiB
1,790 ms
Remove unused JavaScript
Potential savings of 572 KiB
1,430 ms
Defer offscreen images
Potential savings of 2,050 KiB
1,320 ms
Efficiently encode images
Potential savings of 901 KiB
750 ms
Eliminate render-blocking resources
Potential savings of 230 ms
230 ms
Properly size images
Potential savings of 109 KiB
120 ms
Enable text compression
Potential savings of 3 KiB
80 ms
Minify JavaScript
Potential savings of 4 KiB
70 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
106 resources found
Ensure text remains visible during webfont load
Reduce the impact of third-party code
Third-party code blocked the main thread for 650 ms
Avoid enormous network payloads
Total size was 5,597 KiB
Avoid an excessive DOM size
1,551 elements
Minimize main-thread work
3.3 s
Reduce JavaScript execution time
2.4 s
Largest Contentful Paint element
1 element found
Keep request counts low and transfer sizes small
146 requests • 5,597 KiB
Avoid large layout shifts
4 elements found
Avoid chaining critical requests
27 chains found
Avoid long main-thread tasks
14 long tasks found
Passed Audits (9)
Avoids `document.write()`
Remove unused CSS
Potential savings of 109 KiB
Initial server response time was short
Root document took 370 ms
Avoid multiple page redirects
Potential savings of 190 ms
Minify CSS
Potential savings of 16 KiB
Uses passive listeners to improve scrolling performance
Use video formats for animated content
Preconnect to required origins
Preload key requests
zoom.us 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.
Links do not have descriptive text
9 links found
Image elements do not have `[alt]` attributes
Passed Audits (10)
robots.txt is valid
Page isn’t blocked from indexing
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
Document has a valid `hreflang`
Document has a valid `rel=canonical`
Document has a meta description
Page has successful HTTP status code
Links are crawlable
Document has a `<title>` element
Document avoids plugins
zoom.us Desktop Best Practices
69/100
These checks highlight opportunities to improve the overall code health of zoom.us 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 (4)
General
Uses deprecated APIs
1 warning found
Trust and Safety
Links to cross-origin destinations are unsafe
Does not use HTTPS
1 insecure request found
Includes front-end JavaScript libraries with known security vulnerabilities
4 vulnerabilities detected
Passed Audits (10)
Page has the HTML doctype
Properly defines charset
Serves images with appropriate resolution
Allows users to paste into password fields
No browser errors logged to the console
Avoids Application Cache
Avoids requesting the notification permission on page load
Displays images with correct aspect ratio
Avoids requesting the geolocation permission on page load
Detected JavaScript libraries
zoom.us Desktop Progressive Web App
19/100
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 (10)
PWA Optimized
Manifest doesn't have a maskable icon
Is not configured for a custom splash screen
Does not set a theme color for the address bar.
Does not provide a valid `apple-touch-icon`
Fast and reliable
Page load is not fast enough on mobile networks
Interactive on simulated mobile network at 27.6 s
`start_url` does not respond with a 200 when offline
Current page does not respond with a 200 when offline
Installable
Does not register a service worker that controls page and `start_url`
Does not use HTTPS
1 insecure request found
Web app manifest does not meet the installability requirements
Passed Audits (3)
Contains some content when JavaScript is not available
Redirects HTTP traffic to HTTPS
Has a `<meta name="viewport">` tag with `width` or `initial-scale`
zoom.us Desktop Accessibility
75/100
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)
Contrast
These are opportunities to improve the legibility of your content.
Background and foreground colors do not have a sufficient contrast ratio.
Tables and lists
These are opportunities to to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
List items (`<li>`) are not contained within `<ul>` or `<ol>` parent elements.
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.
Image elements do not have `[alt]` attributes
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 IDs are not unique
`[role]`s are not contained by their required parent element
Navigation
These are opportunities to improve keyboard navigation in your application.
Heading elements are not in a sequentially-descending order
`[id]` attributes on active, focusable elements are not unique
Passed Audits (21)
`<html>` element has a valid value for its `[lang]` attribute
Links have a discernible name
`[aria-*]` attributes have valid values
`[accesskey]` values are unique
`[aria-*]` attributes match their roles
Presentational `<table>` elements avoid using `<th>`, `<caption>` or the `[summary]` attribute.
No element has a `[tabindex]` value greater than 0
`<html>` element has a `[lang]` attribute
`[aria-hidden="true"]` is not present on the document `<body>`
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
ARIA input fields have accessible names
Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
The page contains a heading, skip link, or landmark region
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[aria-hidden="true"]` elements do not contain focusable descendents
Document has a `<title>` element
`[role]` values are valid
Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
`[aria-*]` attributes are valid and not misspelled
Buttons have an accessible name
`[role]`s have all required `[aria-*]` attributes
Desktop Speed
29/100
These checks analyze the performance of zoom.us 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 (4)
Optimize images
Enable compression
Leverage browser caching
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Passed Audits (6)
Avoid landing page redirects
Reduce server response time
Minify CSS
Minify HTML
Minify JavaScript
Prioritize visible content
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