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caltech.zoom.us screenshot

Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

caltech.zoom.us

Video Conferencing, Web Conferencing, Online Meetings, Screen Sharing - Zoom

Page Load Speed

780 ms in total

First Response

55 ms

Resources Loaded

494 ms

Page Rendered

231 ms

caltech.zoom.us screenshot

About Website

Click here to check amazing Caltech Zoom content for United States. Otherwise, check out these important facts you probably never knew about caltech.zoom.us

Zoom unifies cloud video conferencing, simple online meetings, and cross platform group chat into one easy-to-use platform. Our solution offers the best video, audio, and screen-sharing experience acr...

Visit caltech.zoom.us

Key Findings

We analyzed Caltech.zoom.us page load time and found that the first response time was 55 ms and then it took 725 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

caltech.zoom.us performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.1 s

99/100

10%

LCP (Largest Contentful Paint)

Value1.1 s

100/100

25%

SI (Speed Index)

Value1.1 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.1 s

100/100

10%

Network Requests Diagram

caltech.zoom.us

55 ms

caltech.zoom.us

121 ms

07b574b7-2236-4fd3-b135-0f7e209e12b5.png

318 ms

caltech-new-logo.png

51 ms

Our browser made a total of 4 requests to load all elements on the main page. We found that 50% of them (2 requests) were addressed to the original Caltech.zoom.us, 25% (1 request) were made to Us02web.zoom.us and 25% (1 request) were made to Caltech.edu. The less responsive or slowest element that took the longest time to load (318 ms) relates to the external source Us02web.zoom.us.

Page Optimization Overview & Recommendations

Page size can be reduced by 169.4 kB (9%)

Content Size

2.0 MB

After Optimization

1.8 MB

  • HTML
  • Images

In fact, the total size of Caltech.zoom.us main page is 2.0 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 5% of websites need less resources to load. Images take 2.0 MB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 4.9 kB

  • Original 6.8 kB
  • After minification 6.2 kB
  • After compression 1.9 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 4.9 kB or 72% of the original size.

Image Optimization

-8%

Potential reduce by 164.5 kB

  • Original 2.0 MB
  • After minification 1.8 MB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Caltech Zoom images are well optimized though.

Requests Breakdown

We found no issues to fix!

Requests Now

2

After Optimization

2

  • Images

The browser has sent 2 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Caltech Zoom. According to our analytics all requests are already optimized.

Network Requests Diagram

caltech.zoom.us

caltech.zoom.us

55 ms

caltech.zoom.us

caltech.zoom.us

121 ms

07b574b7-2236-4fd3-b135-0f7e209e12b5.png

07b574b7-2236-4fd3-b135-0f7e209e12b5.png

318 ms

caltech-new-logo.png

caltech-new-logo.png

51 ms

Accessibility Review

caltech.zoom.us accessibility score

88

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

caltech.zoom.us best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

SEO Factors

caltech.zoom.us SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Caltech.zoom.us can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Caltech.zoom.us main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

caltech.zoom.us

Open Graph description is not detected on the main page of Caltech Zoom. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: