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3blue1brown.com screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

3blue1brown.com

3Blue1Brown

Page Load Speed

1.4 sec in total

First Response

131 ms

Resources Loaded

816 ms

Page Rendered

417 ms

3blue1brown.com screenshot

About Website

Welcome to 3blue1brown.com homepage info - get ready to check 3Blue1Brown best content for United States right away, or after learning these important things about 3blue1brown.com

Mathematics with a distinct visual perspective. Linear algebra, calculus, neural networks, topology, and more.

Visit 3blue1brown.com

Key Findings

We analyzed 3blue1brown.com page load time and found that the first response time was 131 ms and then it took 1.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

3blue1brown.com performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

39/100

10%

LCP (Largest Contentful Paint)

Value8.9 s

1/100

25%

SI (Speed Index)

Value6.8 s

35/100

10%

TBT (Total Blocking Time)

Value2,460 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.192

64/100

15%

TTI (Time to Interactive)

Value18.7 s

3/100

10%

Network Requests Diagram

3blue1brown.com

131 ms

3blue1brown.com

19 ms

www.3blue1brown.com

62 ms

all.css

63 ms

js

80 ms

Our browser made a total of 116 requests to load all elements on the main page. We found that 29% of them (34 requests) were addressed to the original 3blue1brown.com, 54% (63 requests) were made to Substackcdn.com and 7% (8 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (394 ms) belongs to the original domain 3blue1brown.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 254.5 kB (41%)

Content Size

626.2 kB

After Optimization

371.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 3blue1brown.com main page is 626.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. HTML takes 314.1 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 244.2 kB

  • Original 314.1 kB
  • After minification 314.0 kB
  • After compression 69.9 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 244.2 kB or 78% of the original size.

Image Optimization

-4%

Potential reduce by 3.8 kB

  • Original 103.6 kB
  • After minification 99.7 kB

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. 3Blue1Brown images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 33 B

  • Original 58.5 kB
  • After minification 58.5 kB
  • After compression 58.4 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-4%

Potential reduce by 6.5 kB

  • Original 150.1 kB
  • After minification 150.0 kB
  • After compression 143.6 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. 3blue1brown.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 78 (76%)

Requests Now

102

After Optimization

24

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 102 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 3Blue1Brown. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 63 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

3blue1brown.com

3blue1brown.com

131 ms

3blue1brown.com

3blue1brown.com

19 ms

www.3blue1brown.com

www.3blue1brown.com

62 ms

all.css

all.css

63 ms

js

js

80 ms

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b165666056315602.css

228 ms

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polyfills-c67a75d1b6f99dc8.js

394 ms

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webpack-2803c7b99464701e.js

388 ms

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32 ms

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32 ms

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50 ms

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51 ms

maxresdefault.jpg

maxresdefault.jpg

49 ms

embed

embed

115 ms

pi-comment.svg

pi-comment.svg

20 ms

calculus.svg

calculus.svg

23 ms

linear-algebra.svg

linear-algebra.svg

24 ms

neural-networks.svg

neural-networks.svg

26 ms

differential-equations.svg

differential-equations.svg

34 ms

puzzles.svg

puzzles.svg

31 ms

why-pi.svg

why-pi.svg

37 ms

geometry.svg

geometry.svg

38 ms

analysis.svg

analysis.svg

41 ms

physics.svg

physics.svg

43 ms

probability.svg

probability.svg

53 ms

computer-science.svg

computer-science.svg

45 ms

topology.svg

topology.svg

47 ms

group-theory.svg

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49 ms

epidemics.svg

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189 ms

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174 ms

beacon.min.js

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201 ms

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Accessibility Review

3blue1brown.com accessibility score

77

Accessibility Issues

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.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

3blue1brown.com 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

3blue1brown.com SEO score

82

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

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 3blue1brown.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that 3blue1brown.com 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

3blue1brown.com

Open Graph data is detected on the main page of 3Blue1Brown. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: