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scratch.mit.edu screenshot

Report Summary

  • 6

    Performance

    Renders faster than
    21% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 81

    SEO

    Google-friendlier than
    43% of websites

scratch.mit.edu

Scratch - Imagine, Program, Share

Page Load Speed

456 ms in total

First Response

28 ms

Resources Loaded

350 ms

Page Rendered

78 ms

scratch.mit.edu screenshot

About Website

Welcome to scratch.mit.edu homepage info - get ready to check Scratch Mit best content for United States right away, or after learning these important things about scratch.mit.edu

Scratch is a free programming language and online community where you can create your own interactive stories, games, and animations.

Visit scratch.mit.edu

Key Findings

We analyzed Scratch.mit.edu page load time and found that the first response time was 28 ms and then it took 428 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

scratch.mit.edu performance score

6

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.5 s

0/100

10%

LCP (Largest Contentful Paint)

Value14.2 s

0/100

25%

SI (Speed Index)

Value9.5 s

11/100

10%

TBT (Total Blocking Time)

Value1,700 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value1.274

1/100

15%

TTI (Time to Interactive)

Value13.0 s

13/100

10%

Network Requests Diagram

scratch.mit.edu

28 ms

gtm.js

293 ms

normalize.min.css

7 ms

common.css

14 ms

splash.css

14 ms

Our browser made a total of 9 requests to load all elements on the main page. We found that 89% of them (8 requests) were addressed to the original Scratch.mit.edu, 11% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (293 ms) relates to the external source Googletagmanager.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 3.0 kB (0%)

Content Size

1.4 MB

After Optimization

1.4 MB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Scratch.mit.edu main page is 1.4 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. 70% of websites need less resources to load. Javascripts take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 2.8 kB

  • Original 4.1 kB
  • After minification 3.2 kB
  • After compression 1.3 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. This page needs HTML code to be minified as it can gain 868 B, which is 21% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 2.8 kB or 69% of the original size.

JavaScript Optimization

-0%

Potential reduce by 12 B

  • Original 1.3 MB
  • After minification 1.3 MB
  • After compression 1.3 MB

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

-1%

Potential reduce by 96 B

  • Original 9.5 kB
  • After minification 9.5 kB
  • After compression 9.4 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. Scratch.mit.edu has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 4 (50%)

Requests Now

8

After Optimization

4

  • JavaScript
  • CSS

The browser has sent 8 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Scratch Mit. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

scratch.mit.edu

scratch.mit.edu

28 ms

gtm.js

gtm.js

293 ms

normalize.min.css

normalize.min.css

7 ms

common.css

common.css

14 ms

splash.css

splash.css

14 ms

polyfill.min.js

polyfill.min.js

19 ms

common.bundle.js

common.bundle.js

36 ms

splash.intl.js

splash.intl.js

67 ms

splash.bundle.js

splash.bundle.js

50 ms

Accessibility Review

scratch.mit.edu accessibility score

91

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.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Links do not have a discernible name

Best Practices

scratch.mit.edu 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

scratch.mit.edu SEO score

81

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

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

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 Scratch.mit.edu 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 Scratch.mit.edu 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

scratch.mit.edu

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