Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

jbrain.co.kr

일본어취업포털_제이브레인

Page Load Speed

19.1 sec in total

First Response

1.6 sec

Resources Loaded

17.2 sec

Page Rendered

309 ms

jbrain.co.kr screenshot

About Website

Visit jbrain.co.kr now to see the best up-to-date Jbrain content for South Korea and also check out these interesting facts you probably never knew about jbrain.co.kr

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Visit jbrain.co.kr

Key Findings

We analyzed Jbrain.co.kr page load time and found that the first response time was 1.6 sec and then it took 17.5 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

jbrain.co.kr performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.2 s

0/100

10%

LCP (Largest Contentful Paint)

Value19.1 s

0/100

25%

SI (Speed Index)

Value17.8 s

0/100

10%

TBT (Total Blocking Time)

Value7,780 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.014

100/100

15%

TTI (Time to Interactive)

Value20.1 s

2/100

10%

Network Requests Diagram

index.html

1570 ms

rankup_style.css

1028 ms

prototype.js

1676 ms

form.js

847 ms

common.js

1062 ms

Our browser made a total of 179 requests to load all elements on the main page. We found that all of those requests were addressed to Jbrain.co.kr and no external sources were called. The less responsive or slowest element that took the longest time to load (5 sec) belongs to the original domain Jbrain.co.kr.

Page Optimization Overview & Recommendations

Page size can be reduced by 343.7 kB (55%)

Content Size

625.3 kB

After Optimization

281.6 kB

In fact, the total size of Jbrain.co.kr main page is 625.3 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. 20% of websites need less resources to load. Javascripts take 240.3 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 110.4 kB

  • Original 126.4 kB
  • After minification 112.8 kB
  • After compression 16.0 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 13.7 kB, which is 11% 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 110.4 kB or 87% of the original size.

Image Optimization

-6%

Potential reduce by 14.3 kB

  • Original 225.7 kB
  • After minification 211.4 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. Jbrain images are well optimized though.

JavaScript Optimization

-80%

Potential reduce by 191.5 kB

  • Original 240.3 kB
  • After minification 186.8 kB
  • After compression 48.8 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 191.5 kB or 80% of the original size.

CSS Optimization

-84%

Potential reduce by 27.4 kB

  • Original 32.7 kB
  • After minification 29.3 kB
  • After compression 5.4 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. Jbrain.co.kr needs all CSS files to be minified and compressed as it can save up to 27.4 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 117 (66%)

Requests Now

178

After Optimization

61

The browser has sent 178 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jbrain. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

jbrain.co.kr accessibility score

74

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

jbrain.co.kr best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

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

jbrain.co.kr SEO score

86

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

Language and Encoding

  • Language Detected

    KO

  • Language Claimed

    N/A

  • Encoding

    EUC-KR

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jbrain.co.kr can be misinterpreted by Google and other search engines. Our service has detected that Korean 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 Jbrain.co.kr main page’s claimed encoding is euc-kr. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

Open Graph description is not detected on the main page of Jbrain. 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: