Tools & Wizards About Us

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

codecamp.jp

プログラミング学ぶなら、オンラインレッスンNo.1 | オンラインプログラミングスクールCodeCamp（コードキャンプ）

Page Load Speed

7.4 sec in total

First Response

298 ms

Resources Loaded

5.6 sec

Page Rendered

1.5 sec

About Website

Welcome to codecamp.jp homepage info - get ready to check Codecamp best content for Japan right away, or after learning these important things about codecamp.jp

CodeCamp（コードキャンプ）はオンラインのプログラミング/Webデザイン学習サービス。実践型カリキュラムで、技術力/指導力を備えた講師が徹底的に指導。DXを実現するなら、オンラインのプログラミング/Webデザイン学習CodeCamp

Visit codecamp.jp

Key Findings

We analyzed Codecamp.jp page load time and found that the first response time was 298 ms and then it took 7.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

codecamp.jp performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

62/100

10%

LCP (Largest Contentful Paint)

Value15.5 s

0/100

25%

SI (Speed Index)

Value4.6 s

70/100

10%

TBT (Total Blocking Time)

Value2,630 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value32.6 s

0/100

10%

Network Requests Diagram

codecamp.jp

298 ms

codecamp.jp

1334 ms

gtm.js

75 ms

application-149acbf7a08cd509f2d7bb7e461349a8142ca5891145e1f89b9e2df4c6f67e62.css

722 ms

services-5bed0f39c2e42b9b61a5602e1488cb20d023fd4664fe077c799b09a9a732dfbc.js

1461 ms

Our browser made a total of 98 requests to load all elements on the main page. We found that 5% of them (5 requests) were addressed to the original Codecamp.jp, 93% (91 requests) were made to S3-ap-northeast-1.amazonaws.com and 1% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2.2 sec) relates to the external source S3-ap-northeast-1.amazonaws.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 306.6 kB (6%)

Content Size

4.7 MB

After Optimization

4.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Codecamp.jp main page is 4.7 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. 40% of websites need less resources to load. Images take 4.4 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 65.6 kB

  • Original 83.9 kB
  • After minification 83.8 kB
  • After compression 18.3 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. 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 65.6 kB or 78% of the original size.

Image Optimization

-5%

Potential reduce by 241.1 kB

  • Original 4.4 MB
  • After minification 4.2 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. Codecamp images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 0 B

  • Original 185.0 kB
  • After minification 185.0 kB
  • After compression 185.0 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

-0%

Potential reduce by 0 B

  • Original 59.7 kB
  • After minification 59.7 kB
  • After compression 59.7 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. Codecamp.jp has all CSS files already compressed.

Requests Breakdown

We found no issues to fix!

Requests Now

96

After Optimization

96

  • Images
  • JavaScript
  • CSS

The browser has sent 96 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Codecamp. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

codecamp.jp accessibility score

76

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.

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

Best Practices

codecamp.jp 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

codecamp.jp SEO score

93

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

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

    JA

  • Language Claimed

    JA

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Codecamp.jp can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it matches the claimed language. Our system also found out that Codecamp.jp 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

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