Tools & Wizards About Us
onsen.ag screenshot

Report Summary

  • 8

    Performance

    Renders faster than
    22% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 85

    SEO

    Google-friendlier than
    56% of websites

onsen.ag

インターネットラジオステーション＜音泉＞

Page Load Speed

4.6 sec in total

First Response

873 ms

Resources Loaded

3.6 sec

Page Rendered

70 ms

onsen.ag screenshot

About Website

Visit onsen.ag now to see the best up-to-date Onsen content for Japan and also check out these interesting facts you probably never knew about onsen.ag

インターネットラジオステーション＜音泉＞はアニメ・ゲーム・声優系を中心としたラジオを配信するサイトです。24時間毎日いつでも好きな時、好きな番組がカンタンに聴けます！移動時や作業中におすすめのスマートフォンアプリでも配信中！音泉プレミアムサポーターだけが楽しめるアプリ限定番組は必聴です！

Visit onsen.ag

Key Findings

We analyzed Onsen.ag page load time and found that the first response time was 873 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

onsen.ag performance score

8

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

20/100

10%

LCP (Largest Contentful Paint)

Value20.3 s

0/100

25%

SI (Speed Index)

Value15.3 s

1/100

10%

TBT (Total Blocking Time)

Value2,380 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0.36

30/100

15%

TTI (Time to Interactive)

Value17.9 s

3/100

10%

Network Requests Diagram

www.onsen.ag

873 ms

normalize.css

343 ms

slick-theme.css

352 ms

slick.css

358 ms

css2

36 ms

Our browser made a total of 32 requests to load all elements on the main page. We found that 66% of them (21 requests) were addressed to the original Onsen.ag, 16% (5 requests) were made to D3bzklg4lms4gh.cloudfront.net and 6% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Onsen.ag.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (37%)

Content Size

2.8 MB

After Optimization

1.7 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Onsen.ag main page is 2.8 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. 35% of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 980.6 kB

  • Original 1.2 MB
  • After minification 1.2 MB
  • After compression 180.9 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 980.6 kB or 84% of the original size.

Image Optimization

-1%

Potential reduce by 9.2 kB

  • Original 1.6 MB
  • After minification 1.5 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. Onsen images are well optimized though.

JavaScript Optimization

-60%

Potential reduce by 32.0 kB

  • Original 52.9 kB
  • After minification 52.9 kB
  • After compression 20.9 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 32.0 kB or 60% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (55%)

Requests Now

31

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Onsen. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.onsen.ag

www.onsen.ag

873 ms

normalize.css

normalize.css

343 ms

slick-theme.css

slick-theme.css

352 ms

slick.css

slick.css

358 ms

css2

css2

36 ms

style.css

style.css

347 ms

jquery-1.11.3.min.js

jquery-1.11.3.min.js

668 ms

f393b1a04b89eddfd15a.js

f393b1a04b89eddfd15a.js

505 ms

8fbf2e6ca34e36cbfbb6.js

8fbf2e6ca34e36cbfbb6.js

193 ms

6cd943c72a4f941a626d.js

6cd943c72a4f941a626d.js

506 ms

323f6261ef2173b89642.js

323f6261ef2173b89642.js

698 ms

e8668ca8ef91aff9fdb6.js

e8668ca8ef91aff9fdb6.js

1187 ms

3722d9310684bb91afb8.js

3722d9310684bb91afb8.js

859 ms

jquery.matchHeight-min.js

jquery.matchHeight-min.js

687 ms

image

image

150 ms

98a6440.png

98a6440.png

336 ms

icon-header-02.png

icon-header-02.png

354 ms

icon-container-01.png

icon-container-01.png

662 ms

icon-container-02.png

icon-container-02.png

660 ms

banner.jpg

banner.jpg

1140 ms

image

image

142 ms

image

image

144 ms

image

image

506 ms

image

image

144 ms

js

js

79 ms

95f202d90c6146563686.js

95f202d90c6146563686.js

185 ms

f5bdf4e30bc0d865c63e.js

f5bdf4e30bc0d865c63e.js

829 ms

730de87b5f5b516f075d.js

730de87b5f5b516f075d.js

502 ms

js

js

43 ms

analytics.js

analytics.js

26 ms

collect

collect

12 ms

collect

collect

23 ms

Accessibility Review

onsen.ag accessibility score

82

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

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

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>).

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

onsen.ag 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

onsen.ag SEO score

85

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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Onsen.ag can be misinterpreted by Google and other search engines. Our service has detected that Japanese 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 Onsen.ag 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

onsen.ag

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