Report Summary

  • 40

    Performance

    Renders faster than
    60% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

j1fm.tokyo

J1 Radio

Page Load Speed

2.7 sec in total

First Response

267 ms

Resources Loaded

2.1 sec

Page Rendered

314 ms

j1fm.tokyo screenshot

About Website

Visit j1fm.tokyo now to see the best up-to-date J1 Fm content for United States and also check out these interesting facts you probably never knew about j1fm.tokyo

J1 Loves Japan

Visit j1fm.tokyo

Key Findings

We analyzed J1fm.tokyo page load time and found that the first response time was 267 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

j1fm.tokyo performance score

40

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

19/100

10%

LCP (Largest Contentful Paint)

Value16.1 s

0/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value150 ms

95/100

30%

CLS (Cumulative Layout Shift)

Value0.628

9/100

15%

TTI (Time to Interactive)

Value7.5 s

48/100

10%

Network Requests Diagram

j1fm.tokyo

267 ms

en.j1fm.tokyo

258 ms

41207fb36c7f2ed5bec69de30fb9194f.css

30 ms

5eea911f87e7293d814f2ab0b6d28a87.css

30 ms

5af4a3379bce25bf74a959939d331c94.css

28 ms

Our browser made a total of 121 requests to load all elements on the main page. We found that 5% of them (6 requests) were addressed to the original J1fm.tokyo, 29% (35 requests) were made to En.j1fm.tokyo and 17% (21 requests) were made to J1fm.com. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Eew.j1fm.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 256.6 kB (38%)

Content Size

669.0 kB

After Optimization

412.4 kB

In fact, the total size of J1fm.tokyo main page is 669.0 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. 60% of websites need less resources to load. Images take 450.7 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 51.2 kB

  • Original 63.9 kB
  • After minification 61.1 kB
  • After compression 12.7 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 51.2 kB or 80% of the original size.

Image Optimization

-23%

Potential reduce by 105.3 kB

  • Original 450.7 kB
  • After minification 345.4 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. Obviously, J1 Fm needs image optimization as it can save up to 105.3 kB or 23% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-52%

Potential reduce by 46.5 kB

  • Original 89.9 kB
  • After minification 82.5 kB
  • After compression 43.4 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 46.5 kB or 52% of the original size.

CSS Optimization

-83%

Potential reduce by 53.6 kB

  • Original 64.5 kB
  • After minification 32.1 kB
  • After compression 10.9 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. J1fm.tokyo needs all CSS files to be minified and compressed as it can save up to 53.6 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 61 (54%)

Requests Now

114

After Optimization

53

The browser has sent 114 CSS, Javascripts, AJAX and image requests in order to completely render the main page of J1 Fm. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 30 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

j1fm.tokyo accessibility score

81

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

Best Practices

j1fm.tokyo 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

j1fm.tokyo 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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise J1fm.tokyo can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that J1fm.tokyo 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 description is not detected on the main page of J1 Fm. 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: