Access rfc.co.jp. rfc[ラジオ福島]公式ホームページ　ワイドFM全局開局！AMでもFMでも!

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

24/100

10%

LCP (Largest Contentful Paint)

Value42.6 s

0/100

25%

SI (Speed Index)

Value20.9 s

0/100

10%

TBT (Total Blocking Time)

Value1,520 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0.246

50/100

15%

TTI (Time to Interactive)

Value37.8 s

0/100

10%

rfc.co.jp

1503 ms

common.css

505 ms

index.css

671 ms

font-awesome.min.css

5 ms

jquery-1.7.2.min.js

1090 ms

Our browser made a total of 130 requests to load all elements on the main page. We found that 53% of them (69 requests) were addressed to the original Rfc.co.jp, 18% (24 requests) were made to Rfc.jp and 12% (16 requests) were made to Pbs.twimg.com. The less responsive or slowest element that took the longest time to load (8.9 sec) belongs to the original domain Rfc.co.jp.

Content Size

2.3 MB

After Optimization

1.6 MB

In fact, the total size of Rfc.co.jp main page is 2.3 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. 65% of websites need less resources to load. Images take 2.0 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 34.1 kB

Original 43.7 kB
After minification 41.8 kB
After compression 9.6 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 34.1 kB or 78% of the original size.

Image Optimization

-25%

Potential reduce by 494.2 kB

Original 2.0 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. Obviously, Rfc needs image optimization as it can save up to 494.2 kB or 25% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-61%

Potential reduce by 103.3 kB

Original 170.5 kB
After minification 156.0 kB
After compression 67.2 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 103.3 kB or 61% of the original size.

CSS Optimization

-82%

Potential reduce by 75.0 kB

Original 91.3 kB
After minification 82.2 kB
After compression 16.3 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. Rfc.co.jp needs all CSS files to be minified and compressed as it can save up to 75.0 kB or 82% of the original size.

Requests Now

128

After Optimization

The browser has sent 128 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rfc. 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 12 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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.

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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

High

Image elements do not have [alt] attributes

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/).

High

Document uses 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 Rfc.co.jp 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 Rfc.co.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

rfc.co.jp

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

Report Summary

Performance

Accessibility

Best Practices

SEO

rfc[ラジオ福島]公式ホームページ ワイドFM全局開局！AMでもFMでも!

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

rfc.co.jp

common.css

index.css

font-awesome.min.css

jquery-1.7.2.min.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

rfc.co.jp

common.css

index.css

font-awesome.min.css

jquery-1.7.2.min.js

jquery.pngFix.js

smoothScroll.js

jquery.flexslider-min.js

colorbox.css

jquery.colorbox.js

rfc_common.js

rfc_index2.js

import_html5reset-1.6.1.css

import_text.css

analytics.js

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rfc[ラジオ福島]公式ホームページ　ワイドFM全局開局！AMでもFMでも!