Report Summary

  • 62

    Performance

    Renders faster than
    77% of other websites

  • 52

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 84

    SEO

    Google-friendlier than
    53% of websites

gaz.co.jp

パソコン,家電お買い物ナビ - GAZ

Page Load Speed

2.8 sec in total

First Response

570 ms

Resources Loaded

2.1 sec

Page Rendered

187 ms

gaz.co.jp screenshot

About Website

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

オンラインショップで販売されているパソコン,家電,AV機器,カーナビなどの価格比較ができるサイトです。

Visit gaz.co.jp

Key Findings

We analyzed Gaz.co.jp page load time and found that the first response time was 570 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

gaz.co.jp performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

40/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

44/100

25%

SI (Speed Index)

Value4.8 s

66/100

10%

TBT (Total Blocking Time)

Value110 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.472

18/100

15%

TTI (Time to Interactive)

Value4.2 s

85/100

10%

Network Requests Diagram

gaz.co.jp

570 ms

www.gaz.co.jp

1503 ms

l1-6_2.js

354 ms

flex-0.js

348 ms

ga.js

79 ms

Our browser made a total of 11 requests to load all elements on the main page. We found that 82% of them (9 requests) were addressed to the original Gaz.co.jp, 18% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Gaz.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 19.3 kB (43%)

Content Size

44.4 kB

After Optimization

25.1 kB

In fact, the total size of Gaz.co.jp main page is 44.4 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. Only 10% of websites need less resources to load. HTML takes 24.2 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 17.4 kB

  • Original 24.2 kB
  • After minification 23.2 kB
  • After compression 6.8 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 17.4 kB or 72% of the original size.

Image Optimization

-11%

Potential reduce by 33 B

  • Original 292 B
  • After minification 259 B

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, GAZ needs image optimization as it can save up to 33 B or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-9%

Potential reduce by 1.9 kB

  • Original 19.9 kB
  • After minification 19.5 kB
  • After compression 18.0 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.

Requests Breakdown

We found no issues to fix!

Requests Now

9

After Optimization

9

The browser has sent 9 CSS, Javascripts, AJAX and image requests in order to completely render the main page of GAZ. According to our analytics all requests are already optimized.

Accessibility Review

gaz.co.jp accessibility score

52

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

Form elements do not have associated labels

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

gaz.co.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

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

gaz.co.jp SEO score

84

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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

    JA

  • Language Claimed

    N/A

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Gaz.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 Gaz.co.jp main page’s claimed encoding is shift_jis. 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 GAZ. 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: