Tools & Wizards About Us
door.ac screenshot

Report Summary

  • 17

    Performance

    Renders faster than
    33% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 72

    SEO

    Google-friendlier than
    31% of websites

door.ac

【DOOR賃貸】賃貸(賃貸マンション・アパート・戸建賃貸)のお部屋探し

Page Load Speed

3.3 sec in total

First Response

597 ms

Resources Loaded

2 sec

Page Rendered

613 ms

door.ac screenshot

About Website

Welcome to door.ac homepage info - get ready to check Door best content for Japan right away, or after learning these important things about door.ac

【入居祝金あり】賃貸マンション、アパート、戸建賃貸の物件情報が日本最大級の「DOOR賃貸」なら、敷礼なし、ワンルームなどのこだわり条件で理想の物件が見つかります。

Visit door.ac

Key Findings

We analyzed Door.ac page load time and found that the first response time was 597 ms and then it took 2.7 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

door.ac performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.6 s

2/100

10%

LCP (Largest Contentful Paint)

Value8.1 s

2/100

25%

SI (Speed Index)

Value10.7 s

7/100

10%

TBT (Total Blocking Time)

Value3,410 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value19.2 s

2/100

10%

Network Requests Diagram

door.ac

597 ms

screen.css

178 ms

door.css

345 ms

common.js

355 ms

reset.css

187 ms

Our browser made a total of 22 requests to load all elements on the main page. We found that all of those requests were addressed to Door.ac and no external sources were called. The less responsive or slowest element that took the longest time to load (878 ms) belongs to the original domain Door.ac.

Page Optimization Overview & Recommendations

Page size can be reduced by 48.1 kB (84%)

Content Size

57.0 kB

After Optimization

9.0 kB

  • HTML
  • CSS

In fact, the total size of Door.ac main page is 57.0 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. Only 10% of websites need less resources to load. CSS take 44.4 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 11.2 kB

  • Original 12.6 kB
  • After minification 3.3 kB
  • After compression 1.4 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. This page needs HTML code to be minified as it can gain 9.3 kB, which is 74% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 11.2 kB or 89% of the original size.

CSS Optimization

-83%

Potential reduce by 36.9 kB

  • Original 44.4 kB
  • After minification 33.6 kB
  • After compression 7.6 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. Door.ac needs all CSS files to be minified and compressed as it can save up to 36.9 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (58%)

Requests Now

19

After Optimization

8

  • Images
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Door. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

door.ac

door.ac

597 ms

screen.css

screen.css

178 ms

door.css

door.css

345 ms

common.js

common.js

355 ms

reset.css

reset.css

187 ms

common.css

common.css

344 ms

style.css

style.css

356 ms

Js_upLook.css

Js_upLook.css

360 ms

bg.gif

bg.gif

176 ms

bg_liner.gif

bg_liner.gif

183 ms

bg_container.gif

bg_container.gif

181 ms

bg_wrapper.gif

bg_wrapper.gif

190 ms

logo_doorOnly.gif

logo_doorOnly.gif

194 ms

icon_user.gif

icon_user.gif

193 ms

icon_header_date_new.gif

icon_header_date_new.gif

334 ms

bl_home.gif

bl_home.gif

351 ms

bl.gif

bl.gif

349 ms

h.gif

h.gif

528 ms

line_dot.gif

line_dot.gif

371 ms

bg_footer.gif

bg_footer.gif

376 ms

icon_common.gif

icon_common.gif

506 ms

common.gif

common.gif

878 ms

Accessibility Review

door.ac accessibility score

65

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

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

door.ac best practices score

67

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

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

door.ac SEO score

72

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

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 Door.ac 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 Door.ac 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

door.ac

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