Tools & Wizards About Us
u-doctor.com screenshot

Report Summary

  • 3

    Performance

    Renders faster than
    20% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

u-doctor.com

ガス給湯器交換なら【湯ドクター】|最大82%オフ

Page Load Speed

30.9 sec in total

First Response

694 ms

Resources Loaded

28.7 sec

Page Rendered

1.5 sec

u-doctor.com screenshot

About Website

Click here to check amazing U Doctor content for Japan. Otherwise, check out these important facts you probably never knew about u-doctor.com

湯ドクターは、給湯器・ガス給湯器・風呂釜の取付、交換、修理などの工事を全国対応しております。長期保証付きで、価格もお求めやすくなっております。湯ドクターは、創業昭和2年の実績を元に、お客様に安心と信頼でお応えします。

Visit u-doctor.com

Key Findings

We analyzed U-doctor.com page load time and found that the first response time was 694 ms and then it took 30.2 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

u-doctor.com performance score

3

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

10/100

10%

LCP (Largest Contentful Paint)

Value17.0 s

0/100

25%

SI (Speed Index)

Value20.6 s

0/100

10%

TBT (Total Blocking Time)

Value4,780 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.519

15/100

15%

TTI (Time to Interactive)

Value29.7 s

0/100

10%

Network Requests Diagram

u-doctor.com

694 ms

www.u-doctor.com

649 ms

www.u-doctor.com

3419 ms

ytag.js

1185 ms

jquery-1.10.1.min.js

664 ms

Our browser made a total of 259 requests to load all elements on the main page. We found that 77% of them (199 requests) were addressed to the original U-doctor.com, 6% (15 requests) were made to App.chatplus.jp and 3% (7 requests) were made to Appimg.chatplus.jp. The less responsive or slowest element that took the longest time to load (6.4 sec) belongs to the original domain U-doctor.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 383.6 kB (8%)

Content Size

4.9 MB

After Optimization

4.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of U-doctor.com main page is 4.9 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 4.3 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 131.8 kB

  • Original 169.9 kB
  • After minification 169.7 kB
  • After compression 38.1 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 131.8 kB or 78% of the original size.

Image Optimization

-4%

Potential reduce by 184.3 kB

  • Original 4.3 MB
  • After minification 4.1 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. U Doctor images are well optimized though.

JavaScript Optimization

-20%

Potential reduce by 67.2 kB

  • Original 329.0 kB
  • After minification 327.7 kB
  • After compression 261.8 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 67.2 kB or 20% of the original size.

CSS Optimization

-0%

Potential reduce by 331 B

  • Original 70.8 kB
  • After minification 70.8 kB
  • After compression 70.5 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. U-doctor.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 90 (36%)

Requests Now

251

After Optimization

161

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 251 CSS, Javascripts, AJAX and image requests in order to completely render the main page of U Doctor. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 42 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

u-doctor.com

u-doctor.com

694 ms

www.u-doctor.com

www.u-doctor.com

649 ms

www.u-doctor.com

www.u-doctor.com

3419 ms

ytag.js

ytag.js

1185 ms

jquery-1.10.1.min.js

jquery-1.10.1.min.js

664 ms

autoptimize_7476ad1bf33eb7cb8d17a602ef6551ca.css

autoptimize_7476ad1bf33eb7cb8d17a602ef6551ca.css

683 ms

top.js

top.js

586 ms

jquery.bxslider.js

jquery.bxslider.js

603 ms

jquery.easing.1.3.js

jquery.easing.1.3.js

725 ms

jquery.matchHeight-min.js

jquery.matchHeight-min.js

987 ms

scrollInner.js

scrollInner.js

1336 ms

jquery.ptop.js

jquery.ptop.js

1337 ms

nav.js

nav.js

1336 ms

common.js

common.js

1382 ms

common_sp.js

common_sp.js

1449 ms

sp-slidemenu.js

sp-slidemenu.js

1532 ms

jquery.mousewheel.js

jquery.mousewheel.js

1830 ms

jquery.jscrollpane.min.js

jquery.jscrollpane.min.js

1923 ms

bookmark_button.js

bookmark_button.js

30 ms

s_retargeting.js

s_retargeting.js

1087 ms

conversion.js

conversion.js

83 ms

so_sg.js

so_sg.js

1073 ms

scrlmenu.js

scrlmenu.js

1753 ms

drawer.js

drawer.js

1795 ms

drawer2.js

drawer2.js

1794 ms

gtm.js

gtm.js

285 ms

gtm.js

gtm.js

356 ms

fbevents.js

fbevents.js

284 ms

lt.js

lt.js

284 ms

analytics.js

analytics.js

353 ms

button-only@2x.png

button-only@2x.png

70 ms

header_logo.png

header_logo.png

1660 ms

header_txt.png

header_txt.png

1767 ms

header_txt2.png

header_txt2.png

1808 ms

header_bnr_gas.png

header_bnr_gas.png

2053 ms

header_tel.png

header_tel.png

1904 ms

nav_btn_close.png

nav_btn_close.png

1910 ms

sp_scrl_01.png

sp_scrl_01.png

2250 ms

sp_scrl_02.png

sp_scrl_02.png

2259 ms

sp_scrl_03.png

sp_scrl_03.png

2396 ms

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sp_scrl_04.png

2493 ms

sp_scrl_05.png

sp_scrl_05.png

2591 ms

sp_scrl_06.png

sp_scrl_06.png

2549 ms

botban01.png

botban01.png

2752 ms

botban02.png

botban02.png

2842 ms

botban03.png

botban03.png

3079 ms

botban04.png

botban04.png

3179 ms

sp_btn_contact.png

sp_btn_contact.png

3184 ms

sp_btn_estimate.png

sp_btn_estimate.png

3245 ms

sp_btn_menu.png

sp_btn_menu.png

3247 ms

linebutton.png

linebutton.png

3434 ms

slide_pic06.jpg

slide_pic06.jpg

4493 ms

slide_pic06_sp.jpg

slide_pic06_sp.jpg

4355 ms

all.js

all.js

340 ms

slide_pic01.jpg

slide_pic01.jpg

4389 ms

slide_pic01_sp.jpg

slide_pic01_sp.jpg

4232 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

3970 ms

err.gif

err.gif

722 ms

all.js

all.js

49 ms

collect

collect

53 ms

seal.min.js

seal.min.js

71 ms

33 ms

collect

collect

28 ms

46 ms

js

js

1172 ms

slide_pic02.jpg

slide_pic02.jpg

4082 ms

slide_pic02_sp.jpg

slide_pic02_sp.jpg

4584 ms

tag.js

tag.js

219 ms

slide_pic05.jpg

slide_pic05.jpg

5234 ms

26 ms

slide_pic05_sp.jpg

slide_pic05_sp.jpg

5232 ms

slide_pic03.jpg

slide_pic03.jpg

4844 ms

slide_pic03_sp.jpg

slide_pic03_sp.jpg

4869 ms

slide_pic04.jpg

slide_pic04.jpg

4621 ms

slide_pic04_sp.jpg

slide_pic04_sp.jpg

5374 ms

slide_pic03.jpg

slide_pic03.jpg

5508 ms

illarea_img01.jpg

illarea_img01.jpg

4872 ms

illarea_img03.jpg

illarea_img03.jpg

4916 ms

179 ms

illarea_img11.jpg

illarea_img11.jpg

5037 ms

illarea_img12.jpg

illarea_img12.jpg

4791 ms

sosync

sosync

180 ms

illarea_img13.jpg

illarea_img13.jpg

5162 ms

illarea_img10.jpg

illarea_img10.jpg

4921 ms

logo_noritz.png

logo_noritz.png

5342 ms

24 ms

pixel

pixel

40 ms

v2

v2

3 ms

sync

sync

677 ms

sync

sync

27 ms

16 ms

logo_rinnai.png

logo_rinnai.png

5225 ms

pixel

pixel

21 ms

sync

sync

815 ms

logo_paloma.png

logo_paloma.png

5041 ms

logo_purpose.png

logo_purpose.png

5115 ms

cp.js

cp.js

693 ms

sd

sd

7 ms

side_bnr_satisfaction_sp.jpg

side_bnr_satisfaction_sp.jpg

6017 ms

Pug

Pug

18 ms

reason_pic01.jpg

reason_pic01.jpg

5137 ms

reason_pic02.jpg

reason_pic02.jpg

5365 ms

reason_pic03.jpg

reason_pic03.jpg

5490 ms

hs

hs

817 ms

um

um

140 ms

reason_pic04.jpg

reason_pic04.jpg

5278 ms

tap.php

tap.php

26 ms

logo_rinnai.png

logo_rinnai.png

5127 ms

chatplusscript.min.js

chatplusscript.min.js

175 ms

jqueryc.min.js

jqueryc.min.js

30 ms

riot%2Bcompiler_2.min.js

riot%2Bcompiler_2.min.js

53 ms

underscorec.min.js

underscorec.min.js

54 ms

c

c

468 ms

RUX-A2015WA-192x300.jpg

RUX-A2015WA-192x300.jpg

5244 ms

ico_construction10.png

ico_construction10.png

5285 ms

ico_product07.png

ico_product07.png

5312 ms

logo_noritz.png

logo_noritz.png

5373 ms

GQ-1639WS1-195x300.jpg

GQ-1639WS1-195x300.jpg

5517 ms

logo_paloma.png

logo_paloma.png

5479 ms

ce2e871d_1

ce2e871d_1

230 ms

all-cp.min.css

all-cp.min.css

30 ms

chat_common.min.css

chat_common.min.css

172 ms

chat.min.css

chat.min.css

329 ms

design.1711333282.css

design.1711333282.css

41 ms

onerror.min.js

onerror.min.js

391 ms

visitor-client.min.js

visitor-client.min.js

492 ms

slick.min.js

slick.min.js

40 ms

startup

startup

611 ms

output.tag.js

output.tag.js

172 ms

chat.tag.js

chat.tag.js

337 ms

ph-2015aw-186x300.png

ph-2015aw-186x300.png

4972 ms

RUFH-E2408AW2-6-191x300.jpg

RUFH-E2408AW2-6-191x300.jpg

4663 ms

ico_product10.png

ico_product10.png

4628 ms

GTH-C2460AW-187x300.jpg

GTH-C2460AW-187x300.jpg

4914 ms

logo_purpose.png

logo_purpose.png

4851 ms

parts

parts

415 ms

initialize

initialize

529 ms

gh-hk240-233x300.jpg

gh-hk240-233x300.jpg

4748 ms

sp_btn_click.png

sp_btn_click.png

4602 ms

collect

collect

30 ms

eyecatcher.png

eyecatcher.png

27 ms

ping

ping

407 ms

sp_btn_short.png

sp_btn_short.png

4488 ms

sp_btn_long.png

sp_btn_long.png

4552 ms

btn_click.png

btn_click.png

4269 ms

btn_short.jpg

btn_short.jpg

4453 ms

btn_long.jpg

btn_long.jpg

4702 ms

25855716_s.jpg

25855716_s.jpg

5390 ms

installation_pic01.png

installation_pic01.png

4374 ms

installation_pic02.png

installation_pic02.png

4295 ms

installation_pic03.png

installation_pic03.png

4453 ms

installation_pic05.png

installation_pic05.png

4532 ms

step_num01.png

step_num01.png

4422 ms

step_num02.png

step_num02.png

4376 ms

step_num03.png

step_num03.png

4375 ms

step_num04.png

step_num04.png

4479 ms

step_num05.png

step_num05.png

4411 ms

step_num06.png

step_num06.png

4498 ms

illarea_img02.jpg

illarea_img02.jpg

4445 ms

illarea_img04.jpg

illarea_img04.jpg

4398 ms

illarea_img05.jpg

illarea_img05.jpg

4249 ms

illarea_img06.jpg

illarea_img06.jpg

4316 ms

illarea_img07.jpg

illarea_img07.jpg

4294 ms

illarea_img08.jpg

illarea_img08.jpg

4332 ms

illarea_img09.jpg

illarea_img09.jpg

4154 ms

2a5333dcaec45f9797a6884939597957.jpg

2a5333dcaec45f9797a6884939597957.jpg

4400 ms

f9cb64a94c68e353a153f340c815e084-e1708416880886.jpg

f9cb64a94c68e353a153f340c815e084-e1708416880886.jpg

4689 ms

384e42a215de48a3f9c3dfc977c9fb76-rotated.jpg

384e42a215de48a3f9c3dfc977c9fb76-rotated.jpg

4772 ms

2a5333dcaec45f9797a6884939597957-scaled.jpg

2a5333dcaec45f9797a6884939597957-scaled.jpg

6437 ms

726546c4f831b3e1daf73b0d8f068973.jpg

726546c4f831b3e1daf73b0d8f068973.jpg

5482 ms

thumb01.gif

thumb01.gif

4192 ms

oyugadenai.jpg

oyugadenai.jpg

4666 ms

info_pic02.jpg

info_pic02.jpg

5108 ms

info_pic01.png

info_pic01.png

4697 ms

specialist.jpg

specialist.jpg

5137 ms

specialist_sp.jpg

specialist_sp.jpg

6334 ms

botblue_tel.png

botblue_tel.png

5267 ms

side_bnr_inappropriate.png

side_bnr_inappropriate.png

4883 ms

side_bnr_satisfaction.jpg

side_bnr_satisfaction.jpg

5643 ms

bt_modal_close.png

bt_modal_close.png

4968 ms

logo_pana.png

logo_pana.png

5044 ms

logo_corona.png

logo_corona.png

4997 ms

logo_toshiba.png

logo_toshiba.png

4928 ms

logo_mitsubishi.png

logo_mitsubishi.png

5043 ms

logo_daikin.png

logo_daikin.png

5025 ms

logo_hitachi.png

logo_hitachi.png

4863 ms

footer_bnr_saiki.png

footer_bnr_saiki.png

5123 ms

footer_bnr_lixil.png

footer_bnr_lixil.png

5098 ms

footer_logo_horp.png

footer_logo_horp.png

5248 ms

footer_bnr_funtoshare.png

footer_bnr_funtoshare.png

5004 ms

footer_logo_jfec.png

footer_logo_jfec.png

4893 ms

footer_logo_it.png

footer_logo_it.png

4809 ms

footer_pagetop_sp.png

footer_pagetop_sp.png

5379 ms

nav_ico_waterHeater01.png

nav_ico_waterHeater01.png

5200 ms

nav_ico_waterHeater02.png

nav_ico_waterHeater02.png

5213 ms

nav_ico_waterHeater03.png

nav_ico_waterHeater03.png

4945 ms

nav_ico_waterHeater04.png

nav_ico_waterHeater04.png

4897 ms

nav_ico_waterHeater05.png

nav_ico_waterHeater05.png

4801 ms

nav_ico_waterHeater06.png

nav_ico_waterHeater06.png

5235 ms

nav_ico_waterHeater07.png

nav_ico_waterHeater07.png

5163 ms

loading.gif

loading.gif

5154 ms

baloon_orange.png

baloon_orange.png

4790 ms

reason_tit_bg.png

reason_tit_bg.png

4511 ms

bg_priceoff.png

bg_priceoff.png

4606 ms

arrow.png

arrow.png

4787 ms

icon_plus.png

icon_plus.png

4440 ms

arr_ora_right.png

arr_ora_right.png

4266 ms

step_txt_bg.png

step_txt_bg.png

4116 ms

step_illsust01.png

step_illsust01.png

4074 ms

step_illsust02.png

step_illsust02.png

3904 ms

step_illsust03.png

step_illsust03.png

3971 ms

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step_illsust04.png

3941 ms

step_illsust05.png

step_illsust05.png

3752 ms

ico_gas.png

ico_gas.png

3750 ms

ping

ping

401 ms

botblue_icon.png

botblue_icon.png

3640 ms

botblue_img.jpg

botblue_img.jpg

3837 ms

botgrn_icon.png

botgrn_icon.png

3725 ms

botgrn_icon02.png

botgrn_icon02.png

3610 ms

side_ico_purchase.png

side_ico_purchase.png

3725 ms

side_ico_purchase_01.png

side_ico_purchase_01.png

3808 ms

side_ico_purchase_02.png

side_ico_purchase_02.png

3640 ms

side_ico_purchase_03.png

side_ico_purchase_03.png

3842 ms

side_ico_purchase_04.png

side_ico_purchase_04.png

3451 ms

side_ico_guidance.png

side_ico_guidance.png

3523 ms

side_form_arrow.png

side_form_arrow.png

3623 ms

side_ico_search_arrow.png

side_ico_search_arrow.png

3627 ms

side_ico_pickup.png

side_ico_pickup.png

3731 ms

side_ico_pickup_01.png

side_ico_pickup_01.png

3843 ms

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side_ico_pickup_02.png

3367 ms

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side_ico_pickup_03.png

3448 ms

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side_ico_pickup_04.png

3431 ms

side_ico_deals.png

side_ico_deals.png

3622 ms

side_ico_deals_01.png

side_ico_deals_01.png

3717 ms

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side_ico_deals_02.png

3821 ms

side_ico_eco_01.png

side_ico_eco_01.png

3377 ms

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side_ico_eco_05.png

3379 ms

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side_ico_eco_03.png

3429 ms

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side_ico_eco_02.png

3758 ms

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3859 ms

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side_ico_eco_06.png

3779 ms

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side_ico_eco_07.png

3491 ms

side_ico_reference_01.png

side_ico_reference_01.png

3554 ms

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side_ico_reference_02.png

3524 ms

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side_ico_reference_03.png

3759 ms

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side_ico_reference_04.png

3709 ms

side_ico_error_01.png

side_ico_error_01.png

3682 ms

side_ico_error_02.png

side_ico_error_02.png

3423 ms

side_ico_case_01.png

side_ico_case_01.png

3555 ms

side_ico_case_02.png

side_ico_case_02.png

3423 ms

side_ico_case_03.png

side_ico_case_03.png

3752 ms

side_ico_company_04.png

side_ico_company_04.png

3650 ms

side_ico_company_01.png

side_ico_company_01.png

3573 ms

side_ico_company_02.png

side_ico_company_02.png

3475 ms

side_ico_company_03.png

side_ico_company_03.png

3543 ms

side_ico_other_01.png

side_ico_other_01.png

3432 ms

side_ico_other_02.png

side_ico_other_02.png

3646 ms

arrow_link_white.png

arrow_link_white.png

3754 ms

footer_pagetop_character.png

footer_pagetop_character.png

3567 ms

Accessibility Review

u-doctor.com 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-hidden="true"] elements contain focusable descendents

High

[role]s do not have all required [aria-*] attributes

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

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

u-doctor.com 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

u-doctor.com SEO score

92

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 uses legible font sizes

High

Tap targets are not sized appropriately

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 U-doctor.com 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 U-doctor.com 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

u-doctor.com

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