Tools & Wizards About Us
jal.co.jp screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 50% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

jal.co.jp

JAL｜国内線/国際線の航空券・飛行機チケット予約

Page Load Speed

8.2 sec in total

First Response

554 ms

Resources Loaded

7.4 sec

Page Rendered

207 ms

jal.co.jp screenshot

About Website

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

「JAL公式サイト」国内線/国際線の予約・購入、空席・運賃・運航状況の検索ができます。特典航空券やセットでおトクな航空券＋宿泊予約（JALダイナミックパッケージ）の予約・購入もできて、マイルがたまるホテル/レンタカー予約も可能です。

Visit jal.co.jp

Key Findings

We analyzed Jal.co.jp page load time and found that the first response time was 554 ms and then it took 7.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

jal.co.jp performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.4 s

0/100

10%

LCP (Largest Contentful Paint)

Value12.3 s

0/100

25%

SI (Speed Index)

Value19.9 s

0/100

10%

TBT (Total Blocking Time)

Value24,500 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value50.7 s

0/100

10%

Network Requests Diagram

jal.co.jp

554 ms

www.jal.co.jp

2480 ms

category_top.css

1081 ms

perfect-scrollbar.css

350 ms

jquery-ui.custom.css

525 ms

Our browser made a total of 147 requests to load all elements on the main page. We found that 84% of them (124 requests) were addressed to the original Jal.co.jp, 2% (3 requests) were made to B97.yahoo.co.jp and 1% (2 requests) were made to Facebook.com. The less responsive or slowest element that took the longest time to load (2.6 sec) belongs to the original domain Jal.co.jp.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.0 MB (33%)

Content Size

6.1 MB

After Optimization

4.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jal.co.jp main page is 6.1 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. 60% of websites need less resources to load. Images take 3.8 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 193.8 kB

  • Original 227.3 kB
  • After minification 225.7 kB
  • After compression 33.5 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 193.8 kB or 85% of the original size.

Image Optimization

-4%

Potential reduce by 152.0 kB

  • Original 3.8 MB
  • After minification 3.6 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. JAL images are well optimized though.

JavaScript Optimization

-76%

Potential reduce by 995.3 kB

  • Original 1.3 MB
  • After minification 1.1 MB
  • After compression 318.8 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 995.3 kB or 76% of the original size.

CSS Optimization

-79%

Potential reduce by 667.5 kB

  • Original 846.3 kB
  • After minification 814.2 kB
  • After compression 178.8 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. Jal.co.jp needs all CSS files to be minified and compressed as it can save up to 667.5 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 72 (50%)

Requests Now

143

After Optimization

71

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 143 CSS, Javascripts, AJAX and image requests in order to completely render the main page of JAL. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 54 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

jal.co.jp

jal.co.jp

554 ms

www.jal.co.jp

www.jal.co.jp

2480 ms

category_top.css

category_top.css

1081 ms

perfect-scrollbar.css

perfect-scrollbar.css

350 ms

jquery-ui.custom.css

jquery-ui.custom.css

525 ms

completion.css

completion.css

376 ms

jquery.js

jquery.js

863 ms

lodash.js

lodash.js

540 ms

common.js

common.js

384 ms

login.js

login.js

520 ms

categoryTop.js

categoryTop.js

596 ms

insiteSearchInput.js

insiteSearchInput.js

694 ms

cookieManager.js

cookieManager.js

718 ms

Rtoaster.js

Rtoaster.js

784 ms

spBannerControl.js

spBannerControl.js

867 ms

recommendControl.js

recommendControl.js

195 ms

navFooter.js

navFooter.js

187 ms

dom_footer.js

dom_footer.js

241 ms

rtam.js

rtam.js

283 ms

require.js

require.js

679 ms

c

c

1414 ms

logo.png

logo.png

176 ms

bg_arrow_nav_red.png

bg_arrow_nav_red.png

182 ms

bg_arrow_nav_gray.png

bg_arrow_nav_gray.png

194 ms

logo_furusatowari.png

logo_furusatowari.png

228 ms

icon_important.png

icon_important.png

273 ms

head_important-message.gif

head_important-message.gif

349 ms

dom_sx_default_150416b.png

dom_sx_default_150416b.png

731 ms

skynext_de_150416b.png

skynext_de_150416b.png

569 ms

touch_150406b.png

touch_150406b.png

612 ms

img-tickets-thumb001.jpg

img-tickets-thumb001.jpg

447 ms

img-tickets-thumb02.jpg

img-tickets-thumb02.jpg

541 ms

icon_util-s1be6131419.png

icon_util-s1be6131419.png

613 ms

reservation_tab-sa612c4e149.png

reservation_tab-sa612c4e149.png

646 ms

bg_japanmap.png

bg_japanmap.png

691 ms

icon-se98d36910a.png

icon-se98d36910a.png

733 ms

bg_arw.png

bg_arw.png

775 ms

icon_other-se9351620e7.png

icon_other-se9351620e7.png

768 ms

i-travel-parts.png

i-travel-parts.png

819 ms

icon_sns-sedfb8fbb15.png

icon_sns-sedfb8fbb15.png

865 ms

card_blue.jpg

card_blue.jpg

850 ms

sakitoku_arashi_160210m.png

sakitoku_arashi_160210m.png

2617 ms

guide_red.png

guide_red.png

907 ms

bg.png

bg.png

919 ms

bg_arrow_nav_active_red.png

bg_arrow_nav_active_red.png

949 ms

reco.jal.co.jp

reco.jal.co.jp

353 ms

bg_sky.jpg

bg_sky.jpg

985 ms

arw_s_red.png

arw_s_red.png

1003 ms

tag.js

tag.js

8 ms

rtam.gif

rtam.gif

1074 ms

tag

tag

6 ms

skywifi_a_150917b.png

skywifi_a_150917b.png

925 ms

quic-lawson_160201b.png

quic-lawson_160201b.png

757 ms

jalryokoken_151201b.png

jalryokoken_151201b.png

803 ms

smilespring_160114b.png

smilespring_160114b.png

1012 ms

jtb_triplemile_151029b.png

jtb_triplemile_151029b.png

1081 ms

timesale_151029b.png

timesale_151029b.png

1105 ms

DIGITALICE_REC.js

DIGITALICE_REC.js

513 ms

activityi;src=4312258;type=rtg_t715;cat=rtg_t659;ord=6974960647057.742;prd=

activityi;src=4312258;type=rtg_t715;cat=rtg_t659;ord=6974960647057.742;prd=

68 ms

lb

lb

48 ms

fbevents.js

fbevents.js

15 ms

conversion_async.js

conversion_async.js

65 ms

nav.js

nav.js

901 ms

jquery.placeholder.js

jquery.placeholder.js

1037 ms

tab.js

tab.js

1075 ms

fade-image.js

fade-image.js

1115 ms

rtCarousel.js

rtCarousel.js

1177 ms

jmbMemberLoginFrm.js

jmbMemberLoginFrm.js

1201 ms

login-box.js

login-box.js

1222 ms

for-customer-box.js

for-customer-box.js

1245 ms

perfect-scrollbar.js

perfect-scrollbar.js

1296 ms

jquery.mousewheel.js

jquery.mousewheel.js

1348 ms

132 ms

156 ms

reservation-box.js

reservation-box.js

1354 ms

calendarControl.js

calendarControl.js

1361 ms

beacon_call.js

beacon_call.js

99 ms

cs

cs

696 ms

lb

lb

52 ms

63 ms

conversion.js

conversion.js

930 ms

relationalList.js

relationalList.js

1328 ms

pixel

pixel

53 ms

areaSelector.js

areaSelector.js

1373 ms

46 ms

domAirport.js

domAirport.js

1371 ms

beacon

beacon

20 ms

domModule.js

domModule.js

1355 ms

domtourAirport.js

domtourAirport.js

1389 ms

dtDPModuleControl.js

dtDPModuleControl.js

1357 ms

domNearestFare.js

domNearestFare.js

1384 ms

domNearestSelector.js

domNearestSelector.js

1417 ms

jkl-parsexml.js

jkl-parsexml.js

1401 ms

jquery-ui.js

jquery-ui.js

1785 ms

367 ms

conversion.js

conversion.js

712 ms

dom.js

dom.js

1106 ms

inter.js

inter.js

1106 ms

domtour.js

domtour.js

1107 ms

intltour.js

intltour.js

1109 ms

jmb.js

jmb.js

1108 ms

jalcard.js

jalcard.js

1109 ms

807 ms

834 ms

domFare_HND.js

domFare_HND.js

218 ms

skynext_150416n.gif

skynext_150416n.gif

176 ms

jaldp_150416n.gif

jaldp_150416n.gif

190 ms

jalonline_150416n.gif

jalonline_150416n.gif

186 ms

tabitsumi_150416n.gif

tabitsumi_150416n.gif

176 ms

intdp_150415n.gif

intdp_150415n.gif

186 ms

jcfm_150415n.gif

jcfm_150415n.gif

350 ms

easy_150416n.gif

easy_150416n.gif

349 ms

timesale_150416n.gif

timesale_150416n.gif

366 ms

jalg_150416n.gif

jalg_150416n.gif

351 ms

saiyasune_150416n.gif

saiyasune_150416n.gif

361 ms

bargain_150416n.gif

bargain_150416n.gif

376 ms

tabiplus_150416n.gif

tabiplus_150416n.gif

522 ms

mile_150416n.gif

mile_150416n.gif

522 ms

hoken_150612n.gif

hoken_150612n.gif

525 ms

ehotel_150416_2n.gif

ehotel_150416_2n.gif

541 ms

saiyasune_150416n.gif

saiyasune_150416n.gif

552 ms

business_150416n.gif

business_150416n.gif

563 ms

timesale_150416n.gif

timesale_150416n.gif

694 ms

kanko_150416n.gif

kanko_150416n.gif

695 ms

surcharge_150416n.gif

surcharge_150416n.gif

700 ms

milesearch_150416n.gif

milesearch_150416n.gif

721 ms

next-athlete_150416n.gif

next-athlete_150416n.gif

740 ms

executive_150416n.gif

executive_150416n.gif

751 ms

lifemileage_150416n.gif

lifemileage_150416n.gif

867 ms

jalcardnyukai_150416n.gif

jalcardnyukai_150416n.gif

868 ms

shoppingmile_150416n.gif

shoppingmile_150416n.gif

874 ms

tourpremium_150416n.gif

tourpremium_150416n.gif

900 ms

familyprogram_150416n.gif

familyprogram_150416n.gif

927 ms

survice_150416n.gif

survice_150416n.gif

937 ms

jalcardfun_150416n.gif

jalcardfun_150416n.gif

1040 ms

jalhotels_n.gif

jalhotels_n.gif

1041 ms

insurance_150520n.gif

insurance_150520n.gif

1048 ms

tokuyakuten_n.gif

tokuyakuten_n.gif

1079 ms

tokuyakutencloseup_n.gif

tokuyakutencloseup_n.gif

1115 ms

mailnews_150416n.gif

mailnews_150416n.gif

1125 ms

completion.js

completion.js

1042 ms

ScopeSuggest3.0.js

ScopeSuggest3.0.js

1043 ms

HND_SPK.xml

HND_SPK.xml

1072 ms

HND_FUK.xml

HND_FUK.xml

1105 ms

membersroom_150416n.gif

membersroom_150416n.gif

1122 ms

SPK.jpg

SPK.jpg

175 ms

FUK.jpg

FUK.jpg

189 ms

Accessibility Review

jal.co.jp accessibility score

80

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

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

ARIA IDs are not unique

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.

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

jal.co.jp best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

jal.co.jp SEO score

93

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

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    JA

  • Encoding

    SHIFT_JIS

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jal.co.jp 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 Jal.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

jal.co.jp

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