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· 0 checks — Desktop Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

57

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
flux-cdn.com/client/nifty/nifty.min.js300.0 s154.0 KiB
/signals/config/1209868983919302?v=2.9.303&r=stable&domai...1200.0 s128.3 KiB
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
c.amazon-adsystem.com/aax2/apstag.js3600.0 s91.0 KiB
www.nifty.com/_next/static/chunks/framework-de98b93a850cfc71.js86400.0 s58.9 KiB
ads.pubmatic.com/AdServer/js/pwt/158115/2581/pwt.js164320.0 s75.4 KiB
/yomiuri/web/image/20260422055108304_20260421-NFP-GYT1I00...0.0 ms20.8 KiB
secure.cdn.fastclick.net/js/pubcid/latest/pubcid.min.js900.0 s21.7 KiB
script.4dex.io/a/latest/adagio.js1800.0 s19.4 KiB
/yomiuri/web/image/20260422055108324_20260421-NFP-GYT1I00...0.0 ms15.9 KiB
www.google-analytics.com/analytics.js7200.0 s20.9 KiB
www.nifty.com/_next/static/chunks/main-826563c86547f142.js86400.0 s36.5 KiB
www.nifty.com/_next/static/chunks/647-7c3f8414a857c080.js86400.0 s34.2 KiB
/yomiuri/web/image/20260422055108331_20260422-NFP-GYT1I00...0.0 ms12.9 KiB
www.nifty.com/_next/static/chunks/pages/index-6e2569af6dd066af.js86400.0 s29.5 KiB
cdn.browsiprod.com/bootstrap/bootstrap.js3600.0 s14.7 KiB
/yomiuri/web/image/20260422055108340_20260421-NFP-GYT1I00...0.0 ms11.2 KiB
/yomiuri/web/image/20260422055108312_20260422-NFP-GYT1I00...0.0 ms8.7 KiB
www.nifty.com/_next/static/chunks/pages/_app-d73209869a85c64f.js86400.0 s16.6 KiB
www.nifty.com/_next/static/chunks/328-40275ffdecb009b3.js86400.0 s15.3 KiB
tags.crwdcntrl.net/lt/c/16576/sync.min.js86400.0 s13.1 KiB
www.nifty.com/_next/static/chunks/169-081777f95b14384c.js86400.0 s12.9 KiB
rumcdn.geoedge.be/142d0ade-d148-44ad-9a28-172298579d95/grumi-ip.js14400.0 s7.1 KiB
cse.google.com/cse.js?cx=3780ff573e32e48440.0 ms4.3 KiB
www.nifty.com/_next/static/css/ec296d3fe1271954.css86400.0 s9.5 KiB
cdn.browsiprod.com/web-vitals/web-vitals-4.2.3.js0.0 ms2.8 KiB
www.nifty.com/_next/static/chunks/708-d033ff5b7ac03327.js86400.0 s5.8 KiB
www.nifty.com/_next/static/chunks/745-3da54a5ed344b525.js86400.0 s5.3 KiB
cdn.browsiprod.com/abd.js0.0 ms1.9 KiB
config.aps.amazon-adsystem.com/configs/36783600.0 s1.4 KiB
www.google.com/cse/static/style/look/v6/default.css3000.0 s1.2 KiB
www.nifty.com/_next/static/chunks/webpack-3260c5964b595564.js86400.0 s2.5 KiB
d.line-scdn.net/n/line_tag/public/release/v1/lt.js1834626.0 s10.1 KiB
www.google-analytics.com/plugins/ua/linkid.js3600.0 s995 B
www.nifty.com/_next/static/css/be3e45bbc5357cf3.css86400.0 s1.8 KiB
www.nifty.com/_next/static/XNYBA62BZteJxkx7UiA8Y/_buildManifest.js86400.0 s1.1 KiB
www.nifty.com/_next/static/XNYBA62BZteJxkx7UiA8Y/_ssgManifest.js86400.0 s541 B
/tr/?id=1209868983919302&ev=PageView&dl=https%3A%2F%2Fwww...0.0 ms16 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:0.522 source:map[column:186743 line:1 type:source-location url:https://www.nifty.com/_next/static/chunks/framework-de98b93a850cfc71.js urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:46.337 source:map[column:19583 line:0 type:source-location url:https://www.nifty.com/_next/static/chunks/647-7c3f8414a857c080.js urlProvider:network]]]

Each subpart has specific improvement strategies. Ideally, most of the LCP time should be spent on loading the resources, not within delays.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:2226.6260002441404 label:Time to first byte subpart:timeToFirstByte] map[duration:248.02599975585937 label:Resource load delay subpart:resourceLoadDelay] map[duration:680.129 label:Resource load duration subpart:resourceLoadDuration] map[duration:332.085 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-IMG
nodeLabel: 左サイドバナー
path: 1,HTML,1,BODY,22,DIV,2,DIV,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,A,0,IMG
selector: div#contentsTop > div.VerticalBanner_left__RDNtC > a > img
snippet: <img src="https://www.nifty.com/cms_image/niftop/verticalBanner/260421378056/200_625…" width="200" height="625" alt="左サイドバナー" decoding="async">

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG
nodeLabel: 左サイドバナー
path: 1,HTML,1,BODY,22,DIV,2,DIV,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,A,0,IMG
selector: div#contentsTop > div.VerticalBanner_left__RDNtC > a > img
snippet: <img src="https://www.nifty.com/cms_image/niftop/verticalBanner/260421378056/200_625…" width="200" height="625" alt="左サイドバナー" decoding="async">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

More than 4 preconnect connections were found. These should be used sparingly and only to the most important origins.
description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu...5.0 ms

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
ニフティ ゲームズ div.cpn > div.NiftyGamesBanner_area__sNYi3 > a > img
www.nifty.com/cms_image/niftop/niftyGames/250225366780/300_204_nomal.png48.6 KiB38.6 KiB
旅行予約で2％還元 ul.PointPickUp_list__fTyXi > li > a.NiftyPointClubCampaign_item__2C27W > img.NiftyPointClubCampaign_image__JBXmj
/cms_image/niftop/npcPickupFrame/260415377981/230111_jyar...29.2 KiB27.2 KiB
小中学生の95％以上がAIを利用。約9割が違和感手がかりにAI生成コンテンツを認識 li > a.kids_content__qMbWe > div.kids_image__BwT7o > img
kids.nifty.com/cms_image/kids/new-recommend-niftop/260407957952/ai_20260302.jpg21.5 KiB19.5 KiB
左サイドバナー div#contentsTop > div.VerticalBanner_left__RDNtC > a > img
www.nifty.com/cms_image/niftop/verticalBanner/260421378056/200_625_1.png39.3 KiB18.9 KiB
星座を設定する li#splide01-slide02 > div.UranaiDockItem_container__DDlq0 > a.UranaiDockItem_link__1keS2 > span.UranaiDockItem_icon__Vp_5l
www.nifty.com/images/molecules/dock/bg_dock_uranai_130820.png22.7 KiB18.5 KiB
@nifty光 div.HeadInformation_headInformation__ZY__n > div.HeadInformation_inner___6BhJ > a > img
www.nifty.com/cms_image/niftop/topPriority1/260324377753/950_47_b.png25.4 KiB18.1 KiB
コラボ1G div.LeftClmBannerArea_main__1Y3PA > div.LeftClmBannerArea_unit__CTWmv > a > img
www.nifty.com/cms_image/niftop/leftClmBnrArea/260324377755/170_142.png21.8 KiB17.8 KiB
陸自戦車４人死傷、砲弾破裂するまで通常通り射撃か…「普通では考えられない」と隊員ら衝撃 div.MainArticle_newsAreaMainContent__86xbQ > a.MainArticle_mainItem__bqBS2 > figure.MainArticle_mainArticleFigure__1QNIU > img.MainArticle_mainArticleImage__x8c_q
/yomiuri/web/image/20260422055108304_20260421-NFP-GYT1I00...20.3 KiB16.5 KiB
syahoo li#splide01-slide07 > div.DockButtonItem_container__PpMjf > button.DockButtonItem_button__j5EC9 > img.DockButtonItem_image__Xvtmc
/cms_image/niftop/dockFavorite/130819142392/bg_dock_syaho...16.5 KiB16.0 KiB
知らなきゃ損！？マイ ニフティ得する使い方ガイド div.Navigation_leftMenuBanner__UwITD > div.AppBanner_menuBanner__Aed5r > a > img
www.nifty.com/cms_image/niftop/appBanner/240820359896/175x175_1.png20.7 KiB15.7 KiB
右サイドバナー div#contentsTop > div.VerticalBanner_right__KCkgj > a > img
www.nifty.com/cms_image/niftop/verticalBanner/260421378056/200_625_2.png35.6 KiB15.3 KiB
ＡＮＡが国内線「燃油サーチャージ」、２７年度導入検討…燃料高が大幅な収支悪化招くと判断 div.SubArticle_newsAreaSubContent__MJVpO > a.SubArticle_newsAreaSubItem__czz53 > figure.SubArticle_newsAreaSubFigure__Uk9nd > img.SubArticle_newsAreaSubImage__JxUDJ
/yomiuri/web/image/20260422055108324_20260421-NFP-GYT1I00...15.4 KiB14.7 KiB
ニフくじ div.Nifkuji_image__LSyOF > p > a > img
www.nifty.com/images/molecules/nifkuji/logout.png24.3 KiB14.4 KiB
小中学生の63.4％が睡眠不足を自覚。朝スッキリ起きられる人は5.8％ li > a.kids_content__qMbWe > div.kids_image__BwT7o > img
/cms_image/kids/new-recommend-niftop/250701838663/suimin_...15.9 KiB13.9 KiB
li > a > div.NewsAreaItem_contents__ga7_B > img li > a > div.NewsAreaItem_contents__ga7_B > img
www.nifty.com/cms_image/niftop/memberCampaign/260210376589/120_100.png15.4 KiB13.4 KiB
ニフティポイントクラブ div.cpn > div.RightClmPointBanner_banner_area__YKL5M > a.RightClmPointBanner_banner_link__xNcOA > img
/cms_image/niftop/rightClmPointAreaBnr/260421378052/22_30...17.3 KiB12.4 KiB
li > a > div.NewsAreaItem_contents__ga7_B > img li > a > div.NewsAreaItem_contents__ga7_B > img
www.nifty.com/cms_image/niftop/memberCampaign/240627357847/120_100.png14.3 KiB12.4 KiB
全国のサウナ施設の２割超、非常用のボタンを未設置…「扉の開閉に支障」５％ div.SubArticle_newsAreaSubContent__MJVpO > a.SubArticle_newsAreaSubItem__czz53 > figure.SubArticle_newsAreaSubFigure__Uk9nd > img.SubArticle_newsAreaSubImage__JxUDJ
/yomiuri/web/image/20260422055108331_20260422-NFP-GYT1I00...12.4 KiB11.8 KiB
li > a > div.NewsAreaItem_contents__ga7_B > img li > a > div.NewsAreaItem_contents__ga7_B > img
www.nifty.com/cms_image/niftop/memberCampaign/260413377973/120_100.png12.9 KiB11.0 KiB
「後発地震」への備え徹底、「行動変容につながるよう」啓発強化…昨年末は浸透不足が課題に div.SubArticle_newsAreaSubContent__MJVpO > a.SubArticle_newsAreaSubItem__czz53 > figure.SubArticle_newsAreaSubFigure__Uk9nd > img.SubArticle_newsAreaSubImage__JxUDJ
/yomiuri/web/image/20260422055108340_20260421-NFP-GYT1I00...10.7 KiB10.1 KiB
購入金額の2.5％還元 ul.PointPickUp_list__fTyXi > li > a.NiftyPointClubCampaign_item__2C27W > img.NiftyPointClubCampaign_image__JBXmj
/cms_image/niftop/npcPickupFrame/260415377981/bnr_sevenne...11.3 KiB9.5 KiB
【新生活応援】新規お申し込みで最大10,000円割引！ li.NiftyRecommendation_item__9axWU > div.NiftyRecommendation_image__0TFID > a > img
www.nifty.com/cms_image/niftop/promo-edit/260312377432/denki2024_1.png11.3 KiB9.4 KiB
ニフティポイントクラブニフティの日キャンペーン実施中！ li.NiftyRecommendation_item__9axWU > div.NiftyRecommendation_image__0TFID > a > img
www.nifty.com/cms_image/niftop/promo-edit/260312377434/120_100.png9.7 KiB7.8 KiB
バンス米副大統領のパキスタン訪問が保留に、米メディア報道…イランが要求に応じていないことや協議参加を約束していないことが理由 div.SubArticle_newsAreaSubContent__MJVpO > a.SubArticle_newsAreaSubItem__czz53 > figure.SubArticle_newsAreaSubFigure__Uk9nd > img.SubArticle_newsAreaSubImage__JxUDJ
/yomiuri/web/image/20260422055108312_20260422-NFP-GYT1I00...8.2 KiB7.6 KiB
電話で安心・みんなでニフティ限定キャンペーン中 dd.Setsuzoku_bannerArea__ekZV1 > div.CmCampaignBanner_menuBanner__u3jZO > a > img
www.nifty.com/images/molecules/promo/cm_campaign_20240124.png9.0 KiB7.4 KiB
@nifty利用料金が0円になる！？ ul.PointPickUp_list__fTyXi > li > a.NiftyPointClubCampaign_item__2C27W > img.NiftyPointClubCampaign_image__JBXmj
www.nifty.com/cms_image/niftop/npcPickupFrame/260415377981/pointinfo120_100.png9.1 KiB7.2 KiB
ゲームであそんでポイント山分け li.GameArea_item__Wy_qv > p > a > img
/_next/image?url=https%3A%2F%2Fimages.microcms-assets.io%...9.1 KiB7.2 KiB
引っ越し dd.Setsuzoku_bannerArea__ekZV1 > div.HikkoshiBanner_hikkoshiBannerLink__lKwyF > a > img
www.nifty.com/images/molecules/setsuzoku/hikkosi_leftbanner_202402.png7.3 KiB5.6 KiB
kids li#splide01-slide10 > div.DockItem_container__FuH68 > button.DockItem_button__6sDB_ > img.DockItem_image__UqZZV
www.nifty.com/cms_image/niftop/dockFavorite/220715333757/kids_bg_dock_pc.png4.5 KiB4.1 KiB

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
www.nifty.com/pc/styles/search.css?20260414971 B
www.nifty.com/pc/styles/navigation.css694 B
www.nifty.com/pc/styles/favorite.css1.1 KiB
www.nifty.com/pc/styles/globals.css8.2 KiB
www.nifty.com/pc/styles/bnr.css492 B
www.nifty.com/pc/styles/common.css635 B
www.nifty.com/pc/styles/setsuzoku.css1.2 KiB
www.nifty.com/pc/styles/rakuten.css881 B

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 420 ms
URLTime Spent
nifty.com/420 ms
www.nifty.com/0.0 ms

Keep the server response time for the main document short because all other requests depend on it. Learn more about the Time to First Byte metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 963 ms
URLTime Spent
www.nifty.com/1.1 s

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 1.1 MiB
URLTransfer SizeEst Savings
/pagead/managed/js/gpt/m202604160201/pubads_impl.js187.7 KiB128.8 KiB
www.googletagmanager.com/gtag/js?id=AW-847365261&cx=c&gtm=4e64h1147.7 KiB106.7 KiB
cdn.browsiprod.com/sd/apps/middy/middy-desktop-4.59.1414.js97.1 KiB76.6 KiB
www.googletagmanager.com/gtag/js?id=G-Y2VT1N4HPQ&cx=c&_slc=1163.4 KiB69.9 KiB
www.googletagmanager.com/gtag/js?id=G-Q86HJE4WN7&cx=c&gtm=4e64h1169.6 KiB69.5 KiB
/gtm.js?id=GTM-PNMC3ZJ&gtm_auth=&gtm_preview=&gtm_cookies...162.5 KiB68.7 KiB
www.googletagmanager.com/gtag/js?id=G-TC717E9P4D&cx=c&gtm=4e64h1158.7 KiB66.1 KiB
flux-cdn.com/client/nifty/nifty.min.js153.7 KiB65.4 KiB
www.googletagmanager.com/gtag/js?id=G-1J3H2HEV5N&cx=c&gtm=4e64h1157.9 KiB65.0 KiB
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOA.js116.8 KiB64.2 KiB
www.googletagmanager.com/gtag/js?id=AW-847365261147.6 KiB60.3 KiB
/cse/static/element/b33cba5881f68fbf/cse_element__ja.js?u...98.9 KiB47.6 KiB
ads.pubmatic.com/AdServer/js/pwt/158115/2581/pwt.js75.1 KiB46.2 KiB
c.amazon-adsystem.com/aax2/apstag.js90.5 KiB38.8 KiB
fundingchoicesmessages.google.com/i/62532913?ers=368.8 KiB36.5 KiB
/signals/config/1209868983919302?v=2.9.303&r=stable&domai...128.1 KiB36.0 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB33.3 KiB
cse.google.com/adsense/search/async-ads.js43.3 KiB31.5 KiB
www.nifty.com/_next/static/chunks/framework-de98b93a850cfc71.js58.5 KiB22.3 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
www.nifty.com/694 ms9.4 ms0.2 ms
Unattributable584 ms97 ms0.0 ms
www.nifty.com/_next/static/chunks/framework-de98b93a850cfc71.js454 ms335 ms7.5 ms
/pagead/managed/js/gpt/m202604160201/pubads_impl.js341 ms300 ms26 ms
/gtm.js?id=GTM-PNMC3ZJ&gtm_auth=&gtm_preview=&gtm_cookies...281 ms239 ms24 ms
/f/AGSKWxXWzjXxFo7VWv9l_TSpszVOQ-VxPgaaGuNJc63hNfQkXvippY...148 ms78 ms18 ms
c.amazon-adsystem.com/aax2/apstag.js146 ms124 ms14 ms
/signals/config/1209868983919302?v=2.9.303&r=stable&domai...145 ms122 ms21 ms
analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOA.js139 ms99 ms24 ms
www.googletagmanager.com/gtag/js?id=G-TC717E9P4D&cx=c&gtm=4e64h1132 ms94 ms18 ms
flux-cdn.com/client/nifty/nifty.min.js121 ms97 ms20 ms
www.googletagmanager.com/gtag/js?id=G-Q86HJE4WN7&cx=c&gtm=4e64h1107 ms86 ms20 ms
www.googletagmanager.com/gtag/js?id=G-Y2VT1N4HPQ&cx=c&_slc=1106 ms86 ms18 ms
www.googletagmanager.com/gtag/js?id=G-1J3H2HEV5N&cx=c&gtm=4e64h1104 ms85 ms18 ms
fundingchoicesmessages.google.com/i/62532913?ers=3101 ms89 ms11 ms
cdn.browsiprod.com/sd/apps/middy/middy-desktop-4.59.1414.js65 ms48 ms14 ms
connect.facebook.net/en_US/fbevents.js59 ms43 ms15 ms
cse.google.com/cse.js?cx=3780ff573e32e484452 ms36 ms0.4 ms
ads.pubmatic.com/AdServer/js/pwt/158115/2581/pwt.js50 ms39 ms8.8 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation2.5 s
Style & Layout674 ms
Other620 ms
Script Parsing & Compilation403 ms
Rendering78 ms
Garbage Collection71 ms
Parse HTML & CSS66 ms

Many navigations are performed by going back to a previous page, or forwards again. The back/forward cache (bfcache) can speed up these return navigations. Learn more about the bfcache

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failure reasonFailure type
Pages with cache-control:no-store header cannot enter back/forward cache.Actionable
Pages whose main resource has cache-control:no-store cannot enter back/forward cache.Not actionable
Back/forward cache is disabled because some JavaScript network request received resource with Cache-Control: no-store header.Not actionable

Minifying CSS files can reduce network payload sizes. Learn how to minify CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 4.9 KiB
URLTransfer SizeEst Savings
www.google.com/cse/static/element/b33cba5881f68fbf/default_v6+ja.css9.7 KiB2.8 KiB
www.nifty.com/pc/styles/globals.css8.2 KiB2.1 KiB

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 14.1 KiB
URLTransfer SizeEst Savings
.fc-consent-root .fc-dialog-container.fc-fullscreen { height: 100% !important; … } …16.2 KiB14.1 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/pagead/managed/js/gpt/m202604160201/pubads_impl.js187.7 KiB
www.googletagmanager.com/gtag/js?id=G-Q86HJE4WN7&cx=c&gtm=4e64h1169.6 KiB
/gtm.js?id=GTM-PNMC3ZJ&gtm_auth=&gtm_preview=&gtm_cookies...163.5 KiB
www.googletagmanager.com/gtag/js?id=G-Y2VT1N4HPQ&cx=c&_slc=1163.4 KiB
www.googletagmanager.com/gtag/js?id=G-TC717E9P4D&cx=c&gtm=4e64h1158.7 KiB
www.googletagmanager.com/gtag/js?id=G-1J3H2HEV5N&cx=c&gtm=4e64h1158.0 KiB
flux-cdn.com/client/nifty/nifty.min.js154.0 KiB
www.googletagmanager.com/gtag/js?id=AW-847365261&cx=c&gtm=4e64h1147.7 KiB
www.googletagmanager.com/gtag/js?id=AW-847365261147.7 KiB
/signals/config/1209868983919302?v=2.9.303&r=stable&domai...128.3 KiB

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits
●Optimize DOM size
●Modern HTTP
●Optimize viewport for mobile
●Minify JavaScript
●User Timing marks and measures 30 user timings
●Avoid long main-thread tasks 20 long tasks found
●Image elements have explicit `width` and `height`
●Network Requests
●Network Round Trip Times 240 ms
●Server Backend Latencies 920 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Avoid large layout shifts 2 layout shifts found
○INP breakdown
○Avoid non-composited animations
88

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
partners div.CookieConsent > div > span.CookieConsents_message__fiuvc > a
Learn more div.CookieConsent > div > span.CookieConsents_message__fiuvc > a
お客様情報 ul > li > span.HeaderItems_userData__0JsM4 > a
注目ニュース div#yomiuriNews > div.YomiuriNews_newsAreaNavi__bFvH1 > p.YomiuriNews_newsAreaNaviHeading__h6ZJw > b
キャンペーン a > div.NewsAreaItem_contents__ga7_B > div.NewsAreaItem_text__c8h_Z > div.NewsAreaItem_label__ce2k_
キャンペーン a > div.NewsAreaItem_contents__ga7_B > div.NewsAreaItem_text__c8h_Z > div.NewsAreaItem_label__ce2k_
キャンペーン a > div.NewsAreaItem_contents__ga7_B > div.NewsAreaItem_text__c8h_Z > div.NewsAreaItem_label__ce2k_
Learn more div.fc-dialog-content > div.fc-dialog-scrollable-content > button.fc-faq-header > span.fc-faq-label
List of partners. div.fc-dialog-scrollable-content > div.fc-footer > p > a.fc-vendors-list-dialog

These are opportunities to improve the legibility of your content.

Tables and lists

When definition lists are not properly marked up, screen readers may produce confusing or inaccurate output. Learn how to structure definition lists correctly.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ニフティのサービス プロバイダーサービス NifMo NifMo 法人サービス セキュリティ対策 ニフティふるさと納税 法人向けサービス div.Navigation_serviceNavArea__z_u_e > div.Setsuzoku_ourServicesArea__JFiXq > div.Setsuzoku_ourServicesDList__lQDKV > dl

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Internationalization and localization

If a page doesn't specify a `lang` attribute, a screen reader assumes that the page is in the default language that the user chose when setting up the screen reader. If the page isn't actually in the default language, then the screen reader might not announce the page's text correctly. Learn more about the `lang` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html html

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

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Go to page 1 div#splide01 > ul.splide__pagination > li > button.splide__pagination__page
利用料金「0円チャレンジ」とは？ ul.RightClmPointArea_dot__fzwrk > li > p > a
貯めたポイントを1.5倍にする ul.RightClmPointArea_dot__fzwrk > li > p > a
@nifty会員限定！ポイントUP ul.RightClmPointArea_dot__fzwrk > li > p > a
@nifty auひかり section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
v6高速10ギガプラン section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
@nifty MAX光 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
@nifty v6サービス section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
安心・安全のニフティ section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
@nifty 紹介特典 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
会員向けサービス section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
@nifty まかせて365 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
まかせて365リモート入口 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
常時安全セキュリティ24 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
@nifty みやブル section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
@nifty VPN wifi section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
帝国データバンク section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
新聞記事横断検索 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
ゼンリン住宅地図 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
日経テレコン21 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
ビジネスデータ section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
天気予報 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
IT小ネタ帳 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
エンジニアブログ section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
お楽しみマガジン section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
ニフティポイントクラブ section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
ニフティふるさと納税 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
ニフティ温泉 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
ニフティ不動産 section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
アクションチャンネル section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
ミステリーチャンネル section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
ブログサービス：ココログ section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a
インターポット（箱庭） section.FooterServiceList_col__H7mwr > ul.FooterServiceList_dot__4_TyH > li > a

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Prev div.DockList_Inner__ZrmkJ > div#splide01 > div.splide__arrows > button.splide__arrow
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
●`[role]`s are contained by their required parent element
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Definition list items are wrapped in `<dl>` elements
●Document has a `<title>` element
●Links are distinguishable without relying on color.
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
●Image elements do not have `[alt]` attributes that are redundant text.
●Identical links have the same purpose.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has a valid value for its `[lang]` attribute
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
73

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLAspect Ratio (Displayed)Aspect Ratio (Actual)
ニフティふるさと納税_image div.Setsuzoku_menuButton__4vzGf > a.Setsuzoku_textIconLink__CmXRg > span.Setsuzoku_icon__3ug0A > img
www.nifty.com/images/molecules/setsuzoku/icon-furusato.png12 x 13 (0.92)43 x 28 (1.54)

General

Deprecated APIs will eventually be removed from the browser. Learn more about deprecated APIs.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
Topics
flux-cdn.com/client/nifty/nifty.min.js line 1, col 11138
AttributionReporting
connect.facebook.net/en_US/fbevents.js line 279, col 769

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.nifty.com/
Access to fetch at 'https://hb.adingo.jp/prebid?dfpUnitCode=%2F48012543%2FNIFTY_PC%2FTOP%2FFBNR&tagId=35306%3A1000300274&groupId=1000146974' from origin 'https://www.nifty.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
www.nifty.com/
Access to fetch at 'https://hb.adingo.jp/prebid?dfpUnitCode=%2F48012543%2FNIFTY_PC%2FTOP%2FRECT_2nd&tagId=35306%3A1000300276&groupId=1000146974' from origin 'https://www.nifty.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
www.nifty.com/
Access to fetch at 'https://hb.adingo.jp/prebid?dfpUnitCode=%2F48012543%2FNIFTY_PC%2FTOP%2FRECT&tagId=35306%3A1000300275&groupId=1000146974' from origin 'https://www.nifty.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
/prebid?dfpUnitCode=%2F48012543%2FNIFTY_PC%2FTOP%2FRECT_2...
Failed to load resource: net::ERR_FAILED
/prebid?dfpUnitCode=%2F48012543%2FNIFTY_PC%2FTOP%2FFBNR&t...
Failed to load resource: net::ERR_FAILED
/prebid?dfpUnitCode=%2F48012543%2FNIFTY_PC%2FTOP%2FRECT&t...
Failed to load resource: net::ERR_FAILED
gacraft.jp/prebid-v3/flux_nifty
Failed to load resource: the server responded with a status of 400 ()
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
92

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
www.nifty.co.jp/privacy/Learn more

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

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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