Latest public test screenshot

https://www.amazon.co.uk/

See the website health and performance test results for https://www.amazon.co.uk/, including status code, load speed, SSL, WHOIS, DNS, console logs, Chrome UX Report, resource sizes, and Pagespeed findings.

Tested on 25 May 2026 21:47:04.

New test

Up
  • HTTP status 200
  • Response time 663 ms
  • Document load time 0 ms
  • Full page load time 0 ms
  • Document size 0 B
  • Full page size 0 B
58/100
  • Mobile score 58
  • Desktop score 82

Observer's Performance Suggestions

Priority actions Observer identified from this test to improve speed, reliability, and user experience.

Mobile score is 24 points lower than desktop
Warning High

Desktop scores 82/100 but mobile only 58/100. Optimize for mobile CPU, network and viewport — most real-world traffic is mobile. Read more

Domain transfer lock is not enabled
Warning Medium

The domain has neither clientTransferProhibited nor serverTransferProhibited status, which means it could be transferred to another registrar without additional safeguards. Enable transfer lock through your registrar to prevent unauthorized transfers. Read more

Desktop performance needs improvement (82/100)
Warning Medium

Score is below 90. Tackle the highest-impact audits to push into the green. Read more

Mobile performance needs improvement (58/100)
Warning Medium

Score is below 90. Tackle the highest-impact audits to push into the green. Read more

High Total Blocking Time (214 ms)
Warning Medium

Long JavaScript tasks block the main thread, making the page feel unresponsive. Split long tasks, defer non-critical scripts, and reduce third-party JavaScript. Read more

Slow Speed Index (4.6 s)
Warning Medium

The page takes too long to visually complete. Optimize critical rendering path, reduce render-blocking resources, and serve visible content first. Read more

Fewer than 75% of users have a good Cumulative Layout Shift
Warning Medium

Only 72% of real-user samples fall in the "good" bucket for Cumulative Layout Shift. Read more

LCP image resource load is slow
Warning Medium

The p75 LCP image resource load delay is 923 ms. Optimize image delivery with a CDN, caching, or smaller formats to reduce load time. Read more

LCP image TTFB is slow
Warning Medium

The p75 LCP image time-to-first-byte is 517 ms. Use a faster origin server, CDN, or preconnect hints to reduce initial response time. Read more

Reduce unused JavaScript
Info Medium

Strip JavaScript that the page does not use to reduce parse and download time. Read more

Only the top 10 of 11 suggestions are shown in the public test. To see all recommendations and track every change on your website, register now.

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16 Jan 2027

230 days left

Whois

Registrar
Amazon.com, Inc. [Tag = AMAZON-COM]

SSL

SSL available
Yes
SSL status
valid
Issuer
C=US,O=Amazon,CN=Amazon RSA 2048 M04
Subject
CN=www.amazon.co.uk
TLS version
TLSv1.3
Self-signed
No
Valid until
16 Jan 2027

DNS Records

Current DNS records returned for this domain at the time of the test.

DNS status
resolved
  • 18.165.62.8
  • 2600:9000:2467:2600:15:c9dc:596:d01
  • 2600:9000:2467:3a00:15:c9dc:596:d01
  • 2600:9000:2467:3c00:15:c9dc:596:d01
  • 2600:9000:2467:7200:15:c9dc:596:d01
  • 2600:9000:2467:d000:15:c9dc:596:d01
  • 2600:9000:2467:d600:15:c9dc:596:d01
  • 2600:9000:2467:ec00:15:c9dc:596:d01
  • 2600:9000:2467:f800:15:c9dc:596:d01
  • tp.bfbdc3ca1-frontier.amazon.co.uk
  • amazon-smtp.amazon.com
  • ns-1256.awsdns-29.org
  • ns-1689.awsdns-19.co.uk
  • ns-430.awsdns-53.com
  • ns-558.awsdns-05.net
  • MS=ms12314789
  • MS=ms45048758
  • ZOOM_verify_3Ko9ExAfA3lpXCh9QPR15B
  • adobe-idp-site-verification=b6bcd3e5aaffc63607c8bf75744d9a0d1febc50dd7f389428e2ae476c9ba8814
  • atlassian-domain-verification=ZT4AapXgobCpXIWoNcd7gtMjZyOUdr4EDFMnFUWrqqqgdaQVbDvoGpRaIwj/tgPH
  • autodesk-domain-verification=9bCtBBfcSX131DnPfMqz
  • box-domain-verification=ffea95cd0e0d61c302198367155b07e74fd534fa1d867662dc9bf9969b6f535d
  • canva-site-verification=FSBzoxF2qUazDMl38A7ESw
  • cisco-ci-domain-verification=2d2409c79bc50c72151404f511810173a1d51f0721e3f7090b2dcda39aa3a7f1
  • cisco-ci-domain-verification=7efb722588ec060653fa68cb28b9206879d3abc91ffab361fd37cedf44bebfe7
  • docker-verification=b640e25c-e841-4505-9fa7-160d642dca15
  • facebook-domain-verification=s683te1vv3i7f7c7fbq4ps45yxkt6l
  • google-gws-recovery-domain-verification=68063740
  • google-gws-recovery-domain-verification=70440345
  • google-site-verification=6t-dcIVf42O-EoNSfBL2kWoN33DKL83FokcApn7S2us
  • google-site-verification=g_bTkCPIdl9j6VSKKAfoQl12ZHKgvAk0X3lwzUqu1fM
  • google-site-verification=lVzfHahZqH9Fqj0vAsjH_J5ee3Zewa0CMgaj6Tqixxg
  • liveramp-site-verification=jZJKgMEQ_1mdjMhKj02iqNACZ-NJHRWhCEQdQ_OuCMo
  • sending_domain1003771=503f4d4816370d2e5c2f06087d972e8c76d700ddf473e8976f7e72f6e4940089
  • sending_domain1003771=6d479c2e18f1858893f5c32bf9908c9b085932a84541ee85c8d873ed7f24b83f
  • sending_domain229492=2712d9f9a3a3adcb0285c54b3ea3cb718a69130fc0ddfa34cc74dcefe396f31a
  • sending_domain229492=bc19ba09b42dbc12618ad5755af2606329fa3a20ca423a330779fb5cfa0e71ce
  • sending_domain608861=81f88310c30e2fee703ed330cd919efe1f70cb299998749208d381707f584c8c
  • sending_domain608861=d7e8b07477dfc929c3eaf73f3d87d52b876cb7ceaaf93c6213319abf8120b52e
  • spf2.0/pra include:amazon.com -all
  • stripe-verification=8E217BE0FF12B50596BD78EEA3F81E62C6C7A2AC78FBD46DAD95B7D21BA2F8BF
  • v=spf1 include:amazon.com -all

Resource Summary

Transfer size share of the tested page split by resource type.

Total 10.15 MB 123 requests 100% of total size
Media 7.82 MB 4 requests 77% of total size
Font 727.96 KB 21 requests 7.0% of total size
Script 598.24 KB 31 requests 5.8% of total size
Image 541.77 KB 40 requests 5.2% of total size
Document 380.43 KB 2 requests 3.7% of total size
Stylesheet 91.02 KB 11 requests 0.9% of total size
Other 51.57 KB 14 requests 0.5% of total size
Third-party 10.15 MB 123 requests 100% of total size

Core Web Vitals

Key performance signals from Lighthouse, with color-coded status for what is healthy and what still needs work.

Good Time to First Byte 603 ms

The server starts responding quickly.

Poor First Contentful Paint 4.23 s

Users wait too long before any content appears.

Poor Largest Contentful Paint 8.17 s

Main visible content takes too long to appear.

Requires improvement Cumulative Layout Shift 0.10

Some layout movement still affects the experience.

Requires improvement Speed Index 4.55 s

Visual progress is slower than recommended.

Requires improvement Total Blocking Time 214 ms

Script execution still delays interactivity.

Poor Max Potential FID 301 ms

Potential input delay is high.

Poor Time to Interactive 8.41 s

Users wait too long before the page responds.

TTFB 603 ms
FCP 4.23 s
LCP 8.17 s
TTI 8.41 s

Loading Filmstrip

Visual loading progress from the Lighthouse run, shown in time order.

Mobile filmstrip frame at 742 ms
742 ms
Mobile filmstrip frame at 1.48 s
1.48 s
Mobile filmstrip frame at 2.23 s
2.23 s
Mobile filmstrip frame at 2.97 s
2.97 s
Mobile filmstrip frame at 3.71 s
3.71 s
Mobile filmstrip frame at 4.45 s
4.45 s
Mobile filmstrip frame at 5.19 s
5.19 s
Mobile filmstrip frame at 5.93 s
5.93 s

Google Pagespeed Insights

Switch between desktop and mobile Lighthouse results to review the latest performance findings for this page.

Mobile 58
Desktop 82

Audit Details

Audit Insight Impact
Network dependency tree

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.

Open
Layout shift culprits

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

Open
Render-blocking requests

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.

  • https://m.media-amazon.com/images/I/21NZdO3uFtL.js?AUIClients/GWMMetricsJS#isWindowDisplay-true
  • https://m.media-amazon.com/images/I/11J1WJh9jNL.js?AUIClients/PRIVCONAssets-stub
  • https://m.media-amazon.com/images/I/11i1DYEiaoL._RC%7C01GaLSH4siL.css,51fMLkDdAPL.css,31PB9QRnzoL.css,21P+RTdWkDL.css,01e1eMxIAQL.css,0168Xo81wHL.css,31VtExXv3+L.css,11F5ACe4x7L.css,01xgFoPPxUL.css,117EdbGaSuL.css,11FLKjqFRuL.css,01IdKcBuAdL.css,01hTMdPgumL.css,01wLsDqViEL.css,01eVBHHaY+L.css,21WrwlMHONL.css,01jkMCAjwTL.css,51uku6rqJZL.css,01HWrzt-WgL.css,012dON--upL.css,3103L-rGdyL.css,01rsZA1PN5L.css,01XXL3mUnDL.css,212pFGU72UL.css,11TJIgpJkHL.css,21Z-N1VMkDL.css,01xVZWT0v7L.css,21Qw4B-W3oL.css,317ZAmYhF8L.css,01i092IYHUL.css,01oaPOLX+-L.css,31Xidrwy+iL.css,01qCtwM+r7L.css,11aGFFEVKYL.css,216fk13NCyL.css,11pcYOFpaDL.css,11ddP9TgqIL.css,012AAxUFVLL.css,21wNb8yRp+L.css,21BV5fnO7DL.css,11rQcpDZUeL.css,21ndCL-LT7L.css,11Bxyo5uU-L.css,21x35f-9xIL.css,11df7YrgiKL.css,01890+Vwk8L.css,21nC4lb4-2L.css,11txQ3I54VL.css,01qiwJ7qDfL.css,21HoRJ2tacL.css,016mfgi+D2L.css,01YtoGGCCuL.css,31qEvho-gRL.css,11RUQUwVPJL.css,21CPPF48ThL.css,01++tYIiyML.css,01nOZ8FJ+WL.css_.css?AUIClients/AmazonUI#mobile.gb.not-trident
  • https://m.media-amazon.com/images/I/519BmQqgMCL._RC%7C41EAJHyHKPL.css,01FcI3FsaiL.css,31X9kJ6OojL.css_.css?AUIClients/RetailSearchAutocompleteAssets#mobile
  • https://m.media-amazon.com/images/I/51w2a37BRdL._RC%7C51waPb-h-9L.css,51to0n6xYnL.css_.css?AUIClients/NavMobileAssets-all#778344-T1.1403880-T3.1323989-T1
Est savings of 1,920 ms
Minimize main-thread work

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

4.5 s
LCP request discovery

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

Open
Avoid large layout shifts

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

  • Video Player is loading. Cosy home accessories Discover now Battery-powered sec…
  • Video Player is loading. Cosy home accessories Discover now Battery-powered sec…
  • Video Player is loading. Cosy home accessories Discover now Battery-powered sec…
  • Video Player is loading. Cosy home accessories Discover now Battery-powered sec…
  • Video Player is loading. Cosy home accessories Discover now Battery-powered sec…
7 layout shifts found
LCP breakdown

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

Open
Reduce unused JavaScript

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

  • https://m.media-amazon.com/images/I/91u1iWIbVEL.js?AUIClients/VideoJsCardsBuzz Potential savings: 117.79 KB
  • https://m.media-amazon.com/images/I/11I0WXrZVoL._RC%7C11Y+5x+kkTL.js,51DFoGfFeXL.js,115zbyk371L.js,11GgN1+C7hL.js,313nCSj5srL.js,01VRMV3FBdL.js,21NadQlXUWL.js,01E8f3KV-NL.js,31on-La90vL.js,11a7qqY8xXL.js,11PZSUl3FLL.js,51C4kaFbiAL.js,11J9B4cvO1L.js,11wb9K3sw0L.js,11BrgrMAHUL.js,11GPhx42StL.js,210X-JWUe-L.js,01Svfxfy8OL.js,61l8joIYJhL.js,01ikBbTAneL.js,31v298o2m6L.js,319aVrJ-hdL.js,31CsANL5ynL.js,11F929pmpYL.js,31mosk8yNCL.js,01qkmZhGmAL.js,31rqCOnXDNL.js,011FfPwYqHL.js,21Xgf5G-ZWL.js,21sqSVZyapL.js,21kN0q4IA-L.js,21HZlWnI+gL.js,11vb6P5C5AL.js,01yeWhVNdxL.js_.js?AUIClients/AmazonUI Potential savings: 66.92 KB
  • https://m.media-amazon.com/images/I/813oc2vlx2L._RC%7C31UBFcbo1CL.js,01wcltxKR5L.js,41FbfgEBSXL.js_.js?AUIClients/QTipsMobileWebAssets Potential savings: 35.39 KB
  • https://m.media-amazon.com/images/I/01V50JopleL._RC%7C01kC46b9vjL.js,81byURGFvpL.js_.js?AUIClients/RetailSearchAutocompleteAssets Potential savings: 28.72 KB
  • https://m.media-amazon.com/images/I/81kCF8wuZEL.js?AUIClients/FWCIMAssets Potential savings: 24.07 KB
Est savings of 273 KiB
Reduce JavaScript execution time

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.

  • https://www.amazon.co.uk/
  • https://m.media-amazon.com/images/I/11I0WXrZVoL._RC%7C11Y+5x+kkTL.js,51DFoGfFeXL.js,115zbyk371L.js,11GgN1+C7hL.js,313nCSj5srL.js,01VRMV3FBdL.js,21NadQlXUWL.js,01E8f3KV-NL.js,31on-La90vL.js,11a7qqY8xXL.js,11PZSUl3FLL.js,51C4kaFbiAL.js,11J9B4cvO1L.js,11wb9K3sw0L.js,11BrgrMAHUL.js,11GPhx42StL.js,210X-JWUe-L.js,01Svfxfy8OL.js,61l8joIYJhL.js,01ikBbTAneL.js,31v298o2m6L.js,319aVrJ-hdL.js,31CsANL5ynL.js,11F929pmpYL.js,31mosk8yNCL.js,01qkmZhGmAL.js,31rqCOnXDNL.js,011FfPwYqHL.js,21Xgf5G-ZWL.js,21sqSVZyapL.js,21kN0q4IA-L.js,21HZlWnI+gL.js,11vb6P5C5AL.js,01yeWhVNdxL.js_.js?AUIClients/AmazonUI
  • Unattributable
  • https://m.media-amazon.com/images/I/91u1iWIbVEL.js?AUIClients/VideoJsCardsBuzz
  • https://m.media-amazon.com/images/I/11MgFhkox0L.js?xcp
1.9 s
Font display

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.

  • https://m.media-amazon.com/images/S/sash/gyrV-mLs7VcgiFC.woff2
  • https://m.media-amazon.com/images/S/sash/2SazJx$EeTHfhMN.woff2
  • https://m.media-amazon.com/images/S/sash/ozb5-CLHQWI6Soc.woff2
  • https://m.media-amazon.com/images/S/sash/pnZF3$c0rgepEUt.woff2
  • https://m.media-amazon.com/images/S/sash/8AuIu4whVB5EMoJ.woff2
Est savings of 50 ms
Largest Contentful Paint

Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric

8.2 s
First Contentful Paint

First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric.

4.2 s
Max Potential First Input Delay

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.

300 ms
Time to Interactive

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.

8.4 s
Reduce unused CSS

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.

  • https://m.media-amazon.com/images/I/11i1DYEiaoL._RC%7C01GaLSH4siL.css,51fMLkDdAPL.css,31PB9QRnzoL.css,21P+RTdWkDL.css,01e1eMxIAQL.css,0168Xo81wHL.css,31VtExXv3+L.css,11F5ACe4x7L.css,01xgFoPPxUL.css,117EdbGaSuL.css,11FLKjqFRuL.css,01IdKcBuAdL.css,01hTMdPgumL.css,01wLsDqViEL.css,01eVBHHaY+L.css,21WrwlMHONL.css,01jkMCAjwTL.css,51uku6rqJZL.css,01HWrzt-WgL.css,012dON--upL.css,3103L-rGdyL.css,01rsZA1PN5L.css,01XXL3mUnDL.css,212pFGU72UL.css,11TJIgpJkHL.css,21Z-N1VMkDL.css,01xVZWT0v7L.css,21Qw4B-W3oL.css,317ZAmYhF8L.css,01i092IYHUL.css,01oaPOLX+-L.css,31Xidrwy+iL.css,01qCtwM+r7L.css,11aGFFEVKYL.css,216fk13NCyL.css,11pcYOFpaDL.css,11ddP9TgqIL.css,012AAxUFVLL.css,21wNb8yRp+L.css,21BV5fnO7DL.css,11rQcpDZUeL.css,21ndCL-LT7L.css,11Bxyo5uU-L.css,21x35f-9xIL.css,11df7YrgiKL.css,01890+Vwk8L.css,21nC4lb4-2L.css,11txQ3I54VL.css,01qiwJ7qDfL.css,21HoRJ2tacL.css,016mfgi+D2L.css,01YtoGGCCuL.css,31qEvho-gRL.css,11RUQUwVPJL.css,21CPPF48ThL.css,01++tYIiyML.css,01nOZ8FJ+WL.css_.css?AUIClients/AmazonUI#mobile.gb.not-trident Potential savings: 51.4 KB
  • ._interactive-footer-card_style_container__3GKmA{grid-gap:8px;display:grid;gap:8px; … } … Potential savings: 22.21 KB
  • ._quad-category-card_fluid_fluidCard__3hmFA{-webkit-box-orient:vertical; … } … Potential savings: 21.56 KB
  • ._multi-category-card_style_container__3HW_J{grid-gap:8px;display:grid;gap:8px; … } … Potential savings: 21.54 KB
  • ._sign-in-v2_style_heading__1mnEu{font-size:20px} … Potential savings: 18.65 KB
Est savings of 193 KiB
Use efficient cache lifetimes

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

  • https://www.amazon.co.uk/rd/uedata?rid=C90K6MQ4D2SZ3FMA8FW9&sid=524-4358008-2543311&rx=D6A56WJ2i+Cfm/+KhUkzMRw0ItSyuIPVn35Hw3OK7JU Potential savings: 676 B
  • https://fls-eu.amazon.co.uk/1/batch/1/OP/A1F83G8C2ARO7P:524-4358008-2543311:C90K6MQ4D2SZ3FMA8FW9$uedata=s:%2Frd%2Fuedata%3Fstaticb%26id%3DC90K6MQ4D2SZ3FMA8FW9:0 Potential savings: 195 B
  • https://fls-eu.amazon.co.uk/1/batch/1/OP/A1F83G8C2ARO7P:524-4358008-2543311:C90K6MQ4D2SZ3FMA8FW9$uedata=s:%2Frd%2Fuedata%3Fld%26v%3D0.347302.0%26id%3DC90K6MQ4D2SZ3FMA8FW9%26sw%3D412%26sh%3D823%26vw%3D412%26vh%3D823%26m%3D1%26sc%3DC90K6MQ4D2SZ3FMA8FW9%26ue%3D4%26bb%3D62%26ns%3D100%26ne%3D106%26cf%3D187%26af%3D208%26fn%3D208%26be%3D364%26fp%3D234%26fcp%3D234%26pc%3D2700%26tc%3D-618%26na_%3D-618%26ul_%3D-1779745589130%26_ul%3D-1779745589130%26rd_%3D-1779745589130%26_rd%3D-1779745589130%26fe_%3D-618%26lk_%3D-618%26_lk%3D-618%26co_%3D-618%26_co%3D-618%26sc_%3D-1779745589130%26rq_%3D-618%26rs_%3D-29%26_rs%3D-29%26dl_%3D-23%26di_%3D406%26de_%3D406%26_de%3D406%26_dc%3D2699%26ld_%3D2700%26_ld%3D-1779745589130%26ntd%3D-1%26ty%3D0%26rc%3D0%26hob%3D2%26hoe%3D4%26ld%3D2702%26t%3D1779745591832%26ctb%3D1%26rt%3Dcf%3A24-4-11-9-1-12-0_af%3A24-4-11-9-1-12-0_ld%3A76-26-11-28-4-29-0%26csmtags%3Daui%7Caui%3Aaui_build_date%3A3.26.5-2026-05-20%7CgwImgNoCached%7CFWCIMEnabled%7Cfls-eu-amazon-co-uk%7Ccf_cdn_fr%7Ccf_cdn_mp%7Cadblk_no%7CgwmNoCardHistory%7ChpWDHasJrs%3Afalse%7Caui%3Acss%3Anetwork%7Caui%3Ajs%3Anetwork%7Cawa%3Awebsite%7Cawa%3Awpn%3Aunsupported%7Cawa%3Awpn%3Aunsupported%3Asw_no_ctlr%7Caui%3Aajax%7Caui%3Asw%3Apage_proxy%3Ano_ctrl%26viz%3Dvisible%3A4%26pty%3Dgateway-phone-web%26spty%3Dmobile%26pti%3Dmobile%26tid%3DC90K6MQ4D2SZ3FMA8FW9%26aftb%3D1%26lob%3D1:2726 Potential savings: 195 B
  • https://fls-eu.amazon.co.uk/1/batch/1/OP/A1F83G8C2ARO7P:524-4358008-2543311:C90K6MQ4D2SZ3FMA8FW9$uedata=s:%2Frd%2Fuedata%3Fld%26v%3D0.347302.0%26id%3DC90K6MQ4D2SZ3FMA8FW9%26sc0%3Daui%3Asw%3Appft%3Acallback_ricb%26bb0%3D50%26pc0%3D1224%26ld0%3D1224%26t0%3D1779745590354%26sc1%3Dgwm-head-aui-assets%26bb1%3D60%26cf1%3D60%26pc1%3D61%26ld1%3D61%26t1%3D1779745589191%26sc2%3Dportal-bb%26pc2%3D8%26ld2%3D8%26t2%3D1779745589201%26sc3%3Dlg%26af3%3D210%26pc3%3D210%26ld3%3D210%26t3%3D1779745589340%26sc4%3Dgwm%26af4%3D225%26pc4%3D225%26ld4%3D225%26t4%3D1779745589355%26sc5%3DcsmCELLSframework%26bb5%3D368%26pc5%3D368%26ld5%3D368%26t5%3D1779745589498%26sc6%3DcsmCELLSpdm%26bb6%3D368%26pc6%3D369%26ld6%3D369%26t6%3D1779745589499%26sc7%3DcsmCELLSvpm%26bb7%3D369%26pc7%3D369%26ld7%3D369%26t7%3D1779745589499%26sc8%3DcsmCELLSfem%26bb8%3D370%26pc8%3D370%26ld8%3D370%26t8%3D1779745589500%26sc9%3Due_sushi_v1%26bb9%3D370%26pc9%3D371%26ld9%3D371%26t9%3D1779745589501%26sc10%3Dinteractivity%26cf10%3D427%26pc10%3D427%26ld10%3D427%26t10%3D1779745589557%26sc11%3DcentralizedConsentBanner%26bb11%3D525%26pc11%3D851%26ld11%3D852%26t11%3D1779745589982%26sc12%3Dcard-load-1%26bb12%3D584%26cf12%3D796%26pc12%3D807%26ld12%3D807%26t12%3D1779745589937%26sc13%3Dgwm-loading-indicator-1%26bb13%3D584%26pc13%3D808%26ld13%3D808%26t13%3D1779745589938%26sc14%3Dglow-toaster-api-timer-MOBILE%26bb14%3D739%26pc14%3D1403%26ld14%3D1403%26t14%3D1779745590533%26sc15%3Dwebsite%26pc15%3D750%26ld15%3D750%26t15%3D1779745589880%26sc16%3Dwpn%3Aunsupported%26pc16%3D754%26ld16%3D754%26t16%3D1779745589884%26sc17%3Dwpn%3Aunsupported%3Asw_no_ctlr%26pc17%3D755%26ld17%3D755%26t17%3D1779745589885%26sc18%3Dcard-load-2%26bb18%3D810%26cf18%3D1175%26pc18%3D1192%26ld18%3D1192%26t18%3D1779745590322%26sc19%3Dgwm-loading-indicator-2%26bb19%3D810%26pc19%3D1193%26ld19%3D1193%26t19%3D1779745590323%26ctb%3D1:2728 Potential savings: 195 B
  • https://fls-eu.amazon.co.uk/1/batch/1/OP/A1F83G8C2ARO7P:524-4358008-2543311:C90K6MQ4D2SZ3FMA8FW9$uedata=s:%2Frd%2Fuedata%3Fld%26v%3D0.347302.0%26id%3DC90K6MQ4D2SZ3FMA8FW9%26ctb%3D1%26sc0%3DtempPageLoaded%26cf0%3D2761%26pc0%3D2761%26ld0%3D2761%26t0%3D1779745591891%26pty%3Dgateway-phone-web%26spty%3Dmobile%26pti%3Dmobile%26tid%3DC90K6MQ4D2SZ3FMA8FW9%26aftb%3D1%26lob%3D1:2763 Potential savings: 195 B
Est savings of 3 KiB
Legacy JavaScript

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

  • https://m.media-amazon.com/images/I/01V50JopleL._RC%7C01kC46b9vjL.js,81byURGFvpL.js_.js?AUIClients/RetailSearchAutocompleteAssets Potential savings: 42.55 KB
  • https://m.media-amazon.com/images/I/813oc2vlx2L._RC%7C31UBFcbo1CL.js,01wcltxKR5L.js,41FbfgEBSXL.js_.js?AUIClients/QTipsMobileWebAssets Potential savings: 34.91 KB
  • https://m.media-amazon.com/images/I/81kCF8wuZEL.js?AUIClients/FWCIMAssets Potential savings: 5.62 KB
Est savings of 6 KiB
Image elements do not have explicit `width` and `height`

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

  • https://m.media-amazon.com/images/I/71suMYkfm8L._SR854,1368_.jpg
  • https://m.media-amazon.com/images/I/613a9s56h7L._SR854,1368_.jpg
  • https://m.media-amazon.com/images/I/71cjfh5rAwL._SR285,456_.jpg
  • https://m.media-amazon.com/images/I/71O6lpSTzGL._SR285,456_.jpg
  • https://m.media-amazon.com/images/I/31UGhxPQOtL._SR140,140_.jpg
Open
Avoid enormous network payloads

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

  • https://m.media-amazon.com/images/I/B14LAuXbATL.mp4
  • https://m.media-amazon.com/images/I/B14LAuXbATL.mp4
  • https://m.media-amazon.com/images/I/A1xkIlSKdRL.mp4
  • https://m.media-amazon.com/images/I/A1xkIlSKdRL.mp4
  • https://www.amazon.co.uk/
Total size was 10,398 KiB
Improve image delivery

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

  • https://m.media-amazon.com/images/I/71suMYkfm8L._SR854,1368_.jpg This image file is larger than it needs to be (854x1368) for its displayed dimensions (554x888). Use responsive images to reduce the image download size. | Potential savings: 101.34 KB
  • https://m.media-amazon.com/images/I/61n4Jy76M5L._SX855_.jpg This image file is larger than it needs to be (855x1368) for its displayed dimensions (554x887). Use responsive images to reduce the image download size. | Potential savings: 69.6 KB
  • https://m.media-amazon.com/images/S/sash/MAbi1rCjQI9H2y0.png Using a modern image format (WebP, AVIF) or increasing the image compression could improve this image's download size. | Potential savings: 35.03 KB
Est savings of 206 KiB
Speed Index

Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric.

4.6 s
Total Blocking Time

Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric.

210 ms
Cumulative Layout Shift

Cumulative Layout Shift measures the movement of visible elements within the viewport. Learn more about the Cumulative Layout Shift metric.

0.1

Chrome UX Report

Real-user experience shares from recent Chrome visits to this website.

Origin: https://www.amazon.co.uk

Mobile 56.1% Desktop 38.8% Tablet 5.1%
Metric User experience share 75th percentile
LCP
Good 87.8% Needs improvement 8.2% Poor 4.0%
1.72 s
INP
Good 79.9% Needs improvement 13.2% Poor 6.9%
161 ms
CLS
Good 72.1% Needs improvement 14.6% Poor 13.2%
0.11
FCP
Good 89.6% Needs improvement 6.9% Poor 3.6%
1.04 s
TTFB
Good 79.7% Needs improvement 14.2% Poor 6.1%
659 ms

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