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 1 May 2026 15:25:04.

New test

Up
  • HTTP status 200
  • Response time 1.09 s
  • Document load time 0 ms
  • Full page load time 0 ms
  • Document size 0 B
  • Full page size 0 B
56/100
  • Mobile score 56
  • Desktop score 89

Observer's Performance Suggestions

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

Slow server response (1086 ms)
Warning Medium

Server took 1.086 seconds to respond. Investigate backend latency or upstream timeouts. Read more

No MX records configured
Warning Medium

Email cannot be delivered to this domain. Add MX records if you intend to receive mail. Read more

Fewer than two nameservers
Warning Medium

A single nameserver is a single point of failure. Configure at least two NS records on different networks. Read more

Desktop performance needs improvement (89/100)
Warning Medium

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

Mobile performance needs improvement (56/100)
Warning Medium

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

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

Only 75% of real-user samples fall in the "good" bucket for Cumulative Layout Shift. Read more

Reduce initial server response time
Info High

Reduce time to first byte by speeding up backend processing or caching. Read more

Reduce unused JavaScript
Info Medium

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

Did you know?

Observer tracks these signals every day and alerts you the moment something important changes. Register now.

16 Jan 2027

241 days left

Whois

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

SSL

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.

  • 18.165.62.8
  • 2600:9000:2467:e400:15:c9dc:596:d01
  • 2600:9000:2467:e00:15:c9dc:596:d01
  • 2600:9000:2467:e000:15:c9dc:596:d01
  • 2600:9000:2467:6800:15:c9dc:596:d01
  • 2600:9000:2467:6600:15:c9dc:596:d01
  • 2600:9000:2467:c400:15:c9dc:596:d01
  • 2600:9000:2467:7000:15:c9dc:596:d01
  • 2600:9000:2467:8200:15:c9dc:596:d01
  • tp.bfbdc3ca1-frontier.amazon.co.uk

No records returned.

No records returned.

No records returned.

Resource Summary

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

Total 6.37 MB 153 requests 100% of total size
Media 3.59 MB 2 requests 56% of total size
Image 905.62 KB 69 requests 14% of total size
Font 723.6 KB 21 requests 11% of total size
Script 592.89 KB 32 requests 9.1% of total size
Document 408.52 KB 2 requests 6.3% of total size
Other 124 KB 16 requests 1.9% of total size
Stylesheet 83.26 KB 11 requests 1.3% of total size
Third-party 6.37 MB 153 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 609 ms

The server starts responding quickly.

Poor First Contentful Paint 4.09 s

Users wait too long before any content appears.

Poor Largest Contentful Paint 13.61 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 4.92 s

Visual progress is slower than recommended.

Requires improvement Total Blocking Time 239 ms

Script execution still delays interactivity.

Requires improvement Max Potential FID 184 ms

Potential input delay may still feel sluggish.

Poor Time to Interactive 14.85 s

Users wait too long before the page responds.

TTFB 609 ms
FCP 4.09 s
LCP 13.61 s
TTI 14.85 s

Loading Filmstrip

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

Mobile filmstrip frame at 778 ms
778 ms
Mobile filmstrip frame at 1.56 s
1.56 s
Mobile filmstrip frame at 2.34 s
2.34 s
Mobile filmstrip frame at 3.11 s
3.11 s
Mobile filmstrip frame at 3.89 s
3.89 s
Mobile filmstrip frame at 4.67 s
4.67 s
Mobile filmstrip frame at 5.45 s
5.45 s
Mobile filmstrip frame at 6.23 s
6.23 s

Google Pagespeed Insights

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

Mobile 56
Desktop 89

Audit Details

AuditInsightImpact
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
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

5.1 s
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: 117.59 KB
  • https://m.media-amazon.com/images/I/11I0WXrZVoL._RC%7C11Y+5x+kkTL.js,51vYHGMfzIL.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,61e6cgeFiAL.js,01ikBbTAneL.js,31v298o2m6L.js,319aVrJ-hdL.js,310oAe11MnL.js,11F929pmpYL.js,31mosk8yNCL.js,01qkmZhGmAL.js,31rqCOnXDNL.js,011FfPwYqHL.js,21Xgf5G-ZWL.js,21sqSVZyapL.js,21kN0q4IA-L.js,21HZlWnI+gL.js,11vb6P5C5AL.js,016H7SZZQjL.js_.js?AUIClients/AmazonUI Potential savings: 66.02 KB
  • https://m.media-amazon.com/images/I/813oc2vlx2L._RC%7C31UBFcbo1CL.js,01wcltxKR5L.js,41FbfgEBSXL.js_.js?AUIClients/QTipsMobileWebAssets Potential savings: 35.42 KB
  • https://m.media-amazon.com/images/I/01V50JopleL._RC%7C01kC46b9vjL.js,81m+VvWOMhL.js_.js?AUIClients/RetailSearchAutocompleteAssets Potential savings: 28.33 KB
  • https://m.media-amazon.com/images/I/81kCF8wuZEL.js?AUIClients/FWCIMAssets Potential savings: 23.68 KB
Est savings of 271 KiB
Forced reflow

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.

  • https://m.media-amazon.com/images/I/11I0WXrZVoL._RC%7C11Y+5x+kkTL.js,51vYHGMfzIL.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,61e6cgeFiAL.js,01ikBbTAneL.js,31v298o2m6L.js,319aVrJ-hdL.js,310oAe11MnL.js,11F929pmpYL.js,31mosk8yNCL.js,01qkmZhGmAL.js,31rqCOnXDNL.js,011FfPwYqHL.js,21Xgf5G-ZWL.js,21sqSVZyapL.js,21kN0q4IA-L.js,21HZlWnI+gL.js,11vb6P5C5AL.js,016H7SZZQjL.js_.js?AUIClients/AmazonUI
Open
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
LCP request discovery

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

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/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,01EJgRrSvHL.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,213X3ZxQ8AL.css,11txQ3I54VL.css,01qiwJ7qDfL.css,21XmMEUBgJL.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/21NZdO3uFtL.js?AUIClients/GWMMetricsJS#isWindowDisplay-true
  • https://m.media-amazon.com/images/I/51hieePaMlL._RC%7C51waPb-h-9L.css,51to0n6xYnL.css_.css?AUIClients/NavMobileAssets-all#778344-T1.1323989-T1
  • https://m.media-amazon.com/images/I/01Pawi1rYeL.css?AUIClients/AmazonHomepageWindowDisplayAssets
Est savings of 1,450 ms
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/VjTR4RqBzY0mUYx.woff2
  • https://m.media-amazon.com/images/S/sash/ozb5-CLHQWI6Soc.woff2
  • https://m.media-amazon.com/images/S/sash/NvWNxKhmDbgI1lq.woff2
  • https://m.media-amazon.com/images/S/sash/Wdqa3S7nfGc3Naj.woff2
  • https://m.media-amazon.com/images/S/sash/MexTn601PAhMvAn.woff2
Est savings of 30 ms
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
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

13.6 s
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/
  • Unattributable
  • https://m.media-amazon.com/images/I/11I0WXrZVoL._RC%7C11Y+5x+kkTL.js,51vYHGMfzIL.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,61e6cgeFiAL.js,01ikBbTAneL.js,31v298o2m6L.js,319aVrJ-hdL.js,310oAe11MnL.js,11F929pmpYL.js,31mosk8yNCL.js,01qkmZhGmAL.js,31rqCOnXDNL.js,011FfPwYqHL.js,21Xgf5G-ZWL.js,21sqSVZyapL.js,21kN0q4IA-L.js,21HZlWnI+gL.js,11vb6P5C5AL.js,016H7SZZQjL.js_.js?AUIClients/AmazonUI
  • https://m.media-amazon.com/images/I/512of9GqnKL._RC%7C11sflnhgXuL.js,11NBZ7Qe33L.js_.js?AUIClients/GWMWebAssets
  • https://m.media-amazon.com/images/I/4150QKmrAVL.js?xcp
2.2 s
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

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8 layout shifts found
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.

14.8 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.

4.1 s
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/41hfuO15ziL._SR1242,150_.jpg
  • https://m.media-amazon.com/images/I/712nuu6ZF5L._SR285,456_.jpg
  • https://m.media-amazon.com/images/I/61tWu+Bid5L._SR427,240_.jpg
  • https://m.media-amazon.com/images/I/41vKWwwKxWL._SR140,140_.jpg
  • https://m.media-amazon.com/images/I/31Sp2PFeYnL._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/B1KO-nuf2uL.mp4
  • https://www.amazon.co.uk/
  • https://m.media-amazon.com/images/I/91u1iWIbVEL.js?AUIClients/VideoJsCardsBuzz
  • https://m.media-amazon.com/images/I/611mbhIZHAL._SX855_.jpg
  • https://m.media-amazon.com/images/I/61n4Jy76M5L._SX855_.jpg
Total size was 6,519 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=R40AEWSA5J4BXPG50KKG&sid=522-8255761-1801524&rx=Tn5GFR+43sxV/ybqFkwp8hXwk53xId9O0mdr9QDLEdA Potential savings: 691 B
  • https://www.amazon.co.uk/rd/uedata?rid=R40AEWSA5J4BXPG50KKG&sid=522-8255761-1801524&rx=FxPND6WQBd3OSBErncLYqg Potential savings: 691 B
  • https://fls-eu.amazon.co.uk/1/batch/1/OP/A1F83G8C2ARO7P:522-8255761-1801524:R40AEWSA5J4BXPG50KKG$uedata=s:%2Frd%2Fuedata%3Fstaticb%26id%3DR40AEWSA5J4BXPG50KKG:0 Potential savings: 195 B
  • https://fls-eu.amazon.co.uk/1/batch/1/OP/A1F83G8C2ARO7P:522-8255761-1801524:R40AEWSA5J4BXPG50KKG$uedata=s:%2Frd%2Fuedata%3Fld%26v%3D0.344943.0%26id%3DR40AEWSA5J4BXPG50KKG%26sw%3D412%26sh%3D823%26vw%3D412%26vh%3D823%26m%3D1%26sc%3DR40AEWSA5J4BXPG50KKG%26ue%3D6%26bb%3D83%26ns%3D121%26ne%3D126%26cf%3D253%26af%3D277%26fn%3D278%26be%3D415%26fp%3D267%26fcp%3D267%26pc%3D865%26tc%3D-585%26na_%3D-585%26ul_%3D-1777649062569%26_ul%3D-1777649062569%26rd_%3D-1777649062569%26_rd%3D-1777649062569%26fe_%3D-585%26lk_%3D-585%26_lk%3D-585%26co_%3D-585%26_co%3D-585%26sc_%3D-1777649062569%26rq_%3D-585%26rs_%3D-45%26_rs%3D-45%26dl_%3D-35%26di_%3D478%26de_%3D479%26_de%3D479%26_dc%3D864%26ld_%3D865%26_ld%3D-1777649062569%26ntd%3D0%26ty%3D0%26rc%3D0%26hob%3D3%26hoe%3D7%26ld%3D866%26t%3D1777649063435%26ctb%3D1%26rt%3Dcf%3A25-4-11-10-2-7-0_af%3A25-4-11-10-2-7-0_ld%3A44-22-11-10-2-20-0%26csmtags%3Daui%7Caui%3Aaui_build_date%3A3.26.4-2026-04-28%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%26viz%3Dvisible%3A6%26pty%3Dgateway-phone-web%26spty%3Dmobile%26pti%3Dmobile%26tid%3DR40AEWSA5J4BXPG50KKG%26aftb%3D1%26lob%3D1:875 Potential savings: 195 B
  • https://fls-eu.amazon.co.uk/1/batch/1/OP/A1F83G8C2ARO7P:522-8255761-1801524:R40AEWSA5J4BXPG50KKG$uedata=s:%2Frd%2Fuedata%3Fld%26v%3D0.344943.0%26id%3DR40AEWSA5J4BXPG50KKG%26sc0%3Dgwm-head-aui-assets%26bb0%3D80%26cf0%3D80%26pc0%3D81%26ld0%3D81%26t0%3D1777649062650%26sc1%3Dportal-bb%26pc1%3D9%26ld1%3D9%26t1%3D1777649062661%26sc2%3Dlg%26af2%3D281%26pc2%3D281%26ld2%3D281%26t2%3D1777649062850%26sc3%3Dgwm%26af3%3D302%26pc3%3D302%26ld3%3D302%26t3%3D1777649062871%26sc4%3DcsmCELLSframework%26bb4%3D418%26pc4%3D419%26ld4%3D419%26t4%3D1777649062988%26sc5%3DcsmCELLSpdm%26bb5%3D419%26pc5%3D421%26ld5%3D421%26t5%3D1777649062990%26sc6%3DcsmCELLSvpm%26bb6%3D422%26pc6%3D422%26ld6%3D422%26t6%3D1777649062991%26sc7%3DcsmCELLSfem%26bb7%3D422%26pc7%3D422%26ld7%3D422%26t7%3D1777649062991%26sc8%3Due_sushi_v1%26bb8%3D423%26pc8%3D424%26ld8%3D424%26t8%3D1777649062993%26sc9%3Dinteractivity%26cf9%3D494%26pc9%3D494%26ld9%3D494%26t9%3D1777649063063%26sc10%3Dwebsite%26pc10%3D797%26ld10%3D797%26t10%3D1777649063366%26sc11%3Dwpn%3Aunsupported%26pc11%3D800%26ld11%3D800%26t11%3D1777649063369%26sc12%3Dwpn%3Aunsupported%3Asw_no_ctlr%26pc12%3D801%26ld12%3D801%26t12%3D1777649063370%26ctb%3D1:875 Potential savings: 195 B
Est savings of 5 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/611mbhIZHAL._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: 70.96 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
  • https://m.media-amazon.com/images/I/51cV9z7wg8L._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: 31.52 KB
  • https://m.media-amazon.com/images/I/31rQEyYtYfL._SR783,69_FMpng_.png Using a modern image format (WebP, AVIF) or increasing the image compression could improve this image's download size. | Potential savings: 24.17 KB
Est savings of 283 KiB
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,01EJgRrSvHL.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,213X3ZxQ8AL.css,11txQ3I54VL.css,01qiwJ7qDfL.css,21XmMEUBgJL.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: 50.97 KB
  • ._billboard-card_style_wd-backdrop-data__1znxG{height:100%} … Potential savings: 25.47 KB
  • ._single-creative-card_style_wd-backdrop-data__1znxG{height:100%} … Potential savings: 23.26 KB
  • ._interactive-footer-card_style_container__3GKmA{grid-gap:8px;display:grid;gap:8px; … } … Potential savings: 22.23 KB
  • ._sign-in-v2_style_heading__1mnEu{font-size:20px} … Potential savings: 18.64 KB
Est savings of 172 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,81m+VvWOMhL.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: 5.64 KB
Est savings of 6 KiB
Speed Index

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

4.9 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.

180 ms
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.

240 ms
Cumulative Layout Shift

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

0.103

Chrome UX Report

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

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

Mobile 55.6% Desktop 39.3% Tablet 5.1%
MetricUser experience share75th percentile
LCP
Good 88.2% Needs improvement 7.9% Poor 3.9%
1.68 s
INP
Good 79.8% Needs improvement 13.4% Poor 6.9%
161 ms
CLS
Good 74.7% Needs improvement 13.2% Poor 12.1%
0.10
FCP
Good 90.3% Needs improvement 6.1% Poor 3.6%
1.01 s
TTFB
Good 80.9% Needs improvement 13.6% Poor 5.4%
618 ms

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