C — https://oed.com | BeaverCheck Audit

Site Health

Score: 71 / 100

Based on 8 categories, 0 sections

Decent speed, but optimizing further could improve engagement.

Good foundation, but a few gaps could be exploited.

Several issues make your site difficult for assistive technology users.

Solid SEO basics — a few optimizations could boost rankings.

Good server performance with room for optimization.

Several regulatory requirements are not yet met.

Missing metadata means poor previews on social media and search.

Reasonable footprint with room for optimization.

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

How the composite score is calculated

How you compare

Amazon ALB · 46 peers

You 71

Avg 71

At average

0 50 100

Better than 21% of Amazon ALB sites See full Amazon ALB benchmark →

Amazon Route 53 · 966 peers

You 71

Avg 72

At average

0 50 100

Better than 24% of Amazon Route 53 sites See full Amazon Route 53 benchmark →

Top Priorities (5)

Content-Security-Policy header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers

Cookie 'AWSALB' is missing the Secure flag

Security gaps expose your site and users to attacks, eroding trust.

Security › Cookie Security

No Content-Security-Policy header found

Security gaps expose your site and users to attacks, eroding trust.

Security › Content Security Policy

No <main> landmark found

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Landmark Structure

No favicon or icon links detected

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Favicon & Branding

View fix priority matrix

Fix Priority Matrix

5 findings

Impact

Quick Wins

High impact, low effort — start here.

Strategic

High impact, requires investment.

Easy Improvements

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →

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Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Foed.com)](https://beavercheck.com/results/e7a36741-1783-48d6-8639-8c18cd81c6ea)

HTML

<a href="https://beavercheck.com/results/e7a36741-1783-48d6-8639-8c18cd81c6ea"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Foed.com" alt="BeaverCheck Score"></a>

Image URL

https://beavercheck.com/badge?url=https%3A%2F%2Foed.com

This badge auto-updates with your latest scan result.

What fixing these means

Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Accessibility issues exclude users who rely on assistive technology — an estimated 15% of your potential audience. Addressing the critical issues below would have the most immediate impact on your user trust.

3 security gaps detected — browsers may warn visitors about your site.

2 accessibility issues exclude users who rely on assistive technology.

Conversion Barriers

2 critical 6 warning

8 barrier(s) likely increasing bounce by ~36%.

Speed (2)

Page takes 11.1s to load

+12% bounce

Users abandon at ~3s — you're 8.6s over the 2.5s threshold

Fix: Optimize render-blocking resources, preload the hero image, and compress images

High main-thread blocking time

+2% bounce

Page is non-interactive for 228ms after first paint

Fix: Defer third-party scripts and split large bundles

Trust (1)

No Content-Security-Policy header

+1% bounce

Higher XSS blast radius — one compromised script can exfiltrate the checkout form

Fix: Ship a reporting-only CSP first, then enforce once violations are clean

Usability (1)

No viewport meta tag

+15% bounce

Mobile browsers render at desktop width and shrink — text unreadable, tap targets miniature

Fix: Add <meta name="viewport" content="width=device-width, initial-scale=1">

Content (3)

No Open Graph tags

+2% bounce

Links shared on LinkedIn / Slack / Facebook show bare URLs — referral clicks drop

Fix: Add og:title, og:description, og:image, og:url to the page head

No structured data

+2% bounce

No rich-result eligibility in Google — lower SERP CTR vs competitors with stars and prices

Fix: Add JSON-LD for your page type (Product, Article, FAQPage, LocalBusiness, …)

Thin content

+3% bounce

Under 300 words — visitors bounce looking for substance, search engines rank competitors first

Fix: Add a substantive FAQ, product detail, or case-study section

Navigation (1)

No skip-to-content link

+1% bounce

Keyboard and screen-reader users must tab through the entire header on every page

Fix: Add a visible-on-focus <a href="#main">Skip to content</a> as the first focusable element

Preliminary CRO audit — each barrier links to the tab with detailed analysis.

Return on Investment

$450 investment → $4,295/month returns + USD 157,500 risk avoided

Payback period: < 1 month First-year ROI: +11354%

Investment

$450

4h · 5 findings

Monthly returns

$4,295 /mo

~$51,545 / year

Conversions recovered $4,295
Bandwidth savings $0.25

Regulatory risk avoided

USD 157,500

if kept compliant

ADA Title III USD 150,000
CCPA/CPRA USD 7,500

Payback period

0 12mo 24mo

$150 — in quick wins — start here for the fastest payback

Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.

Full methodology & sources

Estimated Remediation Cost

$450

4.5 developer hours at $100/hr

Based on United States rates ($100/hr)

Quick wins

$150 3 fixes in ~90 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions

Custom rate

$ /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

$13,125 / month at risk

~$157,503 / year if left unfixed

Compliance Risk

$157,500

ADA Title IIICCPA/CPRA

No privacy policy link detected
CCPA/CPRA: USD 2,500 – USD 7,500
Trackers detected but no cookie policy found
CCPA/CPRA: USD 2,500 – USD 7,500
Trackers detected but no privacy policy found
CCPA/CPRA: USD 2,500 – USD 7,500

+4 more

Bandwidth Waste

$0.25 /mo

3124.2 MB/mo × 0.080 USD/GB

Optimize transfer: save ~312 KB per page load
Saves $0.25/mo

Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.

Compliance methodology · SEO assumptions · Bandwidth model

Your performance is already good — improvements may show diminishing returns

Monthly visitors

Unique monthly visitors from your analytics

Conversion rate (%)

Purchases, signups, or key actions

Avg. order value

Optional — for revenue estimation

additional conversions/month

more engaged visitors from reduced bounce

potential monthly revenue

Current bounce (est.)

After fixes (est.)

Estimated bounce reduction

Fix 5 critical issues to capture this value

How this is calculated

Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.

Your site's LCP: → estimated after fixes.

These are estimates based on industry research — actual results vary

Bounce-rate model & assumptions

Your data stays in your browser — nothing is sent to our servers

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

Accessibility

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

5.05 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

11.08 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

228 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.052

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

5.05 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

11.26 s

Detailed Report

Audit breakdown by category with detailed findings.

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

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.

Source: Google web.dev / Lighthouse

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.

Request	Cache TTL	Transfer Size
cdn-ukwest.onetrust.com/scripttemplates/202410.1.0/otBannerSdk.js	86400.0 s	111.8 KiB
/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Anted...	0.0 ms	14.4 KiB
/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Book-...	0.0 ms	12.5 KiB
/com.idmgroup.oed100.sounds.prod/wp-content/uploads/hourg...	0.0 ms	9.8 KiB
/com.idmgroup.oed100.sounds.prod/wp-content/uploads/jay-w...	0.0 ms	8.1 KiB
cdn-ukwest.onetrust.com/logos/static/ot_company_logo.png	86400.0 s	19.2 KiB
cdn-ukwest.onetrust.com/scripttemplates/otSDKStub.js	86400.0 s	9.1 KiB
ouptag.scholarlyiq.com/ntpagetag.js	0.0 ms	3.6 KiB
/scripttemplates/otSDKStub.js?did=019092d6-b3fd-7931-a3f3...	86400.0 s	8.6 KiB
cdn-ukwest.onetrust.com/logos/static/powered_by_logo.svg	86400.0 s	2.6 KiB
/ntpagetag.gif?js=1&ts=1776894603338.60&lc=https%3A%2F%2F...	0.0 ms	375 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.

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.

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

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.

URL	Transfer Size	Duration
www.oed.com/js/idm.js?version=1.53	20.9 KiB	655 ms
www.oed.com/js/chart-3.8.0.js?version=1.53	66.8 KiB	1.7 s
www.oed.com/js/common.js?version=1.53	2.8 KiB	200 ms
www.oed.com/js/main.js?version=1.53	17.7 KiB	655 ms
www.oed.com/js/api.js?version=1.53	2.8 KiB	200 ms
www.oed.com/js/tippy-bundle.umd.min.js?version=1.53	9.7 KiB	807 ms
www.oed.com/js/popper.min.js?version=1.53	8.4 KiB	655 ms
www.oed.com/js/js.cookie.min.js?version=1.53	2.1 KiB	504 ms
www.oed.com/js/jquery-3.7.1.min.js?version=1.53	31.0 KiB	1.3 s
/css2?family=DM+Serif+Display:ital@0;1&family=Lora:ital,w...	3.8 KiB	838 ms
www.oed.com/css/oup.css?version=1.53	21.7 KiB	504 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.

	URL	Resource Size	Est Savings
A wooden tray with letters `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Anted...	14.0 KiB	4.7 KiB

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Protocol
www.oed.com/?tl=true	http/1.1
www.oed.com/css/oup.css?version=1.53	http/1.1
www.oed.com/js/jquery-3.7.1.min.js?version=1.53	http/1.1
www.oed.com/js/js.cookie.min.js?version=1.53	http/1.1
www.oed.com/js/chart-3.8.0.js?version=1.53	http/1.1
www.oed.com/js/popper.min.js?version=1.53	http/1.1
www.oed.com/js/tippy-bundle.umd.min.js?version=1.53	http/1.1
www.oed.com/js/main.js?version=1.53	http/1.1
www.oed.com/js/api.js?version=1.53	http/1.1
www.oed.com/js/idm.js?version=1.53	http/1.1
www.oed.com/js/common.js?version=1.53	http/1.1
www.oed.com/images/oxford.svg	http/1.1
www.oed.com/images/info-white.svg	http/1.1
www.oed.com/images/account-white.svg	http/1.1
www.oed.com/images/spark-white.svg	http/1.1
www.oed.com/images/logo3.svg	http/1.1
www.oed.com/images/search.svg	http/1.1
www.oed.com/images/close.svg	http/1.1
www.oed.com/images/clear.svg	http/1.1
www.oed.com/images/search-white.svg	http/1.1
www.oed.com/images/oup-logo-white.svg	http/1.1
www.oed.com/images/icons/manifest.json	http/1.1
www.oed.com/images/launchpad.svg	http/1.1
www.oed.com/images/chevron-right-white.svg	http/1.1
www.oed.com/images/icons/favicon.ico	http/1.1

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: 3.7 s

URL	Time Spent
oed.com/	861 ms
www.oed.com/	865 ms
/oauth2/authorization/transparent?p=eyJlbmMiOiJBMjU2Q0JDL...	565 ms
/authorize?response_type=code&client_id=OED&scope=openid+...	836 ms
/auth/login?error=login_required&state=bLkFQh8Kw24YLokrTT...	565 ms
www.oed.com/?tl=true	0.0 ms

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

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 180 ms 21.4 KiB

URL	Transfer Size	Est Savings
www.oed.com/js/idm.js?version=1.53	19.6 KiB	7.8 KiB
www.oed.com/js/main.js?version=1.53	16.4 KiB	7.3 KiB
unpkg.com/tippy.js@6/dist/tippy-bundle.umd.js	18.4 KiB	6.3 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: 180 ms 36.7 KiB

URL	Transfer Size	Est Savings
	20.8 KiB	18.5 KiB
www.oed.com/css/oup.css?version=1.53	20.4 KiB	18.1 KiB

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

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Estimated savings: 1.6 s 350.6 KiB

URL	Transfer Size	Est Savings
cdn-ukwest.onetrust.com/scripttemplates/202410.1.0/otBannerSdk.js	111.7 KiB	97.5 KiB
www.googletagmanager.com/gtag/js?id=G-4PQNDVV0GD&cx=c&gtm=4e64k0	173.0 KiB	72.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-W55924M	134.1 KiB	62.1 KiB
cdn-ukwest.onetrust.com/scripttemplates/202410.1.0/otBannerSdk.js	111.7 KiB	60.6 KiB
www.oed.com/js/chart-3.8.0.js?version=1.53	65.5 KiB	58.2 KiB

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 reason	Failure 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 3.8 KiB

URL	Transfer Size	Est Savings
www.oed.com/css/oup.css?version=1.53	21.7 KiB	3.8 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
A pile of books `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Book-...
A wooden tray with letters `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Anted...
A close up of a globe `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/jay-w...
An hourglass on a table `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/hourg...
More informations `div.wrapper > div.headerRight > a.informationMenuLink > img`	www.oed.com/images/info-white.svg
account `div.headerRight > div.accountButtonAndStatus > button.modalTrigger > img`	www.oed.com/images/account-white.svg
search `form#search-form > div.searchInputAndButton > button.submitSearch > img`	www.oed.com/images/search.svg
Oxford University Press `div.wrapper > div.footerMain > div.footerLogo > img.oupLogo`	www.oed.com/images/oup-logo-white.svg
Oxford `header.siteHeader > div.wrapper > div.siteName > img.oxfordSolus`	www.oed.com/images/oxford.svg
Oxford English Dictionary `div.row > div.wrapper > div.homeSearch > img.siteLogo`	www.oed.com/images/logo3.svg

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

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Optimize viewport for mobile

●Avoids enormous network payloads Total size was 1,017 KiB

●User Timing marks and measures 5 user timings

●JavaScript execution time 1.0 s

●Minimizes main-thread work 1.9 s

●Avoid long main-thread tasks 9 long tasks found

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 40 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 60 ms

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

○LCP request discovery

○Avoid non-composited animations

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.

Navigation

A value greater than 0 implies an explicit navigation ordering. Although technically valid, this often creates frustrating experiences for users who rely on assistive technologies. Learn more about the `tabindex` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Skip to main content `body#homePage > div#skipToMainContainer > div.wrapper > a#skipToMainLink`

These are opportunities to improve keyboard navigation in your application.

○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

●`[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.

●Select elements have associated label elements.

●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

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●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 an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○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

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<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

○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.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Elements with visible text labels have matching accessible names.

○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.

Best Practices

General

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.

Source	Description
cdn-ukwest.onetrust.com/scripttemplates/202410.1.0/otBannerSdk.js line 6, col 463846	`Uncaught TypeError: Cannot read properties of undefined (reading 'TenantFeatures')`

●Uses HTTPS

●Avoids deprecated APIs

●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

●Displays images with correct aspect ratio

●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

●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

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

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 destination	Link Text
cookiepedia.co.uk/giving-consent-to-cookies	More information

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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.65 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

3.10 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.033

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.65 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

3.11 s

Detailed Report

Audit breakdown by category with detailed findings.

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.

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

Source: Google web.dev / Lighthouse

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.

Request	Cache TTL	Transfer Size
cdn-ukwest.onetrust.com/scripttemplates/202410.1.0/otBannerSdk.js	86400.0 s	111.9 KiB
/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Anted...	0.0 ms	14.4 KiB
/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Book-...	0.0 ms	12.5 KiB
/com.idmgroup.oed100.sounds.prod/wp-content/uploads/hourg...	0.0 ms	9.8 KiB
/com.idmgroup.oed100.sounds.prod/wp-content/uploads/jay-w...	0.0 ms	8.1 KiB
cdn-ukwest.onetrust.com/logos/static/ot_company_logo.png	86400.0 s	19.2 KiB
/scripttemplates/otSDKStub.js?did=019092d6-b3fd-7931-a3f3...	86400.0 s	9.0 KiB
ouptag.scholarlyiq.com/ntpagetag.js	0.0 ms	3.6 KiB
cdn-ukwest.onetrust.com/scripttemplates/otSDKStub.js	86400.0 s	8.6 KiB
cdn-ukwest.onetrust.com/logos/static/powered_by_logo.svg	86400.0 s	2.6 KiB
/ntpagetag.gif?js=1&ts=1776894617784.530&lc=https%3A%2F%2...	0.0 ms	375 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.

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.

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

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.

URL	Transfer Size	Duration
www.oed.com/js/idm.js?version=1.53	20.9 KiB	170 ms
www.oed.com/js/chart-3.8.0.js?version=1.53	66.8 KiB	421 ms
www.oed.com/js/common.js?version=1.53	2.8 KiB	87 ms
www.oed.com/js/main.js?version=1.53	17.7 KiB	170 ms
www.oed.com/js/api.js?version=1.53	2.8 KiB	87 ms
www.oed.com/js/tippy-bundle.umd.min.js?version=1.53	9.7 KiB	212 ms
www.oed.com/js/popper.min.js?version=1.53	8.4 KiB	212 ms
www.oed.com/js/js.cookie.min.js?version=1.53	2.2 KiB	170 ms
www.oed.com/js/jquery-3.7.1.min.js?version=1.53	31.0 KiB	337 ms
/css2?family=DM+Serif+Display:ital@0;1&family=Lora:ital,w...	3.8 KiB	284 ms
www.oed.com/css/oup.css?version=1.53	21.7 KiB	170 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.

	URL	Resource Size	Est Savings
A wooden tray with letters `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Anted...	14.0 KiB	8.1 KiB
A pile of books `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Book-...	12.1 KiB	6.2 KiB

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Protocol
www.oed.com/?tl=true	http/1.1
www.oed.com/css/oup.css?version=1.53	http/1.1
www.oed.com/js/jquery-3.7.1.min.js?version=1.53	http/1.1
www.oed.com/js/js.cookie.min.js?version=1.53	http/1.1
www.oed.com/js/chart-3.8.0.js?version=1.53	http/1.1
www.oed.com/js/popper.min.js?version=1.53	http/1.1
www.oed.com/js/tippy-bundle.umd.min.js?version=1.53	http/1.1
www.oed.com/js/main.js?version=1.53	http/1.1
www.oed.com/js/api.js?version=1.53	http/1.1
www.oed.com/js/idm.js?version=1.53	http/1.1
www.oed.com/js/common.js?version=1.53	http/1.1
www.oed.com/images/oxford.svg	http/1.1
www.oed.com/images/info-white.svg	http/1.1
www.oed.com/images/account-white.svg	http/1.1
www.oed.com/images/spark-white.svg	http/1.1
www.oed.com/images/logo3.svg	http/1.1
www.oed.com/images/search.svg	http/1.1
www.oed.com/images/close.svg	http/1.1
www.oed.com/images/clear.svg	http/1.1
www.oed.com/images/search-white.svg	http/1.1
www.oed.com/images/oup-logo-white.svg	http/1.1
www.oed.com/images/icons/manifest.json	http/1.1
www.oed.com/images/launchpad.svg	http/1.1
www.oed.com/images/chevron-right-white.svg	http/1.1
www.oed.com/images/icons/favicon.ico	http/1.1

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: 1.1 s

URL	Time Spent
oed.com/	304 ms
www.oed.com/	313 ms
/oauth2/authorization/transparent?p=eyJlbmMiOiJBMjU2Q0JDL...	87 ms
/authorize?response_type=code&client_id=OED&scope=openid+...	303 ms
/auth/login?error=login_required&state=WIPzTBH0dGNevzXf-v...	87 ms
www.oed.com/?tl=true	0.0 ms

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

Diagnostics

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: 40 ms 3.8 KiB

URL	Transfer Size	Est Savings
www.oed.com/css/oup.css?version=1.53	21.7 KiB	3.8 KiB

Minifying JavaScript files can reduce payload sizes and script parse time. Learn how to minify JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 21.4 KiB

URL	Transfer Size	Est Savings
www.oed.com/js/idm.js?version=1.53	19.6 KiB	7.8 KiB
www.oed.com/js/main.js?version=1.53	16.4 KiB	7.3 KiB
unpkg.com/tippy.js@6/dist/tippy-bundle.umd.js	18.4 KiB	6.3 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: 40 ms 35.9 KiB

URL	Transfer Size	Est Savings
	20.8 KiB	18.2 KiB
www.oed.com/css/oup.css?version=1.53	20.4 KiB	17.7 KiB

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

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

Source: Google web.dev / Lighthouse

Estimated savings: 270 ms 349.2 KiB

URL	Transfer Size	Est Savings
cdn-ukwest.onetrust.com/scripttemplates/202410.1.0/otBannerSdk.js	111.7 KiB	97.5 KiB
www.googletagmanager.com/gtag/js?id=G-4PQNDVV0GD&cx=c&gtm=4e64k0	173.0 KiB	70.7 KiB
www.googletagmanager.com/gtm.js?id=GTM-W55924M	134.1 KiB	62.1 KiB
cdn-ukwest.onetrust.com/scripttemplates/202410.1.0/otBannerSdk.js	111.7 KiB	60.6 KiB
www.oed.com/js/chart-3.8.0.js?version=1.53	65.5 KiB	58.2 KiB

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 reason	Failure 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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL
A pile of books `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Book-...
A wooden tray with letters `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/Anted...
A close up of a globe `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/jay-w...
An hourglass on a table `div.editableContentPanels > a.contentPanel > div.contentPanelHead > img`	/com.idmgroup.oed100.sounds.prod/wp-content/uploads/hourg...
More informations `div.wrapper > div.headerRight > a.informationMenuLink > img`	www.oed.com/images/info-white.svg
account `div.headerRight > div.accountButtonAndStatus > button.modalTrigger > img`	www.oed.com/images/account-white.svg
search `form#search-form > div.searchInputAndButton > button.submitSearch > img`	www.oed.com/images/search.svg
Oxford University Press `div.wrapper > div.footerMain > div.footerLogo > img.oupLogo`	www.oed.com/images/oup-logo-white.svg
Oxford `header.siteHeader > div.wrapper > div.siteName > img.oxfordSolus`	www.oed.com/images/oxford.svg
Oxford English Dictionary `div.row > div.wrapper > div.homeSearch > img.siteLogo`	www.oed.com/images/logo3.svg

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

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Optimize viewport for mobile

●Max Potential First Input Delay 50 ms

●Avoids enormous network payloads Total size was 1,018 KiB

●User Timing marks and measures 5 user timings

●JavaScript execution time 0.2 s

●Minimizes main-thread work 0.5 s

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 50 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 60 ms

●Avoid large layout shifts 3 layout shifts found

○INP breakdown

○LCP request discovery

○Avoid long main-thread tasks

○Avoid non-composited animations

Accessibility

Navigation

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Skip to main content `body#homePage > div#skipToMainContainer > div.wrapper > a#skipToMainLink`

These are opportunities to improve keyboard navigation in your application.

○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

●`[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.

●Select elements have associated label elements.

●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

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●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 an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○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

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<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

○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.

○Uses ARIA roles only on compatible elements

○Elements with visible text labels have matching accessible names.

○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.

Best Practices

General

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.

Source	Description
cdn-ukwest.onetrust.com/scripttemplates/202410.1.0/otBannerSdk.js line 6, col 463846	`Uncaught TypeError: Cannot read properties of undefined (reading 'TenantFeatures')`

●Uses HTTPS

●Avoids deprecated APIs

●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

●Displays images with correct aspect ratio

●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

●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

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

SEO

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 destination	Link Text
cookiepedia.co.uk/giving-consent-to-cookies	More information

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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

○robots.txt is valid

Results for https://oed.com

Site Health

How you compare

Top Priorities (5)

Fix Priority Matrix

Quick Wins

Strategic

Easy Improvements

Deprioritize

What fixing these means

Conversion Barriers

Speed (2)

Trust (1)

Usability (1)

Content (3)

Navigation (1)

Return on Investment

Investment

Monthly returns

Regulatory risk avoided

Payback period

Estimated Remediation Cost

Cost by category

Cost by effort level

What Inaction Is Costing You

Compliance Risk

Bandwidth Waste

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Navigation

Best Practices

General

SEO

Content Best Practices

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Navigation

Best Practices

General

SEO

Content Best Practices

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