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Lighthouse Mobile

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

Audit breakdown by category with detailed findings.

29

Performance

Insights

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
connect.facebook.net/en_US/fbevents.js1200.0 s96.6 KiB
cdn.cookielaw.org/scripttemplates/202502.1.0/otBannerSdk.js86400.0 s114.9 KiB
/signals/config/7150223215068358?v=2.9.303&r=stable&domai...1200.0 s44.8 KiB
scripts.clarity.ms/0.8.59/clarity.js86400.0 s26.2 KiB
communications.on24.com/rs/848-AHN-047/images/rwts.js60.0 s10.2 KiB
cdn.bizible.com/scripts/bizible.js86400.0 s25.2 KiB
player.vimeo.com/api/player.js?ver=2.15.01800.0 s9.0 KiB
player.vimeo.com/api/player.js1800.0 s9.0 KiB
snap.licdn.com/li.lms-analytics/insight.min.js86400.0 s18.7 KiB
/scripttemplates/otSDKStub.js?did=91a3f79f-025e-4891-af24...86400.0 s9.1 KiB
script.crazyegg.com/pages/scripts/0070/0386.js300.0 s2.7 KiB
/attribution_tracking/conversions/793.js?p=https://www.on...0.0 ms2.2 KiB
/logos/88567b1d-ea01-46ec-9c7b-ab089dc20793/a03f4daf-8132...86400.0 s4.1 KiB
munchkin.marketo.net/munchkin.js0.0 ms1.2 KiB
communications.on24.com/rs/848-AHN-047/images/rw_blindform_tracker.js60.0 s1.1 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg86400.0 s2.5 KiB
communications.on24.com/rs/848-AHN-047/images/VimeoVideoTrackingCode.js60.0 s922 B
/collect?v=2&fmt=js&pid=659460&time=1776817120308&li_adsI...0.0 ms270 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.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:label label:Subpart valueType:text] map[key:duration label:Duration valueType:ms]]
items: [map[duration:329.847 label:Time to first byte subpart:timeToFirstByte] map[duration:2205.575 label:Element render delay subpart:elementRenderDelay]]
lhId: page-0-H1
nodeLabel: ON24 Announces Integration with LinkedIn® to Drive Next Generation of Event Mar…
path: 1,HTML,1,BODY,6,DIV,0,MAIN,1,SECTION,1,DIV,0,DIV,2,DIV,0,DIV,0,H1
selector: div.slick-slide > div.v3-module__inner > div.v3-anim-hero__slide__text > h1
snippet: <h1>

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
/wp-content/cache/min/1/ajax/libs/paginationjs/2.6.0/pagi...1.8 KiB493 ms
/wp-content/cache/min/1/wp-content/themes/ON24/dist/asset...86.9 KiB2.1 s
/wp-content/cache/min/1/ajax/libs/slick-carousel/1.8.1/sl...1.2 KiB493 ms
/wp-content/plugins/sitepress-multilingual-cms/templates/...1.1 KiB493 ms
/wp-content/cache/min/1/wp-content/plugins/wp-accessibili...1.7 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Screenshot 2026 02 24 at 7.05.00 PM div.c-video > div.c-video__iframe-container > div.c-video__lazy > img.c-video__lazy-poster
/wp-content/uploads/2026/02/Screenshot-2026-02-24-at-7.05...176.5 KiB163.4 KiB

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: 906 ms
URLTime Spent
on24.com/906 ms
www.on24.com/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

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: 300 ms 102.7 KiB
URLTransfer SizeEst Savings
/wp-content/cache/min/1/wp-content/themes/ON24/dist/asset...86.2 KiB83.2 KiB
19.8 KiB19.5 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

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.2 s 454.0 KiB
URLTransfer SizeEst Savings
www.googletagmanager.com/gtag/destination?id=G-EPVQ5FZV49&cx=c&gtm=4e64h1172.9 KiB69.6 KiB
cdn.cookielaw.org/scripttemplates/202502.1.0/otBannerSdk.js114.8 KiB64.8 KiB
www.googletagmanager.com/gtag/js?id=G-3BPFZFSGR0&cx=c&gtm=4e64h1157.8 KiB61.8 KiB
www.googletagmanager.com/gtm.js?id=GTM-NKPS2G180.2 KiB60.1 KiB
www.googletagmanager.com/gtag/js?id=AW-1069574889&cx=c&gtm=4e64h1143.6 KiB56.0 KiB
www.googletagmanager.com/gtag/js?id=DC-9855888129.8 KiB54.2 KiB
connect.facebook.net/en_US/fbevents.js96.5 KiB33.6 KiB
/pages/versioned/commontransformations-scripts/df70602680...71.7 KiB33.0 KiB
code.jquery.com/jquery-3.6.0.min.js?ver=3.6.030.2 KiB20.9 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
Unattributable1.4 s204 ms0.0 ms
www.googletagmanager.com/gtm.js?id=GTM-NKPS2G952 ms856 ms60 ms
www.on24.com/920 ms216 ms19 ms
www.googletagmanager.com/gtag/js?id=G-3BPFZFSGR0&cx=c&gtm=4e64h1855 ms795 ms45 ms
/pages/versioned/commontransformations-scripts/df70602680...508 ms445 ms20 ms
www.googletagmanager.com/gtag/destination?id=G-EPVQ5FZV49&cx=c&gtm=4e64h1382 ms323 ms54 ms
scripts.clarity.ms/0.8.59/clarity.js257 ms191 ms7.9 ms
cdn.cookielaw.org/scripttemplates/202502.1.0/otBannerSdk.js243 ms172 ms52 ms
/signals/config/7150223215068358?v=2.9.303&r=stable&domai...217 ms161 ms18 ms
www.googletagmanager.com/gtag/js?id=AW-1069574889&cx=c&gtm=4e64h1216 ms168 ms46 ms
connect.facebook.net/en_US/fbevents.js192 ms144 ms47 ms
j.6sc.co/6si.min.js190 ms150 ms6.6 ms
www.googletagmanager.com/gtag/js?id=DC-9855888186 ms139 ms35 ms
cdn.bizible.com/scripts/bizible.js183 ms165 ms9.6 ms
snap.licdn.com/li.lms-analytics/insight.min.js114 ms86 ms21 ms
/pages/versioned/tracking-scripts/158692313dc4b9f2e28d9e9...109 ms96 ms11 ms
code.jquery.com/jquery-3.6.0.min.js?ver=3.6.0106 ms62 ms25 ms
static.ads-twitter.com/uwt.js97 ms91 ms4.4 ms
communications.on24.com/rs/848-AHN-047/images/rwts.js77 ms70 ms7.4 ms
/scripttemplates/otSDKStub.js?did=91a3f79f-025e-4891-af24...77 ms62 ms2.6 ms
/wp-content/cache/min/1/wp-content/themes/ON24/dist/asset...71 ms0.0 ms0.0 ms
munchkin.marketo.net/165/munchkin.js55 ms14 ms32 ms
script.crazyegg.com/pages/scripts/0070/0386.js52 ms40 ms0.9 ms

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation5.8 s
Other1.4 s
Script Parsing & Compilation546 ms
Parse HTML & CSS399 ms
Style & Layout330 ms
Garbage Collection177 ms
Rendering25 ms

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
Personalize Scale li.v3-cards-and-bullets__col > div.v3-card__icon > picture.fly-picture > img.fly-picture__img
www.on24.com/wp-content/uploads/2025/07/Personalize_Scale.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
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoids enormous network payloads Total size was 1,830 KiB
●User Timing marks and measures 17 user timings
●Avoid long main-thread tasks 20 long tasks found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 70 ms
●Server Backend Latencies 150 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 150 ms
○INP breakdown
○LCP request discovery
○Avoid non-composited animations
○Avoid large layout shifts
84

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.

ARIA

Some ARIA parent roles must contain specific child roles to perform their intended accessibility functions. Learn more about roles and required children elements.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ON24 Announces Integration with LinkedIn® to Drive Next Generation of Event Mar… div#page-container > main#v3-modules > section#v3-anim-hero-19 > div.v3-anim-hero__slick

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Names and labels

Form elements without effective labels can create frustrating experiences for screen reader users. Learn more about the `select` element.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.v3-module__inner > div.v3-htwm__tabs > nav.v3-htwm__tabs__nav > select.v3-htwm__tabs__nav__mobile-dropdown div.v3-module__inner > div.v3-htwm__tabs > nav.v3-htwm__tabs__nav > select.v3-htwm__tabs__nav__mobile-dropdown

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.c-video > div.c-video__iframe-container > div.c-video__lazy > a.c-video__lazy-play div.c-video > div.c-video__iframe-container > div.c-video__lazy > a.c-video__lazy-play
div.c-video > div.c-video__iframe-container > div.c-video__lazy > a.c-video__lazy-play div.c-video > div.c-video__iframe-container > div.c-video__lazy > a.c-video__lazy-play

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Tables and lists

Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
footer.footer > div.footer-row > div.footer-misc-links > ul footer.footer > div.footer-row > div.footer-misc-links > ul

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

○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
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●`button`, `link`, and `menuitem` elements have accessible names
●ARIA attributes are used as specified for the element's role
●`[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
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●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
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○`[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
○Form elements have associated labels
○Links are distinguishable without relying on color.
○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.
77

Best Practices

General

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Deprecation / WarningSource
AttributionReporting
snap.licdn.com/li.lms-analytics/insight.min.js

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
www.on24.com/
Failed to find a valid digest in the 'integrity' attribute for resource 'https://player.vimeo.com/api/player.js?ver=2.15.0' with computed SHA-256 integrity 'uF4awf3XMGV+RExBccE4vxZDCtxbaXJx++b06Mj+wl0='. The resource has been blocked.
www.on24.com/wp-content/themes/ON24/images/v3/form-select-chevron.svg
Failed to load resource: the server responded with a status of 404 ()
ReferenceError: MktoForms2 is not defined at <anonymous>:1:292 at <anonymous>:2:56 at https://www.googletagmanager.com/gtm.js?id=GTM-NKPS2G:983:429 at uR (https://www.googletagmanager.com/gtm.js?id=GTM-NKPS2G:985:31) at Md.tR (https://www.googletagmanager.com/gtm.js?id=GTM-NKPS2G:982:92) at Md.<anonymous> (https://www.googletagmanager.com/gtm.js?id=GTM-NKPS2G:371:187) at k.apply (https://www.googletagmanager.com/gtm.js?id=GTM-NKPS2G:297:466) at fb (https://www.googletagmanager.com/gtm.js?id=GTM-NKPS2G:260:719) at eb (https://www.googletagmanager.com/gtm.js?id=GTM-NKPS2G:260:470) at Md.<anonymous> (https://www.googletagmanager.com/gtm.js?id=GTM-NKPS2G:321:473)
communications.on24.com/rs/848-AHN-047/images/rw_blindform_tracker.js line 1, col 0
Uncaught ReferenceError: MktoForms2 is not defined
●Uses HTTPS
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●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
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
●Page has valid source maps
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
92

SEO

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

Content Best Practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
www.on24.com/press-releases/cvent-closes-acquisition-of-on24/Read more
www.on24.com/platform/on24-linkedin-integration/?utm_cta=home-heroLEARN MORE
www.on24.com/platform/on24-ai-propel-plus/?utm_cta=home-heroLearn more

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

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

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