Lighthouse Mobile

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

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.

Request	Cache TTL	Transfer Size
www.vdwoude.eu/authy/images/cor.png	0.0 ms	122.9 KiB
www.vdwoude.eu/authy/images/pc3-nl-30.png	0.0 ms	41.1 KiB
www.vdwoude.eu/leidraad/leidraad.jpg	0.0 ms	39.0 KiB
www.vdwoude.eu/authy/images/pc2-nl-25.png	0.0 ms	35.7 KiB
www.vdwoude.eu/authy/images/asl-logo.jpg	0.0 ms	33.5 KiB
www.vdwoude.eu/authy/images/gps-logo.png	0.0 ms	33.3 KiB
www.vdwoude.eu/leidraad/ud_00.png	0.0 ms	26.8 KiB
www.vdwoude.eu/authy/images/stb-vdw-klein.jpg	0.0 ms	26.2 KiB
www.vdwoude.eu/authy/images/ew-logo.png	0.0 ms	25.4 KiB
www.vdwoude.eu/authy/images/cz-logo.jpg	0.0 ms	24.7 KiB
www.vdwoude.eu/authy/images/hwe-klein.png	0.0 ms	23.0 KiB
www.vdwoude.eu/authy/images/ecs-logo.png	0.0 ms	10.2 KiB
www.vdwoude.eu/authy/images/bbclone.png	0.0 ms	5.9 KiB
www.vdwoude.eu/authy/images/vganwb-web.svg	0.0 ms	3.2 KiB
www.vdwoude.eu/authy/styles/screen.css	0.0 ms	1017 B
www.vdwoude.eu/authy/images/bg-geel.gif	0.0 ms	848 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.

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
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/cor.png	122.6 KiB	113.0 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/pc3-nl-30.png	40.9 KiB	34.3 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/pc2-nl-25.png	35.6 KiB	29.4 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/leidraad/leidraad.jpg	38.8 KiB	29.1 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/leidraad/ud_00.png	26.6 KiB	24.0 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/gps-logo.png	33.1 KiB	23.7 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/stb-vdw-klein.jpg	26.0 KiB	21.9 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/ew-logo.png	25.3 KiB	19.1 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/asl-logo.jpg	33.4 KiB	18.7 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/cz-logo.jpg	24.5 KiB	15.7 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/hwe-klein.png	22.9 KiB	13.2 KiB
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/bbclone.png	5.8 KiB	5.2 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-12-IMG

nodeLabel: ul.rig > li > a > img

path: 1,HTML,1,BODY,3,DIV,0,UL,1,LI,0,A,0,IMG

selector: ul.rig > li > a > img

snippet: <img src="authy/images/vganwb-web.svg" alt="">

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

value: no origins were preconnected

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

value: No additional origins are good candidates for preconnecting

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
www.vdwoude.eu/authy/styles/screen.css	1017 B

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

Diagnostics

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
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/asl-logo.jpg
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/gps-logo.png
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/leidraad/leidraad.jpg
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/hwe-klein.png
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/cor.png
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/cz-logo.jpg
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/ecs-logo.png
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/pc3-nl-30.png
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/ew-logo.png
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/pc2-nl-25.png
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/vganwb-web.svg
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/stb-vdw-klein.jpg
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/stb-vdw-klein.jpg
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/leidraad/ud_00.png
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/bbclone.png

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

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: 1.7 s

URL	Time Spent
vdwoude.eu/	834 ms
www.vdwoude.eu/	890 ms
www.vdwoude.eu/	0.0 ms

●Time to Interactive 2.5 s

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Max Potential First Input Delay 20 ms

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Reduce unused JavaScript

●Avoids enormous network payloads Total size was 456 KiB

●JavaScript execution time 0.0 s

●Minimizes main-thread work 0.3 s

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 30 ms

●Server Backend Latencies 140 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 70 ms

●Avoid large layout shifts 2 layout shifts found

○INP breakdown

○User Timing marks and measures

○Avoid long main-thread tasks

○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.

Contrast

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
www.vdwoude.eu Home `body > div.he1`
div#header > form.frm-login > div#usnm > input.login `div#header > form.frm-login > div#usnm > input.login`
div#header > form.frm-login > div#pswd > input.login `div#header > form.frm-login > div#pswd > input.login`
Klik op de afbeelding van uw keuze `body > div.he3`
Luc van der Woude \| 2026 © Elway-Nova \| `body > div#footer > div.he2 > b`

These are opportunities to improve the legibility of your content.

Internationalization and localization

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

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

Best practices

One main landmark helps screen reader users navigate a web page. Learn more about landmarks.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
html `html`

These items highlight common accessibility best practices.

○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-hidden="true"]` is not present on the document `<body>`

●Image elements have `[alt]` attributes

●Input buttons have discernible text.

●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.

●Document has a `<title>` element

●Links are distinguishable without relying on color.

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●Touch targets have sufficient size and spacing.

●The page contains a heading, skip link, or landmark region

○`[accesskey]` values are unique

○`[aria-*]` attributes match their roles

○`button`, `link`, and `menuitem` elements have accessible names

○ARIA attributes are used as specified for the element's role

○Deprecated ARIA roles were not used

○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

○`[aria-hidden="true"]` elements do not contain focusable descendents

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements use only permitted ARIA attributes

○`[role]`s have all required `[aria-*]` attributes

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

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

○`[role]` values are valid

○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

○`[aria-*]` attributes have valid values

○`[aria-*]` attributes are valid and not misspelled

○Buttons have an accessible name

○`<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

○Heading elements appear in a sequentially-descending order

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

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○`<input type="image">` elements have `[alt]` text

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○No element has a `[tabindex]` value greater than 0

○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.

○Identical links have the same purpose.

○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

Trust and Safety

All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding mixed content, where some resources are loaded over HTTP despite the initial request being served over HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs. Learn more about HTTPS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Insecure URL	Request Resolution
www.vdwoude.eu/	Allowed

User Experience

Image natural dimensions should be proportional to the display size and the pixel ratio to maximize image clarity. Learn how to provide responsive images.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Displayed size	Actual size	Expected size
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/pc3-nl-30.png	185 x 219	185 x 219	278 x 329
ul.rig > li > a > img `ul.rig > li > a > img`	www.vdwoude.eu/authy/images/stb-vdw-klein.jpg	263 x 97	263 x 97	395 x 146

●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

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●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 clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Detected JavaScript libraries

100

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.

○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 have descriptive text

●Links are crawlable

●robots.txt is valid

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○Document has a valid `rel=canonical`