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Audit Complete

Results for https://skype.com

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Spain Spain · Madrid Completed: Apr 16, 2026 16:58 UTC
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Mobile 375 × 812

Screenshot of the audited page (Mobile 375×812)

Desktop 1440 × 900

Screenshot of the audited page (Desktop 1440×900)
C75

Site Health

Score: 75 / 100

Based on 8 categories, 0 sections

Decent speed, but optimizing further could improve engagement.

Several missing protections leave your users and data exposed.

Several issues make your site difficult for assistive technology users.

Solid SEO basics — a few optimizations could boost rankings.

Solid infrastructure — fast server responses across the board.

Mostly compliant — a few items need attention.

Rich content metadata — your pages look great everywhere.

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

Azure DNS sites average 71
At average
Better than 84% of Azure DNS sites See full Azure DNS benchmark →
Facebook sites average 72
At average
Better than 72% of Facebook sites See full Facebook benchmark →

Top Priorities (5)

1

Content-Security-Policy header is missing

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

Security › Security Headers
2

No Content-Security-Policy header found

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

Security › Content Security Policy
3

4 image-only link(s) without alt text

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

Accessibility › Link & Button Quality
4

Soft 404: server returns HTTP 200 for non-existent pages

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

Accessibility › 404 Error Page
5

34 third-party resources (100% of weight)

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Inventory
View fix priority matrix

Fix Priority Matrix

5 findings

Quick Wins

2

High impact, low effort — start here.

Strategic

3

High impact, requires investment.

Easy Improvements

0

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

0

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →
BeaverCheck badge
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What fixing these means

Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Your LCP of 6.8s exceeds Google's 2.5s 'Good' threshold and the 1 performance issue below directly contributes to it. 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.

2 security gaps detected — browsers may warn visitors about your site.
2 accessibility issues exclude users who rely on assistive technology.
Your LCP is 6.8s — fixing the 1 performance critical could bring it under Google's 2.5s 'Good' threshold.

Conversion Barriers

1 critical 5 warning

6 barrier(s) likely increasing bounce by ~24%.

Speed (1)

Page takes 6.8s to load

+12% bounce

Users abandon at ~3s — you're 4.3s over the 2.5s threshold

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

Trust (2)

No HSTS header

+1% bounce

Returning visitors are briefly exposed to downgrade attacks on first request

Fix: Set Strict-Transport-Security: max-age=31536000; includeSubDomains

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

Content (2)

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

$600 investment → $5,097/month returns + USD 157,500 risk avoided

Payback period: < 1 month First-year ROI: +10094%

Investment

$600

6h · 5 findings

Monthly returns

$5,097 /mo

~$61,166 / year

  • Conversions recovered $5,097
  • Bandwidth savings $0.54

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

$100 — 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

$600

6.0 developer hours at $100/hr

Based on United States rates ($100/hr)

Quick wins
$100 2 fixes in ~60 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions
$ /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

$13,126 / month at risk

~$157,507 / year if left unfixed

Compliance Risk

$157,500

ADA Title IIICCPA/CPRA
  • Privacy Policy not detected
    CCPA/CPRA: USD 2,500 – USD 7,500
  • No <nav> landmark found
    ADA Title III: USD 25,000 – USD 150,000
  • Skip navigation link is missing (WCAG 2.4.1)
    ADA Title III: USD 25,000 – USD 150,000

+2 more

Bandwidth Waste

$0.54 /mo

6808.4 MB/mo × 0.080 USD/GB

  • Optimize transfer: save ~681 KB per page load
    Saves $0.54/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

Unique monthly visitors from your analytics

Purchases, signups, or key actions

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 4 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.

71
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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.

2.86 s

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

6.77 s

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

115 ms

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

0.000

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

2.86 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.

7.84 s

Detailed Report

Audit breakdown by category with detailed findings.

71

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.

RequestCache TTLTransfer Size
/evergreen-assets/gather/images/insider-blog/insider-blog...132150.0 s1.2 MiB
wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js300.0 s273.7 KiB
/evergreen-assets/gather/images/bento/from_skype/continue...130218.0 s193.7 KiB
/evergreen-assets/gather/videos/from_skype/hero-video-pla...123119.0 s188.7 KiB
/evergreen-assets/gather/images/bento/from_skype/continue...185484.0 s81.7 KiB
/evergreen-assets/gather/videos/from_skype/hero-video-pla...71488.0 s24.7 KiB
statics.teams.cdn.live.net/evergreen-assets/icons/Teams_Logo_v2025_80x80.png147250.0 s7.0 KiB
/evergreen-assets/gather/images/icons/from_skype/m365.svg285636.0 s3.4 KiB
/evergreen-assets/gather/images/icons/from_skype/link-mul...118956.0 s1.1 KiB
/evergreen-assets/gather/images/insider-blog/update.svg132255.0 s938 B
/evergreen-assets/gather/images/icons/from_skype/share-sc...159905.0 s1016 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/video-20.svg85249.0 s788 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/play-24.svg113705.0 s777 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/person-20.svg177587.0 s870 B
/evergreen-assets/gather/images/icons/from_skype/teams-lo...367073.0 s1.3 KiB
/evergreen-assets/gather/images/icons/from_skype/chat-mul...403211.0 s1.3 KiB
/evergreen-assets/gather/images/icons/from_skype/arrow-do...339773.0 s1.0 KiB
/evergreen-assets/gather/images/icons/from_skype/emoji-la...477382.0 s1.2 KiB
/evergreen-assets/gather/images/icons/number-symbol-squar...279183.0 s886 B
/evergreen-assets/gather/images/icons/from_skype/video.svg422402.0 s974 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/video-28.svg395664.0 s829 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/pause-24.svg470866.0 s766 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.

URLResource SizeEst Savings
See what's new! Read about new features and improvements in Teams Updates div.gather-layout > main.gather-layout__main > div.gather-layout__main__inner > div.gather-whats-new-section
/evergreen-assets/gather/images/insider-blog/insider-blog...1.2 MiB1.0 MiB
div.gather-bento-grid > div.gather-bento-grid__item > p > img.gather-bento-image div.gather-bento-grid > div.gather-bento-grid__item > p > img.gather-bento-image
/evergreen-assets/gather/images/bento/from_skype/continue...81.1 KiB59.2 KiB
Continue your Skype conversations in Teams main.gather-layout__main > div.gather-layout__main__inner > div.gather-bento-grid > div.gather-bento-grid__item
/evergreen-assets/gather/images/bento/from_skype/continue...193.2 KiB38.0 KiB
div.gather-hero__media > div.gather-hero__media__inner > picture#SKYPE-GATHER-HERO-VIDEO-PLACEHOLDER > img.gather-hero-placeholder-img div.gather-hero__media > div.gather-hero__media__inner > picture#SKYPE-GATHER-HERO-VIDEO-PLACEHOLDER > img.gather-hero-placeholder-img
/evergreen-assets/gather/videos/from_skype/hero-video-pla...24.3 KiB13.6 KiB
header#GATHER_LAYOUT_HEADER > div.gather-layout__header__inner > a.gather-layout__header__title > img.gather-layout__header__title__image header#GATHER_LAYOUT_HEADER > div.gather-layout__header__inner > a.gather-layout__header__title > img.gather-layout__header__title__image
statics.teams.cdn.live.net/evergreen-assets/icons/Teams_Logo_v2025_80x80.png6.5 KiB6.2 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-3-IMG
nodeLabel: div.gather-hero__media > div.gather-hero__media__inner > picture#SKYPE-GATHER-HERO-VIDEO-PLACEHOLDER > img.gather-hero-placeholder-img
path: 1,HTML,1,BODY,0,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,2,PICTURE,4,IMG
selector: div.gather-hero__media > div.gather-hero__media__inner > picture#SKYPE-GATHER-HERO-VIDEO-PLACEHOLDER > img.gather-hero-placeholder-img
snippet: <img alt="" aria-hidden="true" loading="lazy" src="https://statics.teams.cdn.live.net/evergreen-assets/gather/videos/from_sky…" class="gather-hero-placeholder-img">

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
value: No additional origins are good candidates for preconnecting

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: 2.0 s

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 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: 150 ms 23.8 KiB
URLTransfer SizeEst Savings
/teams-modular-packages/hashed-assets/688-aefeb25c1246ebc...32.2 KiB23.8 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 reasonFailure type
The page has an unload handler in the main frame.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 2.5 KiB

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
Modern HTTP
Render blocking requests
Optimize viewport for mobile
Minify JavaScript
Reduce unused CSS
Avoids enormous network payloads Total size was 2,216 KiB
JavaScript execution time 0.4 s
Minimizes main-thread work 1.1 s
Avoid long main-thread tasks 3 long tasks found
Image elements have explicit `width` and `height`
Network Requests
Network Round Trip Times 130 ms
Server Backend Latencies 700 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 30 ms
INP breakdown
User Timing marks and measures
Avoid non-composited animations
Avoid large layout shifts
100

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.

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>`
`[role]`s have all required `[aria-*]` attributes
`[role]` values are valid
Buttons have an accessible name
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[aria-hidden="true"]` elements do not contain focusable descendents
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 have a discernible name
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
`[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
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
Elements use only permitted 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
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
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.
Image elements have `[alt]` attributes
Input buttons have discernible text.
`<input type="image">` elements have `[alt]` text
Form elements have associated labels
Links are distinguishable without relying on color.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
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.
81

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
Unload event listeners are deprecated and will be removed.
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 browser errors logged to the console
No issues in the `Issues` panel in Chrome Devtools
Ensure CSP is effective against XSS attacks
Ensure proper origin isolation with COOP
Page has valid source maps
Redirects HTTP traffic to HTTPS
Use a strong HSTS policy
Mitigate clickjacking with XFO or CSP
Mitigate DOM-based XSS with Trusted Types
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
Document has a valid `hreflang`
Document has a valid `rel=canonical`
Image elements have `[alt]` attributes

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

90
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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.

1.01 s

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

1.85 s

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

5 ms

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

0.000

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

1.01 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.

2.03 s

Detailed Report

Audit breakdown by category with detailed findings.

90

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.

RequestCache TTLTransfer Size
/evergreen-assets/gather/images/insider-blog/insider-blog...132135.0 s1.2 MiB
wcpstatic.microsoft.com/mscc/lib/v2/wcp-consent.js300.0 s273.7 KiB
/evergreen-assets/gather/images/bento/from_skype/continue...130203.0 s193.7 KiB
/evergreen-assets/gather/videos/from_skype/hero-video-pla...123104.0 s188.7 KiB
/evergreen-assets/gather/images/bento/from_skype/continue...185469.0 s81.7 KiB
/evergreen-assets/gather/images/bento/from_skype/web-coll...522277.0 s144.6 KiB
/evergreen-assets/gather/images/bento/from_skype/share-me...475857.0 s80.3 KiB
/evergreen-assets/gather/images/bento/from_skype/video-ca...345135.0 s58.1 KiB
/evergreen-assets/gather/images/bento/from_skype/chat-the...430669.0 s49.2 KiB
/evergreen-assets/gather/images//bento/share-meeting-bg.webp106090.0 s11.6 KiB
statics.teams.cdn.live.net/evergreen-assets/icons/Teams_Logo_v2025_80x80.png147235.0 s7.0 KiB
/evergreen-assets/gather/images/bento/from_skype/document...502174.0 s17.2 KiB
/evergreen-assets/gather/images/icons/from_skype/m365.svg285621.0 s3.4 KiB
/evergreen-assets/gather/images/icons/from_skype/link-mul...118941.0 s1.1 KiB
statics.teams.cdn.live.net/evergreen-assets/gather/images/privacy-options.svg127079.0 s946 B
/evergreen-assets/gather/images/insider-blog/update.svg132240.0 s939 B
/evergreen-assets/gather/images/icons/from_skype/share-sc...159890.0 s1017 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/video-20.svg85234.0 s788 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/play-24.svg113690.0 s777 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/person-20.svg177572.0 s869 B
/evergreen-assets/gather/images/icons/from_skype/teams-lo...367058.0 s1.3 KiB
/evergreen-assets/gather/images/icons/from_skype/chat-mul...403196.0 s1.3 KiB
/evergreen-assets/gather/images/icons/from_skype/arrow-do...339758.0 s1.0 KiB
/evergreen-assets/gather/images/icons/from_skype/emoji-la...477367.0 s1.2 KiB
/evergreen-assets/gather/images/icons/number-symbol-squar...279168.0 s887 B
/evergreen-assets/gather/images/icons/from_skype/video.svg422387.0 s974 B
/evergreen-assets/gather/images/icons/arrow-download-fill...382554.0 s852 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/video-28.svg395649.0 s829 B
/evergreen-assets/gather/images/icons/question-circle-fil...395120.0 s812 B
statics.teams.cdn.live.net/evergreen-assets/gather/images/icons/pause-24.svg470851.0 s765 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.

URLResource SizeEst Savings
See what's new! Read about new features and improvements in Teams Updates div.gather-layout > main.gather-layout__main > div.gather-layout__main__inner > div.gather-whats-new-section
/evergreen-assets/gather/images/insider-blog/insider-blog...1.2 MiB1.0 MiB
div.gather-hero__media > div.gather-hero__media__inner > picture#SKYPE-GATHER-HERO-VIDEO-PLACEHOLDER > img.gather-hero-placeholder-img div.gather-hero__media > div.gather-hero__media__inner > picture#SKYPE-GATHER-HERO-VIDEO-PLACEHOLDER > img.gather-hero-placeholder-img
/evergreen-assets/gather/videos/from_skype/hero-video-pla...189.4 KiB168.6 KiB
div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image
/evergreen-assets/gather/images/bento/from_skype/web-coll...145.1 KiB139.4 KiB
div.gather-bento-grid > div.gather-bento-grid__item > p > img.gather-bento-image div.gather-bento-grid > div.gather-bento-grid__item > p > img.gather-bento-image
/evergreen-assets/gather/images/bento/from_skype/continue...81.1 KiB57.6 KiB
div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image
/evergreen-assets/gather/images/bento/from_skype/share-me...79.7 KiB55.5 KiB
div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image
/evergreen-assets/gather/images/bento/from_skype/video-ca...57.5 KiB53.6 KiB
div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image
/evergreen-assets/gather/images/bento/from_skype/chat-the...48.6 KiB43.7 KiB
Continue your Skype conversations in Teams main.gather-layout__main > div.gather-layout__main__inner > div.gather-bento-grid > div.gather-bento-grid__item
/evergreen-assets/gather/images/bento/from_skype/continue...193.2 KiB38.0 KiB
div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image div.gather-bento-grid > div.gather-bento-grid__item > p.gather-hide-when-media-mobile > img.gather-bento-image
/evergreen-assets/gather/images/bento/from_skype/document...16.6 KiB10.9 KiB
header#GATHER_LAYOUT_HEADER > div.gather-layout__header__inner > a.gather-layout__header__title > img.gather-layout__header__title__image header#GATHER_LAYOUT_HEADER > div.gather-layout__header__inner > a.gather-layout__header__title > img.gather-layout__header__title__image
statics.teams.cdn.live.net/evergreen-assets/icons/Teams_Logo_v2025_80x80.png6.5 KiB6.4 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-1-IMG
nodeLabel: div.gather-hero__media > div.gather-hero__media__inner > picture#SKYPE-GATHER-HERO-VIDEO-PLACEHOLDER > img.gather-hero-placeholder-img
path: 1,HTML,1,BODY,0,DIV,1,MAIN,0,DIV,0,DIV,0,DIV,0,DIV,2,PICTURE,4,IMG
selector: div.gather-hero__media > div.gather-hero__media__inner > picture#SKYPE-GATHER-HERO-VIDEO-PLACEHOLDER > img.gather-hero-placeholder-img
snippet: <img alt="" aria-hidden="true" loading="lazy" src="https://statics.teams.cdn.live.net/evergreen-assets/gather/videos/from_sky…" class="gather-hero-placeholder-img">

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
value: No additional origins are good candidates for preconnecting

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

Diagnostics

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: 40 ms 43.9 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 reasonFailure type
The page has an unload handler in the main frame.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 2.5 KiB

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: 762 ms
Time to Interactive 2.0 s
Layout shift culprits
Optimize DOM size
Font display
Forced reflow
LCP breakdown
Modern HTTP
Render blocking requests
Optimize viewport for mobile
Max Potential First Input Delay 60 ms
Minify JavaScript
Reduce unused CSS
Avoids enormous network payloads Total size was 2,555 KiB
JavaScript execution time 0.1 s
Minimizes main-thread work 0.4 s
Avoid long main-thread tasks 2 long tasks found
Image elements have explicit `width` and `height`
Network Requests
Network Round Trip Times 130 ms
Server Backend Latencies 240 ms
Tasks
Diagnostics
Metrics
Screenshot Thumbnails
Final Screenshot
Script Treemap Data
Resources Summary
Initial server response time was short Root document took 40 ms
Avoid large layout shifts 1 layout shift found
INP breakdown
User Timing marks and measures
Avoid non-composited animations
100

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.

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>`
`[role]`s have all required `[aria-*]` attributes
`[role]` values are valid
Buttons have an accessible name
`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
`[aria-hidden="true"]` elements do not contain focusable descendents
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 have a discernible name
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
`[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
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
Elements use only permitted 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
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
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.
Image elements have `[alt]` attributes
Input buttons have discernible text.
`<input type="image">` elements have `[alt]` text
Form elements have associated labels
Links are distinguishable without relying on color.
Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
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.
81

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
Unload event listeners are deprecated and will be removed.
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 browser errors logged to the console
No issues in the `Issues` panel in Chrome Devtools
Ensure CSP is effective against XSS attacks
Ensure proper origin isolation with COOP
Page has valid source maps
Redirects HTTP traffic to HTTPS
Use a strong HSTS policy
Mitigate clickjacking with XFO or CSP
Mitigate DOM-based XSS with Trusted Types
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
Document has a valid `hreflang`
Document has a valid `rel=canonical`
Image elements have `[alt]` attributes

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