C — https://www.trello.com | BeaverCheck Audit

Site Health

Score: 72 / 100

Based on 8 categories, 0 sections

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.

Top Priorities (5)

Content-Security-Policy header is missing

Security › Security Headers

No Content-Security-Policy header found

Security › Content Security Policy

1 control(s) without accessible label

Accessibility › Form Accessibility

2 link(s) with no accessible text

Accessibility › Link & Button Quality

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

Accessibility › 404 Error Page

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Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fwww.trello.com)](https://beavercheck.com/results/b2afdeb4-c100-3934-143f-3f3bed7f0bc6)

HTML

<a href="https://beavercheck.com/results/b2afdeb4-c100-3934-143f-3f3bed7f0bc6"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fwww.trello.com" alt="BeaverCheck Score"></a>

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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.

3.91 s

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

3.91 s

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

2.04 s

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.

3.91 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.

16.24 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.

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

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

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

URL	Est Savings
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	40 ms

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:73.012 source:map[column:20 line:15 type:source-location url:_lighthouse-eval.js urlProvider:network]]]

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:0.518 source:map[column:153 line:534 type:source-location url:https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js urlProvider:network]] map[reflowTime:0.91 source:map[type:text value:[unattributed]]] map[reflowTime:2.735 source:map[column:33031 line:15 type:source-location url:https://atl-global.atlassian.com/js/2.313.0/xid/atl-xid.js urlProvider:network]] map[reflowTime:70.277 source:map[column:32540 line:15 type:source-location url:https://atl-global.atlassian.com/js/2.313.0/xid/atl-xid.js urlProvider:network]]]

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.

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

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

Request	Cache TTL	Transfer Size
/js/2.263.0/gasv3/analytics-web-client.with-deps.amd.min.js	300.0 s	37.1 KiB
atl-global.atlassian.com/js/2.313.0/feature-gate/featureGateClient.min.js	300.0 s	31.0 KiB
atl-global.atlassian.com/js/2.313.0/web-config/webConfigClient.min.js	300.0 s	19.2 KiB
atl-global.atlassian.com/js/atl-global.min.js	300.0 s	16.3 KiB
atl-global.atlassian.com/js/2.263.0/xid/atl-xid.js	300.0 s	13.8 KiB
atl-global.atlassian.com/js/2.313.0/xid/atl-xid.js	300.0 s	13.7 KiB
atl-onetrust-wrapper.atlassian.com/assets/atl-onetrust-wrapper.min.js	86400.0 s	32.4 KiB
atl-global.atlassian.com/js/2.263.0/atl-global-2.263.0.min.js	300.0 s	9.8 KiB
www.gstatic.com/recaptcha/api2/logo_48.png	604800.0 s	2.3 KiB

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

	URL	Resource Size	Est Savings
An illustration showing email magic `div.UiCalloutstyles__Callout-sc-180dw8j-0 > div.UiCalloutstyles__CalloutMedia-sc-180dw8j-1 > picture > img.Picture__Image-sc-1wdxyb4-0`	/rz1oowkt5gyp/2QvggeQ9nzUdaDnhJCSUwA/3ef97067e1aa3d0a5e6a...	246.6 KiB	236.9 KiB
Illustration of a team Trello Board `div.UiBlockstyles__Block-sc-1xmll5s-0 > div.Stack-sc-98g4c-0 > picture > img.Picture__Image-sc-1wdxyb4-0`	/rz1oowkt5gyp/7lpUSxVqNRggpqzCNcnfo1/04cf35d0a0ef60e18c65...	150.6 KiB	134.9 KiB

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.

URL	Transfer Size	Duration
/recaptcha/api.js?render=6Le9VxMnAAAAALKRlj8jmKwUYmFTZWcF...	1.6 KiB	841 ms

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.

Estimated savings: 857 ms

URL	Time Spent
www.trello.com/	857 ms
trello.com/	0.0 ms

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.

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.

TTI

Diagnostics

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.

URL	Total CPU Time	Script Evaluation	Script Parse
/js/vendors.b0b83a2116ee27958c23.min.js	1.8 s	1.7 s	12 ms
trello.com/	797 ms	43 ms	0.6 ms
Unattributable	658 ms	43 ms	0.0 ms
/js/UiListCarousel.99ed7793f6d67ac442b5.min.js	599 ms	551 ms	3.8 ms
atl-global.atlassian.com/js/2.313.0/xid/atl-xid.js	343 ms	1.4 ms	15 ms
bxp-content-static.prod.public.atl-paas.net/js/main.6bf254a1eb35d2372aa5.min.js	335 ms	315 ms	9.8 ms
www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js	305 ms	151 ms	82 ms
www.googletagmanager.com/gtm.js?id=GTM-PJ8M5SK	197 ms	153 ms	43 ms
atl-global.atlassian.com/js/atl-global.min.js	108 ms	89 ms	6.7 ms
/js/UiHeaderNav.72558e1bf02d3433476c.min.js	102 ms	1.6 ms	5.7 ms
atl-onetrust-wrapper.atlassian.com/assets/atl-onetrust-wrapper.min.js	53 ms	37 ms	9.2 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

Category	Time Spent
Script Evaluation	3.4 s
Other	962 ms
Style & Layout	780 ms
Script Parsing & Compilation	363 ms
Garbage Collection	197 ms
Parse HTML & CSS	91 ms
Rendering	88 ms

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Estimated savings: 0.0 ms 265.5 KiB

URL	Transfer Size	Est Savings
www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js	362.6 KiB	179.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-PJ8M5SK	158.0 KiB	86.2 KiB

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

●Layout shift culprits

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Avoids enormous network payloads Total size was 2,424 KiB

●Avoid long main-thread tasks 20 long tasks found

●Avoid non-composited animations 6 animated elements found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 90 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

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

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid large layout shifts

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

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Failing Elements
Inbox `div.Carouselstyles__Slide-sc-z6wsqn-3 > button.UiListCarouselstyles__LinkItem-sc-xa0ove-0 > div > h4`

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Failing Elements
Dot 2 `div.Carouselstyles__Frame-sc-z6wsqn-1 > div.Carouselstyles__Controls-sc-z6wsqn-4 > div.Carouselstyles__Dots-sc-z6wsqn-7 > button.Carouselstyles__Dot-sc-z6wsqn-8`
Dot 3 `div.Carouselstyles__Frame-sc-z6wsqn-1 > div.Carouselstyles__Controls-sc-z6wsqn-4 > div.Carouselstyles__Dots-sc-z6wsqn-7 > button.Carouselstyles__Dot-sc-z6wsqn-8`
Dot 2 `div.Carouselstyles__Frame-sc-z6wsqn-1 > div.Carouselstyles__Controls-sc-z6wsqn-4 > div.Carouselstyles__Dots-sc-z6wsqn-7 > button.Carouselstyles__Dot-sc-z6wsqn-8`
Dot 3 `div.Carouselstyles__Frame-sc-z6wsqn-1 > div.Carouselstyles__Controls-sc-z6wsqn-4 > div.Carouselstyles__Dots-sc-z6wsqn-7 > button.Carouselstyles__Dot-sc-z6wsqn-8`

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Failing Elements
Sign up - it’s free! `div.grid__StyledColumn-sc-p40pqe-2 > form.UiEmailSignupstyles__Form-sc-9nggyw-0 > div.link-buttonstyles__BxpButton-sc-1utqn26-1 > button`
Read the story `figure.UiSocialProofstyles__QuoteFigure-sc-fym1cs-4 > figcaption.UiSocialProofstyles__QuoteCaption-sc-fym1cs-3 > div.UiSocialProofstyles__QuoteImageLink-sc-fym1cs-5 > a`
Sign up - it’s free! `div.grid__StyledColumn-sc-p40pqe-2 > form.UiEmailSignupstyles__Form-sc-9nggyw-0 > div.link-buttonstyles__BxpButton-sc-1utqn26-1 > button`

○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.

●Select elements have associated label elements.

●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

●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

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

●Document has a main landmark.

●Deprecated ARIA roles were not used

●`<video>` elements contain a `<track>` element with `[kind="captions"]`

○`[accesskey]` values are unique

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

○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 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

○Form elements have associated labels

○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

○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.

○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

Source	Description
trello.com/	`Access to XMLHttpRequest at 'https://www.atlassian.com/endpoint/atlglobalload' from origin 'https://trello.com' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.`
www.atlassian.com/endpoint/atlglobalload	`Failed to load resource: net::ERR_FAILED`
/1/members/me?organizations=all&organization_fields=name,...	`Failed to load resource: the server responded with a status of 400 ()`
trello.com/gateway/api/cookie-integrator/api/onetrust/jwt	`Failed to load resource: the server responded with a status of 401 ()`

●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

●Use a strong HSTS policy

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Ensure proper origin isolation with COOP

○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.

Crawling and Indexing

Search engines may use `href` attributes on links to crawl websites. Ensure that the `href` attribute of anchor elements links to an appropriate destination, so more pages of the site can be discovered. Learn how to make links crawlable

Uncrawlable Link
Notice at Collection `nav.UiFooterNavstyles__SubNav-sc-15b6nfk-4 > ul > li.atl-policy-link-container > a.atl-policy-link`

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Line #	Content	Error
8	`Disallow: ^/*/recommend`	`Pattern should either be empty, start with "/" or "*"`

To appear in search results, crawlers need access to your app.

○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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

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.

1.29 s

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

1.29 s

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

88 ms

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

0.133

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

1.29 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.

2.57 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.

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

Layout shifts occur when elements move absent any user interaction. Investigate the causes of layout shifts, such as elements being added, removed, or their fonts changing as the page loads.

headings: [map[key:node label:Element subItemsHeading:map[key:extra] valueType:node] map[granularity:0.001 key:score label:Layout shift score subItemsHeading:map[key:cause valueType:text] valueType:numeric]]

items: [map[node:map[type:text value:Total] score:0.133244] map[node:map[boundingRect:map[bottom:929 height:809 left:675 right:1340 top:120 width:665] lhId:page-4-DIV nodeLabel:section.UiSectionstyles__Section-sc-4xxafg-0 > div.grid__Container-sc-p40pqe-0 > div.grid__Row-sc-p40pqe-1 > div.grid__StyledColumn-sc-p40pqe-2 path:1,HTML,1,BODY,0,DIV,3,MAIN,1,SECTION,0,DIV,0,DIV,1,DIV selector:section.UiSectionstyles__Section-sc-4xxafg-0 > div.grid__Container-sc-p40pqe-0 > div.grid__Row-sc-p40pqe-1 > div.grid__StyledColumn-sc-p40pqe-2 snippet:<div class="grid__StyledColumn-sc-p40pqe-2 iokEFl ui-column"> type:node] score:0.12984 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:1688 height:489 left:501 right:1229 top:1199 width:728] lhId:page-14-IMG nodeLabel:Illustration of a team Trello Board path:1,HTML,1,BODY,0,DIV,3,MAIN,2,DIV,1,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,1,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,PICTURE,8,IMG selector:div.UiBlockstyles__Block-sc-1xmll5s-0 > div.Stack-sc-98g4c-0 > picture > img.Picture__Image-sc-1wdxyb4-0 snippet:<img srcset="//images.ctfassets.net/rz1oowkt5gyp/7lpUSxVqNRggpqzCNcnfo1/04cf35d0a0ef60e…" src="https://images.ctfassets.net/rz1oowkt5gyp/7lpUSxVqNRggpqzCNcnfo1/04cf35d0a…" alt="Illustration of a team Trello Board" width="1092" height="733" loading="lazy" class="Picture__Image-sc-1wdxyb4-0 eYmxm"> type:node]]] type:subitems]] map[node:map[boundingRect:map[bottom:477 height:180 left:121 right:659 top:297 width:538] lhId:page-0-H1 nodeLabel:Capture, organize, and tackle your to-dos from anywhere. path:1,HTML,1,BODY,0,DIV,3,MAIN,1,SECTION,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,H1 selector:div.grid__StyledColumn-sc-p40pqe-2 > div.UiTextBlock__TextBlock-sc-18qp69o-0 > div > h1 snippet:<h1> type:node] score:0.003404 subItems:map[items:[map[cause:Unsized image element extra:map[boundingRect:map[bottom:2344 height:300 left:153 right:708 top:2044 width:555] lhId:page-13-IMG nodeLabel:An illustration showing email magic path:1,HTML,1,BODY,0,DIV,3,MAIN,3,SECTION,0,DIV,0,DIV,1,DIV,0,DIV,0,DIV,0,PICTURE,8,IMG selector:div.UiCalloutstyles__Callout-sc-180dw8j-0 > div.UiCalloutstyles__CalloutMedia-sc-180dw8j-1 > picture > img.Picture__Image-sc-1wdxyb4-0 snippet:<img srcset="//images.ctfassets.net/rz1oowkt5gyp/2QvggeQ9nzUdaDnhJCSUwA/3ef97067e1aa3d0…" src="https://images.ctfassets.net/rz1oowkt5gyp/2QvggeQ9nzUdaDnhJCSUwA/3ef97067e…" alt="An illustration showing email magic" width="555" height="300" loading="lazy" class="Picture__Image-sc-1wdxyb4-0 eYmxm"> type:node]]] type:subitems]]]

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

URL	Est Savings
fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2	40 ms

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:77.337 source:map[column:20 line:15 type:source-location url:_lighthouse-eval.js urlProvider:network]]]

headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]

items: [map[reflowTime:0.327 source:map[type:text value:[unattributed]]] map[reflowTime:2.472 source:map[column:33031 line:15 type:source-location url:https://atl-global.atlassian.com/js/2.313.0/xid/atl-xid.js urlProvider:network]] map[reflowTime:74.865 source:map[column:32540 line:15 type:source-location url:https://atl-global.atlassian.com/js/2.313.0/xid/atl-xid.js urlProvider:network]]]

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.

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

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

Request	Cache TTL	Transfer Size
/js/2.263.0/gasv3/analytics-web-client.with-deps.amd.min.js	300.0 s	37.1 KiB
atl-global.atlassian.com/js/2.313.0/feature-gate/featureGateClient.min.js	300.0 s	31.0 KiB
atl-global.atlassian.com/js/2.313.0/web-config/webConfigClient.min.js	300.0 s	19.2 KiB
atl-global.atlassian.com/js/atl-global.min.js	300.0 s	16.3 KiB
atl-global.atlassian.com/js/2.263.0/xid/atl-xid.js	300.0 s	13.8 KiB
atl-global.atlassian.com/js/2.313.0/xid/atl-xid.js	300.0 s	13.8 KiB
atl-onetrust-wrapper.atlassian.com/assets/atl-onetrust-wrapper.min.js	86400.0 s	32.4 KiB
atl-global.atlassian.com/js/2.263.0/atl-global-2.263.0.min.js	300.0 s	9.8 KiB
www.gstatic.com/recaptcha/api2/logo_48.png	604800.0 s	2.3 KiB

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

	URL	Resource Size	Est Savings
An illustration showing email magic `div.UiCalloutstyles__Callout-sc-180dw8j-0 > div.UiCalloutstyles__CalloutMedia-sc-180dw8j-1 > picture > img.Picture__Image-sc-1wdxyb4-0`	/rz1oowkt5gyp/2QvggeQ9nzUdaDnhJCSUwA/3ef97067e1aa3d0a5e6a...	116.5 KiB	89.4 KiB
Illustration of a team Trello Board `div.UiBlockstyles__Block-sc-1xmll5s-0 > div.Stack-sc-98g4c-0 > picture > img.Picture__Image-sc-1wdxyb4-0`	/rz1oowkt5gyp/7lpUSxVqNRggpqzCNcnfo1/04cf35d0a0ef60e18c65...	116.1 KiB	68.8 KiB

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.

URL	Transfer Size	Duration
/recaptcha/api.js?render=6Le9VxMnAAAAALKRlj8jmKwUYmFTZWcF...	1.6 KiB	295 ms

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.

Estimated savings: 328 ms

URL	Time Spent
www.trello.com/	328 ms
trello.com/	0.0 ms

These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to windowing. Learn how to improve CLS

Element	Layout shift score
section.UiSectionstyles__Section-sc-4xxafg-0 > div.grid__Container-sc-p40pqe-0 > div.grid__Row-sc-p40pqe-1 > div.grid__StyledColumn-sc-p40pqe-2 `section.UiSectionstyles__Section-sc-4xxafg-0 > div.grid__Container-sc-p40pqe-0 > div.grid__Row-sc-p40pqe-1 > div.grid__StyledColumn-sc-p40pqe-2`	0.130
Capture, organize, and tackle your to-dos from anywhere. `div.grid__StyledColumn-sc-p40pqe-2 > div.UiTextBlock__TextBlock-sc-18qp69o-0 > div > h1`	0.003

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.

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.

TTI

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.

Estimated savings: 0.0 ms 313.6 KiB

URL	Transfer Size	Est Savings
www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js	362.6 KiB	179.3 KiB
www.googletagmanager.com/gtm.js?id=GTM-PJ8M5SK	158.0 KiB	86.3 KiB
/js/2.263.0/gasv3/analytics-web-client.with-deps.amd.min.js	36.6 KiB	24.6 KiB
atl-global.atlassian.com/js/2.263.0/atl-global-2.263.0.min.js	33.2 KiB	23.4 KiB

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

●Optimize DOM size

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Reduce unused CSS

●Avoids enormous network payloads Total size was 2,194 KiB

●JavaScript execution time 0.6 s

●Minimizes main-thread work 1.3 s

●Avoid long main-thread tasks 4 long tasks found

●Avoid non-composited animations 6 animated elements found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 40 ms

●Server Backend Latencies 100 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 40 ms

○INP breakdown

○LCP request discovery

○User Timing marks and measures

Accessibility

Navigation

Failing Elements
Inbox `div.Stack-sc-98g4c-0 > button.UiListCarouselstyles__LinkItem-sc-xa0ove-0 > div > h4`

These are opportunities to improve keyboard navigation in your application.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Failing Elements
Dot 2 `div.Carouselstyles__Frame-sc-z6wsqn-1 > div.Carouselstyles__Controls-sc-z6wsqn-4 > div.Carouselstyles__Dots-sc-z6wsqn-7 > button.Carouselstyles__Dot-sc-z6wsqn-8`
Dot 3 `div.Carouselstyles__Frame-sc-z6wsqn-1 > div.Carouselstyles__Controls-sc-z6wsqn-4 > div.Carouselstyles__Dots-sc-z6wsqn-7 > button.Carouselstyles__Dot-sc-z6wsqn-8`
Dot 2 `div.Carouselstyles__Frame-sc-z6wsqn-1 > div.Carouselstyles__Controls-sc-z6wsqn-4 > div.Carouselstyles__Dots-sc-z6wsqn-7 > button.Carouselstyles__Dot-sc-z6wsqn-8`
Dot 3 `div.Carouselstyles__Frame-sc-z6wsqn-1 > div.Carouselstyles__Controls-sc-z6wsqn-4 > div.Carouselstyles__Dots-sc-z6wsqn-7 > button.Carouselstyles__Dot-sc-z6wsqn-8`

These items highlight common accessibility best practices.

Visible text labels that do not match the accessible name can result in a confusing experience for screen reader users. Learn more about accessible names.

Failing Elements
Sign up - it’s free! `div.grid__StyledColumn-sc-p40pqe-2 > form.UiEmailSignupstyles__Form-sc-9nggyw-0 > div.link-buttonstyles__BxpButton-sc-1utqn26-1 > button`
Read the story `figure.UiSocialProofstyles__QuoteFigure-sc-fym1cs-4 > figcaption.UiSocialProofstyles__QuoteCaption-sc-fym1cs-3 > div.UiSocialProofstyles__QuoteImageLink-sc-fym1cs-5 > a`
Sign up - it’s free! `div.grid__StyledColumn-sc-p40pqe-2 > form.UiEmailSignupstyles__Form-sc-9nggyw-0 > div.link-buttonstyles__BxpButton-sc-1utqn26-1 > button`

○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

●`[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

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

●Document has a main landmark.

●Deprecated ARIA roles were not used

●`<video>` elements contain a `<track>` element with `[kind="captions"]`

○`[accesskey]` values are unique

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

○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 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

○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.

○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

Source	Description
/1/members/me?organizations=all&organization_fields=name,...	`Failed to load resource: the server responded with a status of 400 ()`
trello.com/gateway/api/cookie-integrator/api/onetrust/jwt	`Failed to load resource: the server responded with a status of 401 ()`

●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

●Use a strong HSTS policy

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Ensure proper origin isolation with COOP

○Mitigate clickjacking with XFO or CSP

SEO

Crawling and Indexing

Uncrawlable Link
Notice at Collection `nav.UiFooterNavstyles__SubNav-sc-15b6nfk-4 > ul > li.atl-policy-link-container > a.atl-policy-link`

If your robots.txt file is malformed, crawlers may not be able to understand how you want your website to be crawled or indexed. Learn more about robots.txt.

Line #	Content	Error
8	`Disallow: ^/*/recommend`	`Pattern should either be empty, start with "/" or "*"`

To appear in search results, crawlers need access to your app.

○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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

Browse & Analyze

Learn

Results for https://www.trello.com

Site Health

Top Priorities (5)

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Navigation

Best practices

Best Practices

General

SEO

Crawling and Indexing

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Navigation

Best practices

Best Practices

General

SEO

Crawling and Indexing

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