Lighthouse Desktop

· 0 checks — Desktop 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.

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	Duration
nextjs.org/_next/static/immutable/chunks/1-vhr6_0s4o77.css	3.0 KiB
nextjs.org/_next/static/immutable/chunks/18bbf4kadgtmt.css	60.7 KiB	80 ms
nextjs.org/_next/static/immutable/chunks/3-sarejflg6w8.css	18.6 KiB
nextjs.org/_next/static/immutable/chunks/1ulxm8je42reo.css	599 B

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
nextjs.org/_stream/external/vercel.fides-cdn.ethyca.com/fides.js?geolocation=EEA	3600.0 s	58.5 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
An image gallery built on Next.js and Cloudinary. `div.flex > div.flex > div.flex > img.templates-module__f0q_8W__image`	/_next/image?url=https%3A%2F%2Fh8DxKfmAPhn8O0p3.public.bl...	121.2 KiB	116.4 KiB
Screenshot of Dice's website `div.flex > div.flex > a.showcase-preview-module__ALHlCG__preview > img`	/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2F...	61.5 KiB	48.1 KiB
Screenshot of Washington Post's website `div.flex > div.flex > a.showcase-preview-module__ALHlCG__preview > img`	/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2F...	32.1 KiB	20.2 KiB
An all-in-one starter kit for high-performance ecommerce sites. `div.flex > div.flex > div.flex > img.templates-module__f0q_8W__image`	/_next/image?url=https%3A%2F%2Fh8DxKfmAPhn8O0p3.public.bl...	19.3 KiB	18.0 KiB
Screenshot of Audible's website `div.flex > div.flex > a.showcase-preview-module__ALHlCG__preview > img`	/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2F...	23.1 KiB	14.4 KiB
Screenshot of Notion's website `div.flex > div.flex > a.showcase-preview-module__ALHlCG__preview > img`	/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2F...	22.0 KiB	13.8 KiB

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

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 12.1 KiB

URL	Transfer Size	Est Savings
nextjs.org/_next/static/immutable/chunks/3-sarejflg6w8.css	18.4 KiB	12.1 KiB

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 0.0 ms 107.7 KiB

URL	Transfer Size	Est Savings
nextjs.org/_next/static/immutable/chunks/3u6nxjif50jic.js	35.5 KiB	35.3 KiB
nextjs.org/_next/static/immutable/chunks/18l-m0dw_cn8-.js	47.9 KiB	25.8 KiB
nextjs.org/_next/static/immutable/chunks/3i65vt2e2ie0j.js	25.4 KiB	25.1 KiB
nextjs.org/_next/static/immutable/chunks/0a1x1u7w7w_b6.js	71.1 KiB	21.5 KiB

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

●Layout shift culprits

●Document request latency

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Time to Interactive 0.9 s

●Max Potential First Input Delay 50 ms

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,382 KiB

●User Timing marks and measures 5 user timings

●JavaScript execution time 0.4 s

●Minimizes main-thread work 1.6 s

●Avoid long main-thread tasks 1 long task found

●Avoid non-composited animations 9 animated elements found

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

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 0 ms

●Server Backend Latencies 30 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Avoid multiple page redirects

●Initial server response time was short Root document took 20 ms

○INP breakdown

○LCP request discovery

○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.

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
Search documentation... CtrlK `header.bg-background-100 > nav.navbar-module__cV3TuW__nav > div.navbar-module__cV3TuW__headerButtons > button.navbar-module__cV3TuW__search`

These are opportunities to improve the legibility of your content.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
▲ ~ npx create-next-app@latest `div.intro-module__l-DIkW__intro > div.flex > div.flex > button.intro-module__l-DIkW__copy`
ORIGINAL 1440PX 375PX Built-in Optimizations Automatic Image, Font, and Script … `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
Data Fetching Make your React component async and await your data. Next.js supp… `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
Server Actions Run server code by calling a function. Skip the API. Then, easil… `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
Advanced Routing & Nested Layouts Create routes using the file system, includin… `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
Dynamic HTML Streaming Instantly stream UI from the server, integrated with the… `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
CSS Support Style your application with your favorite tools, including support … `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
Route Handlers Build API endpoints to securely connect with third-party service… `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
Middleware Take control of the incoming request. Use code to define routing and… `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
React Server Components Add components without sending additional client-side J… `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
Client and Server Rendering Flexible rendering and caching options, including I… `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`
Next.js 16 The power of full-stack to the frontend. Read the release notes. `div.flex > div.features-module__KQTBcq__grid > div > a.features-module__KQTBcq__card`

○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.

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

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

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

●Elements use only permitted ARIA attributes

●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

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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

○`[accesskey]` values are unique

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

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

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

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

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

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

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

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

○ARIA IDs are unique

○No form fields have multiple labels

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

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

○Input buttons have discernible text.

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

○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.

○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.

○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

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Aspect Ratio (Displayed)	Aspect Ratio (Actual)
Screenshot of Dice's website `div.flex > div.flex > a.showcase-preview-module__ALHlCG__preview > img`	/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2F...	302 x 608 (0.50)	640 x 1311 (0.49)
Screenshot of Audible's website `div.flex > div.flex > a.showcase-preview-module__ALHlCG__preview > img`	/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2F...	388 x 316 (1.23)	640 x 512 (1.25)
Screenshot of Sonos's website `div.flex > div.flex > a.showcase-preview-module__ALHlCG__preview > img`	/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2F...	388 x 210 (1.85)	640 x 359 (1.78)
Screenshot of Today's website `div.flex > div.flex > a.showcase-preview-module__ALHlCG__preview > img`	/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2F...	179 x 125 (1.43)	192 x 145 (1.32)
Screenshot of ProductHunt's website `div.flex > div.flex > a.showcase-preview-module__ALHlCG__preview > img`	/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2F...	179 x 125 (1.43)	192 x 120 (1.60)

General

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Source	Description
nextjs.org/api/get-session	`Failed to load resource: the server responded with a status of 401 ()`
nextjs.org/ line 5, col 0	`Loading the font 'https://k2mkucxia43oc7fa.public.blob.vercel-storage.com/front/fonts/space-mono/space-mono-v11-latin-regular.woff2' violates the following Content Security Policy directive: "font-src 'self' .nextjs.org .vercel.com .gstatic.com vercel.live .vercel.sh". The action has been blocked.`

Issues logged to the `Issues` panel in Chrome Devtools indicate unresolved problems. They can come from network request failures, insufficient security controls, and other browser concerns. Open up the Issues panel in Chrome DevTools for more details on each issue.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Issue type
Content security policy

●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

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●Ensure CSP is effective against XSS attacks

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○robots.txt is valid

○Document has a valid `rel=canonical`