B — https://nextjs.org | BeaverCheck Audit

Site Health

Score: 83 / 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)

'unsafe-eval' found in script source

Security › Content Security Policy

'unsafe-inline' found in script source

Security › Content Security Policy

6 image-only link(s) without alt text

Accessibility › Link & Button Quality

Cross-Origin-Embedder-Policy header is missing

Security › Security Headers

Cross-Origin-Opener-Policy header is missing

Security › Security Headers

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[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fnextjs.org)](https://beavercheck.com/results/ab209dee-70ec-4ca1-aa3e-e312322da4cf)

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

100

Accessibility

Best Practices

100

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.

1.53 s

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

4.83 s

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

497 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.

3.24 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.

4.91 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.

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:62.956 source:map[column:158590 line:2 type:source-location url:https://nextjs.org/_next/static/chunks/0jzm94qus19um.js?dpl=dpl_76REKkd1QYthvffCGiAYfiJAQnff 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:60.732 source:map[column:2290 line:1 type:source-location url:https://nextjs.org/_next/static/chunks/1orfi54spy-9q.js?dpl=dpl_76REKkd1QYthvffCGiAYfiJAQnff urlProvider:network]] map[reflowTime:2.224 source:map[column:17551 line:5 type:source-location url:https://nextjs.org/_next/static/chunks/1orfi54spy-9q.js?dpl=dpl_76REKkd1QYthvffCGiAYfiJAQnff urlProvider:network]] map[reflowTime:42.354 source:map[column:8110 line:1 type:source-location url:https://nextjs.org/_next/static/chunks/0ex1ebvvwlx1p.js?dpl=dpl_76REKkd1QYthvffCGiAYfiJAQnff 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

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
/_next/static/chunks/212x3e4b5gan0.css?dpl=dpl_76REKkd1QY...	64.0 KiB	450 ms
/_next/static/chunks/0n05iy5sfwldo.css?dpl=dpl_76REKkd1QY...	19.6 KiB	150 ms
/_next/static/chunks/1ulxm8je42reo.css?dpl=dpl_76REKkd1QY...	1.9 KiB
/_next/static/chunks/1x4k0xb44_f65.css?dpl=dpl_76REKkd1QY...	2.9 KiB

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

Request	Cache TTL	Transfer Size
cdn.cr-relay.com/v1/site/f6dd8ada-7a97-4d9d-8ec4-9c2bff6cd234/signals.js	3600.0 s	7.1 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 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%2Fassets.vercel.com%2Fimage%...	121.2 KiB	118.3 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%2Fassets.vercel.com%2Fimage%...	44.1 KiB	43.7 KiB
A Next.js starter from create-next-app. `div.flex > div.flex > div.flex > img.templates-module__f0q_8W__image`	/_next/image?url=https%3A%2F%2Fassets.vercel.com%2Fimage%...	16.3 KiB	16.1 KiB
A tree structure of 3D spheres are connected by lines `div > a.features-module__KQTBcq__card > div > img.features-module__KQTBcq__lightMode`	/_next/image?url=https%3A%2F%2Fassets.vercel.com%2Fimage%...	18.3 KiB	15.1 KiB

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

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: 150 ms 84.3 KiB

URL	Transfer Size	Est Savings
/_next/static/chunks/3u5w_3-w5-c9r.js?dpl=dpl_76REKkd1QYt...	34.3 KiB	34.1 KiB
/_next/static/chunks/40o-_3kv1gk7b.js?dpl=dpl_76REKkd1QYt...	47.0 KiB	27.2 KiB
/_next/static/chunks/0jzm94qus19um.js?dpl=dpl_76REKkd1QYt...	71.1 KiB	23.0 KiB

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

URL	Total CPU Time	Script Evaluation	Script Parse
/_next/static/chunks/0jzm94qus19um.js?dpl=dpl_76REKkd1QYt...	2.0 s	1.5 s	25 ms
nextjs.org/	1.6 s	83 ms	30 ms
/_next/static/chunks/0q8fapokcqhvs.js?dpl=dpl_76REKkd1QYt...	1.1 s	190 ms	3.5 ms
Unattributable	691 ms	20 ms	0.0 ms
/_next/static/chunks/40o-_3kv1gk7b.js?dpl=dpl_76REKkd1QYt...	298 ms	194 ms	20 ms
/_next/static/chunks/3q8mh8bmyn5n6.js?dpl=dpl_76REKkd1QYt...	79 ms	49 ms	17 ms
/_next/static/chunks/1orfi54spy-9q.js?dpl=dpl_76REKkd1QYt...	51 ms	8.2 ms	6.7 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	2.2 s
Other	1.8 s
Style & Layout	1.3 s
Rendering	409 ms
Script Parsing & Compilation	202 ms
Parse HTML & CSS	111 ms
Garbage Collection	23 ms

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.

Estimated savings: 0.0 ms 14.9 KiB

URL	Transfer Size	Est Savings
/_next/static/chunks/0n05iy5sfwldo.css?dpl=dpl_76REKkd1QY...	19.3 KiB	14.9 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

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,033 KiB

●Avoid long main-thread tasks 10 long tasks found

●Avoid non-composited animations 7 animated elements found

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

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 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 0 ms

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○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.

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
▲ ~ npx create-next-app@latest `div.intro-module__l-DIkW__intro > div.flex > div.flex > button.intro-module__l-DIkW__copy`
Built-in Optimizations Automatic Image, Font, and Script Optimizations for impr… `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`
React Server Components Add components without sending additional client-side J… `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

●`[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 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

○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

○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

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
nextjs.org/api/get-session	`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

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

○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

●Image elements have `[alt]` attributes

●Document has a valid `hreflang`

○robots.txt is valid

○Document has a valid `rel=canonical`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

Best Practices

100

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.

385 ms

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

745 ms

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

85 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.

656 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.07 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.

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

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
/_next/static/chunks/1x4k0xb44_f65.css?dpl=dpl_76REKkd1QY...	2.9 KiB
/_next/static/chunks/212x3e4b5gan0.css?dpl=dpl_76REKkd1QY...	63.8 KiB	80 ms
/_next/static/chunks/0n05iy5sfwldo.css?dpl=dpl_76REKkd1QY...	20.9 KiB
/_next/static/chunks/1ulxm8je42reo.css?dpl=dpl_76REKkd1QY...	690 B

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

Request	Cache TTL	Transfer Size
cdn.cr-relay.com/v1/site/f6dd8ada-7a97-4d9d-8ec4-9c2bff6cd234/signals.js	3600.0 s	7.1 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 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%2Fassets.vercel.com%2Fimage%...	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%2Fmedia%2Fpreview-dice...	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%2Fmedia%2Fpreview-wapo...	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%2Fassets.vercel.com%2Fimage%...	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%2Fmedia%2Fpreview-audi...	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%2Fmedia%2Fpreview-noti...	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.

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.

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: 40 ms 107.8 KiB

URL	Transfer Size	Est Savings
/_next/static/chunks/3u5w_3-w5-c9r.js?dpl=dpl_76REKkd1QYt...	34.3 KiB	34.1 KiB
/_next/static/chunks/40o-_3kv1gk7b.js?dpl=dpl_76REKkd1QYt...	47.0 KiB	25.5 KiB
/_next/static/chunks/0dliohh_uup9_.js?dpl=dpl_76REKkd1QYt...	25.4 KiB	25.1 KiB
/_next/static/chunks/0jzm94qus19um.js?dpl=dpl_76REKkd1QYt...	71.1 KiB	23.2 KiB

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
Other	773 ms
Script Evaluation	636 ms
Style & Layout	441 ms
Rendering	181 ms
Script Parsing & Compilation	53 ms
Parse HTML & CSS	35 ms
Garbage Collection	14 ms

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.

Estimated savings: 0.0 ms 13.0 KiB

URL	Transfer Size	Est Savings
/_next/static/chunks/0n05iy5sfwldo.css?dpl=dpl_76REKkd1QY...	19.3 KiB	13.0 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 1.1 s

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 1,329 KiB

●JavaScript execution time 0.6 s

●Avoid long main-thread tasks 4 long tasks found

●Avoid non-composited animations 10 animated elements found

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

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 20 ms

●Server Backend Latencies 20 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 0 ms

○INP breakdown

○LCP request discovery

○User Timing marks and measures

○Avoid large layout shifts

Accessibility

Contrast

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

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.

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

●`[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

○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

○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.

	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%2Fmedia%2Fpreview-dice...	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%2Fmedia%2Fpreview-audi...	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%2Fmedia%2Fpreview-sono...	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%2Fmedia%2Fpreview-toda...	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%2Fmedia%2Fpreview-ph.3...	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

Source	Description
nextjs.org/api/get-session	`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

●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

●Ensure proper origin isolation with COOP

●Mitigate DOM-based XSS with Trusted Types

●Page has valid source maps

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

○Mitigate clickjacking with XFO or CSP

○Detected JavaScript libraries

100

SEO

○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`

Results for https://nextjs.org

Site Health

Top Priorities (5)

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

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Best Practices

General

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