C — https://pl.wikipedia.org

Site Health

Score: 78 / 100

Based on 8 categories, 0 sections

Fast site — your users get a smooth experience.

Several missing protections leave your users and data exposed.

Several issues make your site difficult for assistive technology users.

Well-optimized for search — your content is discoverable.

Solid infrastructure — fast server responses across the board.

Mostly compliant — a few items need attention.

Good content signals with minor gaps.

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

HSTS · 1596 peers

You 78

Avg 74

At average

0 50 100

Better than 81% of HSTS sites See full HSTS benchmark →

jQuery · 1027 peers

You 78

Avg 73

At average

0 50 100

Better than 89% of jQuery sites See full jQuery benchmark →

Top Priorities (5)

Content-Security-Policy header is missing

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

Security › Security Headers

No Content-Security-Policy header found

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

Security › Content Security Policy

11 link(s) with no accessible text

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

Accessibility › Link & Button Quality

4 image-in-link without alt text

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

Accessibility › Alt Text Quality

7 image(s) missing alt attribute

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

Accessibility › Alt Text Quality

View fix priority matrix

Fix Priority Matrix

5 findings

Impact

Quick Wins

High impact, low effort — start here.

Strategic

High impact, requires investment.

Easy Improvements

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →

Embed this badge

Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fpl.wikipedia.org)](https://beavercheck.com/results/0cd7f26f-187a-4957-9b96-3bbb12cb64e0)

HTML

<a href="https://beavercheck.com/results/0cd7f26f-187a-4957-9b96-3bbb12cb64e0"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Fpl.wikipedia.org" alt="BeaverCheck Score"></a>

Image URL

https://beavercheck.com/badge?url=https%3A%2F%2Fpl.wikipedia.org

This badge auto-updates with your latest scan result.

What fixing these means

Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. 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.

3 accessibility issues exclude users who rely on assistive technology.

Could reach Estimate based on resolving critical issues

Conversion Barriers

7 warning

7 barrier(s) likely increasing bounce by ~18%.

Speed (1)

Page loads in 3.2s

+5% bounce

Every additional 100ms above 2.5s costs conversions — you're 714ms over

Fix: Target <2.5s LCP: defer non-critical scripts and optimize the hero image

Trust (1)

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, …)

Content is hard to read

+2% bounce

Graduate-level reading difficulty — limits the addressable audience for product or blog pages

Fix: Shorten sentences; replace jargon with plain language; target Flesch ease ≥60

Navigation (3)

11 link(s) with generic text ("click here", "read more")

+1% bounce

Screen-reader users navigating by link list see no context — and search engines can't infer relevance

Fix: Rewrite with descriptive phrases that identify the destination

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

1 broken link(s) on the page

+2% bounce

Clicks land on 404s — trust drops and the session often ends

Fix: Fix or remove the broken destinations surfaced on the Content tab

Preliminary CRO audit — each barrier links to the tab with detailed analysis.

Return on Investment

PLN 825 investment → PLN 2,499/month returns + EUR 120,500,000 risk avoided

Payback period: < 1 month First-year ROI: +3535%

Investment

PLN 825

6h · 5 findings

Monthly returns

PLN 2,499 /mo

~PLN 29,988 / year

Conversions recovered PLN 2,498
Bandwidth savings PLN 0.73

Regulatory risk avoided

EUR 120,500,000

if kept compliant

ePrivacy Directive EUR 100,000,000
RODO EUR 20,000,000
EAA EUR 500,000

Payback period

0 12mo 24mo

PLN 150 — 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

zł825

5.5 developer hours at zł150/hr

Based on Poland rates (zł150/hr)

Quick wins

zł150 2 fixes in ~60 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions

Custom rate

zł /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

PLN 10,041,667 / month at risk

~PLN 120,500,009 / year if left unfixed

Compliance Risk

€120,500,000

ePrivacy DirectiveRODOEAA

No privacy policy link detected
RODO: EUR 10,000 – EUR 20,000,000
2 tracking cookie(s) set before consent interaction
RODO: EUR 5,000 – EUR 10,000,000
2 tracking cookie(s) set before consent interaction
RODO: EUR 10,000 – EUR 20,000,000

+5 more

Bandwidth Waste

PLN 0.73 /mo

2277.1 MB/mo × 0.320 PLN/GB

Optimize transfer: save ~228 KB per page load
Saves PLN 0.73/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

Monthly visitors

Unique monthly visitors from your analytics

Conversion rate (%)

Purchases, signups, or key actions

Avg. order value

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 5 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.

Performance

Accessibility

100

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.

1.20 s

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

3.21 s

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

197 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.

1.24 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.

4.11 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.

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.

Request	Cache TTL	Transfer Size
/wikipedia/commons/thumb/3/3b/Ratusz_w_Łęczycy.jpg/960p...	0.0 ms	166.2 KiB
upload.wikimedia.org/wikipedia/commons/thumb/5/57/Babur.jpg/250px-Babur.jpg	0.0 ms	41.7 KiB
/wikipedia/commons/thumb/5/5f/Elizabeth_II_greets_NASA_GS...	0.0 ms	26.1 KiB
/wikipedia/commons/thumb/f/fe/William_Tolbert_(cropped).j...	0.0 ms	26.0 KiB
/w/load.php?lang=pl&modules=startup&only=scripts&raw=1&sk...	300.0 s	21.9 KiB
/w/load.php?lang=pl&modules=ext.wikimediamessages.styles%...	300.0 s	18.3 KiB
/wikipedia/commons/thumb/6/67/WiktionaryPl_nodesc.svg/120...	0.0 ms	16.0 KiB
/wikipedia/commons/thumb/4/4b/Peter-Magyar-portrait-2026....	0.0 ms	13.7 KiB
/wikipedia/commons/thumb/d/df/Wikispecies-logo.svg/120px-...	0.0 ms	10.4 KiB
/wikipedia/commons/thumb/2/27/HMS_Roberts_NARA-45513189.j...	0.0 ms	9.6 KiB
/wikipedia/commons/thumb/3/3c/HSSamarbetecolor.svg/120px-...	0.0 ms	8.7 KiB
/wikipedia/commons/thumb/9/9e/P2N2019ClaraLuciani_06.jpg/...	0.0 ms	8.2 KiB
/wikipedia/commons/thumb/4/4d/PL_Wiki_Aktualnosci_ikona.s...	0.0 ms	8.0 KiB
/wikipedia/commons/thumb/2/28/Wikimediapolska-logo.png/12...	0.0 ms	7.7 KiB
/wikipedia/commons/thumb/3/3d/PL_Wiki_Kalendarium_ikona.s...	0.0 ms	7.7 KiB
upload.wikimedia.org/wikipedia/commons/thumb/f/f0/HSBra.svg/120px-HSBra.svg.png	0.0 ms	6.5 KiB
/wikipedia/commons/thumb/e/ee/HSUtvald.svg/120px-HSUtvald...	0.0 ms	6.3 KiB
/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/120px-W...	0.0 ms	6.2 KiB
/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/120px-Wi...	0.0 ms	6.0 KiB
/wikipedia/commons/thumb/7/75/Wikimedia_Community_Logo.sv...	0.0 ms	6.0 KiB
/wikipedia/commons/thumb/f/fa/Wikibooks-logo.svg/120px-Wi...	0.0 ms	5.8 KiB
/wikipedia/commons/thumb/7/74/PL_Wiki_InM_ikona.svg/120px...	0.0 ms	5.7 KiB
/wikipedia/commons/thumb/1/14/Wikimedia-logo-circle.svg/1...	0.0 ms	5.6 KiB
/wikipedia/commons/thumb/f/f4/PL_Wiki_CzyWiesz_ikona.svg/...	0.0 ms	5.2 KiB
/wikipedia/commons/thumb/0/0c/Wikifunctions-logo.svg/120p...	0.0 ms	4.4 KiB
/wikipedia/commons/thumb/9/91/Wikiversity-logo.svg/120px-...	0.0 ms	4.0 KiB
/w/load.php?lang=pl&modules=ext.gadget.citation-access-in...	300.0 s	3.9 KiB
/wikipedia/commons/thumb/8/81/Wikimedia-logo.svg/120px-Wi...	0.0 ms	3.6 KiB
upload.wikimedia.org/wikipedia/commons/9/9d/Commons-logo-31px.png	0.0 ms	2.9 KiB
/wikipedia/commons/thumb/d/dd/Wikivoyage-Logo-v3-icon.svg...	0.0 ms	2.4 KiB
/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/120px-Wik...	0.0 ms	1.4 KiB
pl.wikipedia.org/w/load.php?lang=pl&modules=site.styles&only=styles&skin=minerva	300.0 s	859 B

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
div > span > a.mw-file-description > img.mw-file-element `div > span > a.mw-file-description > img.mw-file-element`	/wikipedia/commons/thumb/3/3b/Ratusz_w_Łęczycy.jpg/960p...	165.0 KiB	123.0 KiB
Babur `div.floatright > span.mw-image-border > a.mw-file-description > img.mw-file-element`	upload.wikimedia.org/wikipedia/commons/thumb/5/57/Babur.jpg/250px-Babur.jpg	40.6 KiB	34.1 KiB
div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`	/wikipedia/commons/thumb/f/fe/William_Tolbert_(cropped).j...	24.8 KiB	18.2 KiB
Królowa Elżbieta II `div.floatright > span.mw-image-border > a.mw-file-description > img.mw-file-element`	/wikipedia/commons/thumb/5/5f/Elizabeth_II_greets_NASA_GS...	24.9 KiB	18.0 KiB
Wikisłownik `div > span > span > img.mw-file-element`	/wikipedia/commons/thumb/6/67/WiktionaryPl_nodesc.svg/120...	14.9 KiB	12.7 KiB
Wikispecies `div > span > span > img.mw-file-element`	/wikipedia/commons/thumb/d/df/Wikispecies-logo.svg/120px-...	9.2 KiB	6.5 KiB
div.main-head > span > span > img.mw-file-element `div.main-head > span > span > img.mw-file-element`	/wikipedia/commons/thumb/3/3c/HSSamarbetecolor.svg/120px-...	7.6 KiB	5.3 KiB
div.main-head > span > span > img.mw-file-element `div.main-head > span > span > img.mw-file-element`	/wikipedia/commons/thumb/4/4d/PL_Wiki_Aktualnosci_ikona.s...	6.9 KiB	4.6 KiB
div > span > span > img.mw-file-element `div > span > span > img.mw-file-element`	/wikipedia/commons/thumb/2/28/Wikimediapolska-logo.png/12...	6.6 KiB	4.3 KiB
div.main-head > span > span > img.mw-file-element `div.main-head > span > span > img.mw-file-element`	/wikipedia/commons/thumb/3/3d/PL_Wiki_Kalendarium_ikona.s...	6.6 KiB	4.2 KiB

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

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
pl.wikipedia.org/w/load.php?lang=pl&modules=site.styles&only=styles&skin=minerva	859 B
/w/load.php?lang=pl&modules=ext.gadget.citation-access-in...	3.9 KiB
/w/load.php?lang=pl&modules=ext.wikimediamessages.styles%...	18.3 KiB	301 ms

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.

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: 753 ms

URL	Time Spent
pl.wikipedia.org/	753 ms
pl.wikipedia.org/wiki/Wikipedia:Strona_g%C5%82%C3%B3wna	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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

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 14.5 KiB

URL	Transfer Size	Est Savings
/w/load.php?lang=pl&modules=ext.wikimediamessages.styles%...	17.5 KiB	14.5 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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	823 ms
Other	685 ms
Style & Layout	433 ms
Script Parsing & Compilation	155 ms
Parse HTML & CSS	97 ms
Rendering	54 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.

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: 0.0 ms 82.0 KiB

URL	Transfer Size	Est Savings
/w/load.php?lang=pl&modules=ext.centralNotice.choiceData%...	185.8 KiB	82.0 KiB

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.


div.donate-banner > a.donate-banner__link > picture > img.donate-banner__gif `div.donate-banner > a.donate-banner__link > picture > img.donate-banner__gif`

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

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 741 KiB

●User Timing marks and measures 1 user timing

●JavaScript execution time 0.6 s

●Avoid long main-thread tasks 9 long tasks found

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 0 ms

●Server Backend Latencies 60 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 0 ms

○INP breakdown

○LCP request discovery

○Avoid non-composited animations

○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.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div > span > a.mw-file-description > img.mw-file-element `div > span > a.mw-file-description > img.mw-file-element`

Labels ensure that form controls are announced properly by assistive technologies, like screen readers. Learn more about form element labels.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
header.header-container > div.minerva-header > nav.navigation-drawer > input#main-menu-input `header.header-container > div.minerva-header > nav.navigation-drawer > input#main-menu-input`

Link text (and alternate text for images, when used as links) that is discernible, unique, and focusable improves the navigation experience for screen reader users. Learn how to make links accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#main-page-column1 > div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description `div#main-page-column1 > div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description`
div#main-page-column2 > div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description `div#main-page-column2 > div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description`
div#main-page-column2 > div#main-page-good-article > figure.mw-halign-right > a.mw-file-description `div#main-page-column2 > div#main-page-good-article > figure.mw-halign-right > a.mw-file-description`
div#main-page-featured-image > div > span > a.mw-file-description `div#main-page-featured-image > div > span > a.mw-file-description`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

○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

●`[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 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

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Uses ARIA roles only on compatible elements

●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

○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.

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

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Image elements do not have `[alt]` attributes that are redundant text.

○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.

100

Best Practices

General

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
/w/load.php?lang=pl&modules=ext.centralNotice.choiceData%...	/w/load.php?lang=pl&modules=ext.centralNotice.choiceData%...
/w/load.php?lang=pl&modules=startup&only=scripts&raw=1&sk...	/w/load.php?lang=pl&modules=startup&only=scripts&skin=min...
/w/load.php?lang=pl&modules=ext.visualEditor.core.utils.p...	/w/load.php?lang=pl&modules=ext.visualEditor.core.utils.p...
/w/load.php?lang=pl&modules=ext.gadget.NavFrame%2CWDsearc...	/w/load.php?lang=pl&modules=ext.gadget.NavFrame%2CWDsearc...

●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 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

●Mitigate clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

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.

Content Best Practices

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div > span > a.mw-file-description > img.mw-file-element `div > span > a.mw-file-description > img.mw-file-element`

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●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`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

100

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.

354 ms

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

904 ms

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

19 ms

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

0.001

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

685 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.

1.28 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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 ▾

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.

Request	Cache TTL	Transfer Size
/wikipedia/commons/thumb/3/3b/Ratusz_w_Łęczycy.jpg/500p...	0.0 ms	52.4 KiB
upload.wikimedia.org/wikipedia/commons/3/3e/MP-open-book4.png	0.0 ms	23.5 KiB
/w/load.php?lang=pl&modules=startup&only=scripts&raw=1&sk...	300.0 s	22.0 KiB
/w/load.php?lang=pl&modules=ext.uls.interlanguage%7Cext.v...	300.0 s	20.5 KiB
upload.wikimedia.org/wikipedia/commons/thumb/5/57/Babur.jpg/120px-Babur.jpg	0.0 ms	11.8 KiB
/wikipedia/commons/thumb/5/5f/Elizabeth_II_greets_NASA_GS...	0.0 ms	8.5 KiB
/wikipedia/commons/thumb/f/fe/William_Tolbert_(cropped).j...	0.0 ms	6.9 KiB
/wikipedia/commons/thumb/4/4b/Peter-Magyar-portrait-2026....	0.0 ms	5.7 KiB
/wikipedia/commons/thumb/6/67/WiktionaryPl_nodesc.svg/40p...	0.0 ms	4.5 KiB
/wikipedia/commons/thumb/9/9e/P2N2019ClaraLuciani_06.jpg/...	0.0 ms	4.2 KiB
/wikipedia/commons/thumb/2/27/HMS_Roberts_NARA-45513189.j...	0.0 ms	4.1 KiB
/wikipedia/commons/thumb/d/df/Wikispecies-logo.svg/40px-W...	0.0 ms	3.8 KiB
/w/load.php?lang=pl&modules=ext.gadget.citation-access-in...	300.0 s	3.9 KiB
/wikipedia/commons/thumb/2/28/Wikimediapolska-logo.png/40...	0.0 ms	3.2 KiB
/wikipedia/commons/thumb/3/3c/HSSamarbetecolor.svg/40px-H...	0.0 ms	3.1 KiB
upload.wikimedia.org/wikipedia/commons/9/9d/Commons-logo-31px.png	0.0 ms	2.9 KiB
/wikipedia/commons/thumb/f/fa/Wikibooks-logo.svg/40px-Wik...	0.0 ms	2.8 KiB
/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/40px-Wi...	0.0 ms	2.8 KiB
/w/load.php?lang=pl&modules=site.styles&only=styles&skin=...	300.0 s	2.9 KiB
/wikipedia/commons/thumb/3/3d/PL_Wiki_Kalendarium_ikona.s...	0.0 ms	2.8 KiB
/wikipedia/commons/thumb/7/75/Wikimedia_Community_Logo.sv...	0.0 ms	2.7 KiB
/wikipedia/commons/thumb/f/fa/Wikiquote-logo.svg/40px-Wik...	0.0 ms	2.7 KiB
/wikipedia/commons/thumb/4/4d/PL_Wiki_Aktualnosci_ikona.s...	0.0 ms	2.7 KiB
/wikipedia/commons/thumb/1/14/Wikimedia-logo-circle.svg/4...	0.0 ms	2.6 KiB
/wikipedia/commons/thumb/e/ee/HSUtvald.svg/40px-HSUtvald....	0.0 ms	2.5 KiB
upload.wikimedia.org/wikipedia/commons/thumb/f/f0/HSBra.svg/40px-HSBra.svg.png	0.0 ms	2.5 KiB
/wikipedia/commons/thumb/7/74/PL_Wiki_InM_ikona.svg/40px-...	0.0 ms	2.4 KiB
/wikipedia/commons/thumb/f/f4/PL_Wiki_CzyWiesz_ikona.svg/...	0.0 ms	2.4 KiB
/wikipedia/commons/thumb/0/0c/Wikifunctions-logo.svg/40px...	0.0 ms	2.3 KiB
/wikipedia/commons/thumb/8/81/Wikimedia-logo.svg/40px-Wik...	0.0 ms	2.0 KiB
/wikipedia/commons/thumb/9/91/Wikiversity-logo.svg/40px-W...	0.0 ms	2.0 KiB
/wikipedia/commons/thumb/d/dd/Wikivoyage-Logo-v3-icon.svg...	0.0 ms	1.7 KiB
/wikipedia/commons/thumb/f/ff/Wikidata-logo.svg/40px-Wiki...	0.0 ms	1.3 KiB

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.

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

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
div > span > a.mw-file-description > img.mw-file-element `div > span > a.mw-file-description > img.mw-file-element`	/wikipedia/commons/thumb/3/3b/Ratusz_w_Łęczycy.jpg/500p...	51.3 KiB	32.9 KiB
Witaj w Wikipedii, wolnej encyklopedii, którą każdy może redagować. 1 692 238 a… `div#mw-content-text > div.mw-content-ltr > div#main-page > div#main-page-header`	upload.wikimedia.org/wikipedia/commons/3/3e/MP-open-book4.png	22.4 KiB	17.0 KiB
header.vector-header > div.vector-header-start > a.mw-logo > img.mw-logo-icon `header.vector-header > div.vector-header-start > a.mw-logo > img.mw-logo-icon`	pl.wikipedia.org/static/images/icons/wikipedia.png	13.1 KiB	12.7 KiB
Babur `div.floatright > span.mw-image-border > a.mw-file-description > img.mw-file-element`	upload.wikimedia.org/wikipedia/commons/thumb/5/57/Babur.jpg/120px-Babur.jpg	10.7 KiB	7.7 KiB
Królowa Elżbieta II `div.floatright > span.mw-image-border > a.mw-file-description > img.mw-file-element`	/wikipedia/commons/thumb/5/5f/Elizabeth_II_greets_NASA_GS...	7.3 KiB	4.1 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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
/w/load.php?lang=pl&modules=ext.uls.interlanguage%7Cext.v...	20.5 KiB
/w/load.php?lang=pl&modules=site.styles&only=styles&skin=...	2.9 KiB
/w/load.php?lang=pl&modules=ext.gadget.citation-access-in...	3.9 KiB

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 ▾

Source: Google web.dev / Lighthouse

Estimated savings: 90 ms 133.6 KiB

URL	Transfer Size	Est Savings
/w/load.php?lang=pl&modules=ext.centralNotice.choiceData%...	184.3 KiB	73.1 KiB
/w/load.php?lang=pl&modules=%40wikimedia%2Fcodex%2Ccodex-...	75.2 KiB	32.5 KiB
/w/load.php?lang=pl&modules=mediawiki.codex.typeaheadSear...	85.4 KiB	28.0 KiB

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 86.7 KiB

URL	Transfer Size	Est Savings
.cdx-icon{color:var(--color-base,#202122);display:inline-flex;align-items:center; … } …	31.1 KiB	29.7 KiB
.mw-editfont-monospace{font-family:monospace,monospace} …	18.8 KiB	17.5 KiB
/w/load.php?lang=pl&modules=ext.uls.interlanguage%7Cext.v...	19.7 KiB	15.3 KiB
.oo-ui-icon-edit,.mw-ui-icon-edit:before{background-image:url("data:image/svg+xml,%3Csvg xmlns=%22ht… } …	13.5 KiB	13.1 KiB
.cdx-icon{color:var(--color-base,#202122);display:inline-flex;align-items:center; … } …	12.2 KiB	11.1 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: 250 ms

URL	Time Spent
pl.wikipedia.org/	250 ms
pl.wikipedia.org/wiki/Wikipedia:Strona_g%C5%82%C3%B3wna	0.0 ms

●Max Potential First Input Delay 80 ms

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●Modern HTTP

●Optimize viewport for mobile

●Time to Interactive 1.3 s

●Minify CSS

●Minify JavaScript

●Avoids enormous network payloads Total size was 782 KiB

●User Timing marks and measures 1 user timing

●JavaScript execution time 0.3 s

●Minimizes main-thread work 1.1 s

●Avoid long main-thread tasks 2 long tasks found

●Avoid non-composited animations 2 animated elements found

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

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 10 ms

●Server Backend Latencies 50 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 0 ms

●Avoid large layout shifts 1 layout shift found

○INP breakdown

○LCP request discovery

Accessibility

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div > span > a.mw-file-description > img.mw-file-element `div > span > a.mw-file-description > img.mw-file-element`

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#main-page-column1 > div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description `div#main-page-column1 > div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description`
div#main-page-column2 > div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description `div#main-page-column2 > div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description`
div#main-page-column2 > div#main-page-good-article > figure.mw-halign-right > a.mw-file-description `div#main-page-column2 > div#main-page-good-article > figure.mw-halign-right > a.mw-file-description`
div#main-page-featured-image > div > span > a.mw-file-description `div#main-page-featured-image > div > span > a.mw-file-description`

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

○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

●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.

●`[accesskey]` values are unique

●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.

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

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

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Heading elements appear in a sequentially-descending order

●Skip links are focusable.

●Document has a main landmark.

●Deprecated ARIA roles were not used

●ARIA IDs are unique

●Uses ARIA roles only on compatible elements

●Identical links have the same purpose.

○`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

○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

○Select elements have associated label elements.

○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.

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

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Image elements do not have `[alt]` attributes that are redundant text.

○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.

100

Best Practices

General

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
/w/load.php?lang=pl&modules=ext.centralNotice.choiceData%...	/w/load.php?lang=pl&modules=ext.centralNotice.choiceData%...
/w/load.php?lang=pl&modules=mw.config.values.wbCurrentSit...	/w/load.php?lang=pl&modules=mw.config.values.wbCurrentSit...
/w/load.php?lang=pl&modules=mediawiki.codex.typeaheadSear...	/w/load.php?lang=pl&modules=mediawiki.codex.typeaheadSear...
/w/load.php?lang=pl&modules=ext.visualEditor.core.utils.p...	/w/load.php?lang=pl&modules=ext.visualEditor.core.utils.p...
/w/load.php?lang=pl&modules=ext.uls.common%2Ci18n%2Cime%2...	/w/load.php?lang=pl&modules=ext.uls.common%2Ci18n%2Cime%2...
/w/load.php?lang=pl&modules=ext.gadget.NavFrame%2CWDsearc...	/w/load.php?lang=pl&modules=ext.gadget.NavFrame%2CWDsearc...
/w/load.php?lang=pl&modules=ext.centralauth.ForeignApi%7C...	/w/load.php?lang=pl&modules=ext.centralauth.ForeignApi%7C...
/w/load.php?lang=pl&modules=%40wikimedia%2Fcodex%2Ccodex-...	/w/load.php?lang=pl&modules=%40wikimedia%2Fcodex%2Ccodex-...
/w/load.php?lang=pl&modules=startup&only=scripts&raw=1&sk...	/w/load.php?lang=pl&modules=startup&only=scripts&skin=vec...

●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 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

●Mitigate clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

○Use a strong HSTS policy

SEO

Content Best Practices

Meta descriptions may be included in search results to concisely summarize page content. Learn more about the meta description.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-didyouknow > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-featured-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element `div#main-page-good-article > figure.mw-halign-right > a.mw-file-description > img.mw-file-element`
div > span > a.mw-file-description > img.mw-file-element `div > span > a.mw-file-description > img.mw-file-element`

Format your HTML in a way that enables crawlers to better understand your app’s content.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Uncrawlable Link
... `body.skin--responsive > div.imeselector > div.imeselector-menu > a.ime-selector-more-languages`

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

●Page has successful HTTP status code

●Links have descriptive text

●robots.txt is valid

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

Results for https://pl.wikipedia.org

Site Health

How you compare

Top Priorities (5)

Fix Priority Matrix

Quick Wins

Strategic

Easy Improvements

Deprioritize

What fixing these means

Conversion Barriers

Speed (1)

Trust (1)

Content (2)

Navigation (3)

Return on Investment

Investment

Monthly returns

Regulatory risk avoided

Payback period

Estimated Remediation Cost

Cost by category

Cost by effort level

What Inaction Is Costing You

Compliance Risk

Bandwidth Waste

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Names and labels

Best Practices

General

SEO

Content Best Practices

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Names and labels

Best Practices

General

SEO

Content Best Practices

Crawling and Indexing

Keyboard Shortcuts