Accessibility

· 24 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Checks

13 PASS 8 REVIEW 3 FIX

Dark Mode Support

Action

Theme color only

FIX

Theme color only

Theme-color present but no dark variant

A theme-color is set but no dark-specific variant was found. The browser toolbar may not adapt for dark mode users.

Got: #264d39

No dark mode signals detected

Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.

Detection limited to meta tags and inline styles

External CSS files may contain prefers-color-scheme rules not visible to this scan.

Dark ModePartial Dark Mode

color-scheme meta Not set ✗Dark theme-color Not set ✗CSS indicators Not detected ✗

Detection limited to meta tags and inline styles.

Print Stylesheet

Action

No print styles

FIX

No print styles

No print-specific styles detected

When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

Print Stylesheet No Print Styles

Print stylesheet Not found ✗Inline @media print Not detected ✗

Navigation UX

Action

1 navigation pattern(s)

FIX

1 navigation pattern(s)

Search functionality detected

Got: role-search

7 navigation landmark(s) detected

Hamburger menu detected (responsive design)

Breadcrumbs

Search role='search' landmark

Skip Link

Labeled Navigation 7 <nav> element(s)

Hamburger Menu

Sticky Navigation Cannot reliably detect (CSS-based)

3 of 6 testable patterns navigation patterns detected. Strong navigation UX with multiple discovery paths.

Landmark Structure

11 landmarks

REVIEW

11 landmarks

<main> landmark present

7 <nav> landmark(s) found

6 of 7 <nav> elements are unlabeled

Multiple navigations need aria-label to distinguish them for screen readers.

Skip navigation link is missing (WCAG 2.4.1)

Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

Search landmark present

Page Structure — as a screen reader sees it

Multiple navigations need aria-label to distinguish them for screen readers.

Why this matters

Some <nav> elements lack aria-label — screen-reader users hear 'navigation' multiple times with no way to distinguish them.

Learn more ▾

When a page has multiple <nav> regions (primary, footer, breadcrumb), each needs aria-label or aria-labelledby. AT users navigate by landmark; identical 'navigation' announcements force them to enter each one to discover purpose.

Source: WAI-ARIA Authoring Practices

Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

Why this matters

Without a skip-nav link, keyboard users tab through every nav item before reaching content — every page, every visit.

Learn more ▾

WCAG 2.4.1 (Bypass Blocks) requires a mechanism to skip past repeated content. The standard implementation is a 'Skip to main content' link that's the first focusable element, visually hidden until focused. Three lines of HTML + four of CSS.

Source: WCAG 2.1 SC 2.4.1

Heading Hierarchy

36 headings

REVIEW

36 headings

No H1 heading found

Every page should have one H1 that describes the page content.

H3 Za posledních 24 hodin lidé na Knihobotu vydělali přibližně 1 100 000 Kč
H2 Sarah J. Maas propojuje svoje světy. Máš přečteno?
H3 Skleněný trůn
H3 Dvůr trnů a růží
H3 Dědička ohně
H3 Dvůr mlhy a hněvu
H3 Dvůr křídel a zmaru
H3 Půlměsíční město. Rod země a krve
H3 Království popela
H3 Půlnoční koruna
H2 Hned bude pryč
H2 Zpátky do školy
H2 Povinná četba a klasika
H2 Cozy crime pod deku
H2 Vaření a pečení na podzim
H2 Thrillery na dlouhé večery
H2 Letí na BookToku
H2 Hygge: útulno doma
H2 Romantické večery
H2 Strašidelno se blíží
H2 Komiks & manga
H2 Nové kapitoly, nové cíle
H2 Do aktovky: učebnice
H2 První čtení pro prvňáčky
H2 Současná česká próza
H2 Severská detektivka
H2 Jak funguje Watchdog
H3 Žádná kniha už ti neunikne
H2 Nejčastěji hlídané
H2 Jedinečné kousky
H2 Nakupuj a prodávej knihy na jednom místě
H3 Knihy
H3 Prodej
H3 Nákup
H3 Knihobot
H3 Můžeme pomoci?

Every page should have one H1 that describes the page content.

Why this matters

No H1 means screen-reader users can't identify the page's primary topic, and Google's content-extraction degrades.

Learn more ▾

The H1 is the document title for assistive tech and a strong signal to search engines about page topic. Pages without one force screen readers to fall back to the <title> attribute or page chrome. Add a single H1 that names the page's primary subject.

Source: WCAG 2.4.6 / Google Search Central

Link & Button Quality

Action

2 issue(s) across 300 links and 16 buttons

REVIEW

2 issue(s) across 300 links and 16 buttons

1 link(s) with no accessible text

Links without text are announced as raw URLs by screen readers.

Got: https://knihobot.cz/

6 link(s) open in new tab without warning

Add '(opens in new tab)' to link text or aria-label.

Got: https://wa.me/420228229364; https://www.facebook.com/knihobot.cz/; https://www.instagram.com/knihobot.cz/; https://www.linkedin.com/company/knihobot/; https://x.com/knihobot/; https://www.youtube.com/channel/UCS0dd0fBZSIYWPsai4ek1SQ/

1 button(s) with no accessible text

Icon-only buttons need an aria-label so screen readers can announce them.

Got: button.CarouselButton_styles_button__Xq0Tr (#1255 on page)

293 link(s) with descriptive text

300 links

1 empty

0 generic text

6 new tab

1 empty buttons

Element	Text	Issue	Suggested Fix
https://knihobot.cz/	(empty)	empty	Add link text or aria-label
https://wa.me/420228229364	WhatsApp	new tab	Add '(opens in new tab)' to text
https://www.facebook.com/knihobot.cz/	facebook	new tab	Add '(opens in new tab)' to text
https://www.instagram.com/knihobot.cz/	instagram	new tab	Add '(opens in new tab)' to text
https://www.linkedin.com/company/knihobo…	linkedin	new tab	Add '(opens in new tab)' to text
https://x.com/knihobot/	x	new tab	Add '(opens in new tab)' to text
https://www.youtube.com/channel/UCS0dd0f…	youtube	new tab	Add '(opens in new tab)' to text
<button>	(empty)	empty	Add button text or aria-label

308 links and buttons have descriptive text

Links without text are announced as raw URLs by screen readers.

https://knihobot.cz/

Why this matters

Links with no accessible text (empty <a></a>, image-only no alt, icon-only no aria-label) are unidentifiable to screen readers.

Source: WCAG 2.1 SC 2.4.4

Add '(opens in new tab)' to link text or aria-label.

https://wa.me/420228229364; https://www.facebook.com/knihobot.cz/; https://www.instagram.com/knihobot.cz/; https://www.linkedin.com/company/knihobot/; https://x.com/knihobot/; https://www.youtube.com/channel/UCS0dd0fBZSIYWPsai4ek1SQ/

Why this matters

Links with target="_blank" without rel="noopener" leak the originating page's window context — security and UX issue.

Learn more ▾

Without rel="noopener", the new tab can navigate the original tab via window.opener (tab-nabbing attack). Modern browsers default to noopener for target=_blank but only since recent versions. Always set rel="noopener noreferrer" explicitly.

Source: MDN target / OWASP

Icon-only buttons need an aria-label so screen readers can announce them.

button.CarouselButton_styles_button__Xq0Tr (#1255 on page)

Why this matters

Buttons with no accessible text (icon-only, no aria-label) can't be activated by voice control or understood by screen readers.

Source: WCAG 2.1 SC 4.1.2

Tap Target Adequacy

Action

4 tap target(s) too small or too close together

REVIEW

4 tap target(s) too small or too close together

4 tap target(s) too small or too close to neighbors

WCAG 2.5.5 (Level AAA) requires interactive targets to be at least 44x44 CSS pixels; WCAG 2.5.8 (Level AA, added in 2.2) requires 24x24 minimum. Failing targets cause mis-taps for users with motor impairments, large fingers, or shaky hands -- and are a major bounce-rate driver on mobile commerce flows. Lighthouse measures rendered rects + adjacent-element spacing; the failing list is in the Lighthouse 'tap-targets' audit detail panel.

404 Error Page

Action

HTTP 404, custom page

REVIEW

HTTP 404, custom page

Correct 404 status code returned

Got: HTTP 404

Custom styled 404 page

Homepage link present on 404 page

404 Page Quality ✓ Custom 404 Page

Status Code HTTP 404 ✓Page Title Knihobot antikvariát online | vracíme knihy do oběhu ✓Custom Styling ✓Navigation ✗Homepage Link ✓Search Form ✗

Favicon & Branding

17 icon(s) detected

REVIEW

17 icon(s) detected

favicon.ico present at site root

HTML icon links detected

Apple touch icon present

Multiple icon sizes detected

✓ favicon.ico Present

✓ PNG Icons Present

✓ Apple Touch Present

✗ SVG Favicon Missing

✓ Manifest Icons Present

✓ Multiple Sizes Present

Web Manifest

Action

Valid manifest

REVIEW

Valid manifest

No name or short_name

Add a name field to identify the app.

192x192 icon present

512x512 icon present

Display mode: standalone

PWA Install Criteria Not Installable

Name ✗192×192 icon ✓512×512 icon ✓Start URL ✗Display Mode standalone ✓

Display Mode standalone Theme Color #264D39 Background Color #ffffff Icons 2 icon(s)

Color Contrast (Screenshot)

Action

20 text elements analyzed, 3 fail WCAG AA

REVIEW

Analyzes text contrast against the actual rendered page, including background images, gradients, and overlays that CSS-based tools cannot detect.

17 pass 3 fail WCAG AA 1 pass AA only

title Knihobot antikvariát online | vracíme …

2.20:1

#000000

#264D39

needs 4.5:1 (normal text)

16px · top of page (header area)

label Hledej knihu, autora, ISBN nebo kategori…

1.35:1

#000000

#17271F

needs 4.5:1 (normal text)

16px · above the fold

button Beletrie

2.55:1

#000000

#44524A

needs 4.5:1 (normal text)

16px · above the fold · over background image/gradient

1 contrast failures on background images/gradients

These failures are invisible to CSS-based accessibility tools like Lighthouse. The text may be fine on a solid background, but fails when rendered over an image or gradient.

Show all checked elements (20)

Element	Ratio	Required	FG	BG	Result
h2 Hned bude pryč	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Nejčastěji hlídan…	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h2 Nakupuj a prodávej …	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h3 Za posledních 24 ho…	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h3 Žádná kniha už t…	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h3 Knihy	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h3 Prodej	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h3 Nákup	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h3 Knihobot	21.00:1	3.0:1	#000000	#FFFFFF	Pass
h3 Můžeme pomoci?	21.00:1	3.0:1	#000000	#FFFFFF	Pass
title Knihobot antikvariá…	2.20:1	4.5:1	#000000	#264D39	Fail
a Objev Knihobot Klub …	21.00:1	4.5:1	#000000	#FFFFFF	Pass
span Knihobot Klub	21.00:1	4.5:1	#000000	#FFFFFF	Pass
span Pobočky	21.00:1	4.5:1	#000000	#FFFFFF	Pass
span Kariéra	21.00:1	4.5:1	#000000	#FFFFFF	Pass
span Kontakt	8.38:1	4.5:1	#000000	#9CA6A0	Pass
label Hledej knihu, autora…	1.35:1	4.5:1	#000000	#17271F	Fail
span Prodat knihy	5.68:1	4.5:1	#000000	#7E8782	Pass
button Beletrie	2.55:1	4.5:1	#000000	#44524A	Fail
span Detektivky & Thrille…	7.09:1	4.5:1	#000000	#A09761	Pass

Methodology: The top 20 text elements by font size were checked. Background color was sampled from the desktop screenshot using a 5-point pattern. WCAG 2.1 AA requires 4.5:1 for normal text and 3:1 for large text.

A+

Heading Text Quality

All 36 heading(s) have substantive, well-formed text

PASS

All 36 heading(s) have substantive, well-formed text

Heading text quality is clean -- no placeholder, length, or styling issues

A+

Alt Text Quality

1 of 24 images have issues

PASS

1 of 24 images have issues

1 image(s) with generic alt text

3 decorative image(s) correctly marked

20 image(s) with good alt text

24 images 20 good alt text 3 decorative 1 generic

Issue	Count
generic	1 image(s)

A+

Form Accessibility

All 1 controls labeled

PASS

All 1 controls labeled

1 control(s) properly labeled

1 controls

1 labeled

0 placeholder only

0 unlabeled

Control	Type	Label	Method
#:Rd5bj6:	text	Hledej knihu, autora, ISBN nebo kategorii...	for/id

A+

Form Input Types

1 form control(s) checked, no type mismatches

PASS

1 form control(s) checked, no type mismatches

No input-type mismatches detected

A+

Form Input Quality

1 form control(s) checked, no input-semantic issues

PASS

1 form control(s) checked, no input-semantic issues

All form input semantics look correct

A+

Mobile Keyboard & Autofill

No autofill-eligible form controls

PASS

No autofill-eligible form controls

No autofill-eligible form controls (no name/email/tel/address fields)

A+

Document Language

Lang attribute set to "cs"

PASS

Lang attribute set to "cs"

<html lang="cs"> is set and valid

Got: cs

A+

Tabindex Anti-Patterns

5 explicit tabindex attribute(s) checked, no anti-patterns

PASS

5 explicit tabindex attribute(s) checked, no anti-patterns

No tabindex anti-patterns detected

A+

Iframe Accessibility

No iframes on this page

PASS

No iframes on this page

A+

Mobile-Readable Font Sizes

All 194 visible text node(s) render at >= 12 CSS pixels

PASS

All 194 visible text node(s) render at >= 12 CSS pixels

All text uses legible mobile font sizes (>= 12 CSS px)

A+

PWA Depth

1 PWA signal(s) surfaced

PASS

1 PWA signal(s) surfaced

Manifest has no maskable icon

Android 12+ Adaptive Icons crop non-maskable icons to a circle or squircle -- frequently hiding important parts of the logo. Add at least one icon entry with `"purpose": "maskable"` (or `"any maskable"`) and a maskable-aware design (16% safe-zone padding around the inner mark).

A+

Mobile UX Depth

1 mobile-depth signal(s) detected

PASS

1 mobile-depth signal(s) detected

Browser-chrome `theme-color` meta tag present

The page sets `<meta name="theme-color" content="...">`, which Android Chrome uses to tint the status bar and iOS Safari uses for the toolbar background. Brand polish that costs nothing and Just Works.

Lighthouse Accessibility Audits

Score 93/100 — 2 failing, 26 passed

PASS

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
div.HeaderSearch_styles_root__P3kpS > form.HeaderSearchForm_styles_root__vb_ss > div.HeaderSearchFormInput_styles_root__r7sFw > input#:Rd5bj6: `div.HeaderSearch_styles_root__P3kpS > form.HeaderSearchForm_styles_root__vb_ss > div.HeaderSearchFormInput_styles_root__r7sFw > input#:Rd5bj6:`
Sarah J. Maas `div.ProductCardCarouselItem_styles_root__9mII6 > article.ProductCard_styles_root__qkYLe > div.ProductCard_styles_body__w8HDH > a.ProductCardBodyAuthors_styles_root__BRhTT`
Skladem 6 ks `article.ProductCard_styles_root__qkYLe > div.ProductCard_styles_body__w8HDH > div.ProductCardBody_styles_stateAndFlags__dWCP4 > div.ProductCardBodyState_styles_root__bS8_k`
Sarah J. Maas `div.ProductCardCarouselItem_styles_root__9mII6 > article.ProductCard_styles_root__qkYLe > div.ProductCard_styles_body__w8HDH > a.ProductCardBodyAuthors_styles_root__BRhTT`
Skladem 9 ks `article.ProductCard_styles_root__qkYLe > div.ProductCard_styles_body__w8HDH > div.ProductCardBody_styles_stateAndFlags__dWCP4 > div.ProductCardBodyState_styles_root__bS8_k`
Žádná kniha už ti neunikne `div.CMSPromo_styles_root__t11DG > div.CMSPromo_styles_contentWrapper__yF7Wi > div.CMSPromo_styles_wrapper__FYgej > h3.CMSPromo_styles_label__TOxUs`
Za posledních 24 h jsme přidali 36 354 knih. To je na výšku jako 11,4 Petřínský… `div.FooterHead_styles_root__okxbN > div > div.FooterHead_styles_addedBooksWrapper__klXa_ > p.Typography_styles_typography__xNmkQ`
36 354 `div > div.FooterHead_styles_addedBooksWrapper__klXa_ > p.Typography_styles_typography__xNmkQ > span.Typography_styles_typography__xNmkQ`
11,4 `div > div.FooterHead_styles_addedBooksWrapper__klXa_ > p.Typography_styles_typography__xNmkQ > span.Typography_styles_typography__xNmkQ`
Bezpečnou platbu zajistí `div.ResponsiveContainer_styles_root__iai5v > div.FooterServices_styles_root__dc0Gx > div.FooterServicesPayment_styles_root__bC98k > p.Typography_styles_typography__xNmkQ`
O rychlé dodání se postará `div.ResponsiveContainer_styles_root__iai5v > div.FooterServices_styles_root__dc0Gx > div.FooterServicesCarriers_styles_root__8HbVw > p.Typography_styles_typography__xNmkQ`
Obchodní podmínky pro nákup `nav > ul.FooterServicesLinksLegal_styles_list__F2tTw > li > a.FooterServicesLinksLegal_styles_link__V73xz`
Obchodní podmínky pro obstarání prodeje `nav > ul.FooterServicesLinksLegal_styles_list__F2tTw > li > a.FooterServicesLinksLegal_styles_link__V73xz`
Ochrana osobních údajů `nav > ul.FooterServicesLinksLegal_styles_list__F2tTw > li > a.FooterServicesLinksLegal_styles_link__V73xz`
Knihy bez cenzury `nav > ul.FooterServicesLinksLegal_styles_list__F2tTw > li > a.FooterServicesLinksLegal_styles_link__V73xz`
SK `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`
AT `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`
DE `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`
COM `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`
ES `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`
IT `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`
NL `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`
FR `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`
BE `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`
PL `nav.FooterServicesLinksSite_styles_root__rDYDH > ul.FooterServicesLinksSite_styles_list__1xDSH > li > a.FooterServicesLinksSite_styles_link__hoVTk`

These are opportunities to improve the legibility of your content.

Best practices

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Pouze 449 Kč `div.ProductCardBody_styles_priceRowWithDeal__ZAFjZ > div.ProductCardBodyDeal_styles_root__7n2UI > p.Typography_styles_typography__xNmkQ > a.ProductCardLink_styles_root__RGJS5`
Pro členy Klubu `div.ProductCardBody_styles_priceRowWithDeal__ZAFjZ > div.ProductCardBodyDeal_styles_root__7n2UI > p.Typography_styles_typography__xNmkQ > a`
Pouze 323 Kč `div.ProductCardBody_styles_priceRowWithDeal__ZAFjZ > div.ProductCardBodyDeal_styles_root__7n2UI > p.Typography_styles_typography__xNmkQ > a.ProductCardLink_styles_root__RGJS5`
Pro členy Klubu `div.ProductCardBody_styles_priceRowWithDeal__ZAFjZ > div.ProductCardBodyDeal_styles_root__7n2UI > p.Typography_styles_typography__xNmkQ > a`

These items highlight common accessibility best practices.

○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 are distinguishable without relying on color.

●Links have a discernible name

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

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

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

●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

○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.

○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.

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.