Skip to content
https://slack.com

Accessibility

· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.
SCORE
65
GRADE
D
FIX
5
REVIEW
2
PASS
6
INFO
0
Checks
13
6 PASS 2 REVIEW 5 FIX
F
Favicon & Branding
Action
2 icon(s) detected
FIX
2 icon(s) detected
Info::
favicon.ico present at site root
Info::
HTML icon links detected
Info::
No apple-touch-icon detected
iOS devices use this when users add your site to their home screen. Add <link rel='apple-touch-icon' sizes='180x180' href='/apple-touch-icon.png'>.
✓ favicon.ico Present
✓ PNG Icons Present
✗ Apple Touch Missing
✗ SVG Favicon Missing
✗ Manifest Icons Missing
✗ Multiple Sizes Missing
D
Web Manifest
Action
Not found
FIX
Not found
Info::
No web manifest found
No manifest at standard paths (/manifest.json, /site.webmanifest). A manifest is optional but enables PWA features like home screen installation and standalone display.

No web manifest found.

D
Dark Mode Support
Action
No dark mode signals
FIX
No dark mode signals
Info::
No dark mode signals detected
Consider adding CSS with @media (prefers-color-scheme: dark) and <meta name='color-scheme' content='light dark'>.
Info::
Detection limited to meta tags and inline styles
External CSS files may contain prefers-color-scheme rules not visible to this scan.
Dark ModeNo Dark Mode Detected
color-scheme meta Not set ✗Dark theme-color Not set ✗CSS indicators Not detected ✗

Detection limited to meta tags and inline styles.

D
Print Stylesheet
Action
No print styles
FIX
No print styles
Info::
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 ✗
F
Navigation UX
Action
1 navigation pattern(s)
FIX
1 navigation pattern(s)
Info::
Skip navigation link detected
Info::
6 navigation landmark(s) detected
Info::
Hamburger menu detected (responsive design)
Breadcrumbs
Search
Skip Link Skip link detected
Labeled Navigation 6 <nav> element(s)
Back to Top
Hamburger Menu
Sticky Navigation Cannot reliably detect (CSS-based)
3 of 6 testable patterns navigation patterns detected. Strong navigation UX with multiple discovery paths.
B
404 Error Page
HTTP 404, custom page
REVIEW
HTTP 404, custom page
Info::
Correct 404 status code returned
Got: HTTP 404
Info::
Custom styled 404 page
Info::
Navigation links present on 404 page
Info::
Homepage link present on 404 page
404 Page Quality ✓ Custom 404 Page
Status Code HTTP 404 ✓Page Title There's been a glitch… | Slack ✓Custom Styling ✓Navigation ✓Homepage Link ✓Search Form ✗
A
Landmark Structure
27 landmarks
PASS
27 landmarks
Info::
<main> landmark present
Info::
6 <nav> landmark(s) found
Warning::
3 of 6 <nav> elements are unlabeled
Multiple navigations need aria-label to distinguish them for screen readers.
Info::
Skip navigation link present
Page Structure — as a screen reader sees it
BANNER header NAV "Primary Navigation" MAIN CONTENTINFO footer

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

A+
Heading Hierarchy
33 headings
PASS
33 headings
Info::
Single H1 present
  • H1 All your people and AI agents working together.
  • H2 Reimagine what’s possible with AI and agents.
  • H2 Knowledge
  • H2 People
  • H2 Process
  • H2 Platform
  • H2 The most innovative companies run their business in Slack.
  • H3 Slackbot helps MrBeast create viral videos.
  • H3 Slack helps Box bring agents to every employee
  • H3 Caraway Brings All The Right Ingredients Together In Slack
  • H3 Slack helps Rivian do business in the fast lane
  • H3 Slackbot helps MrBeast create viral videos.
  • H3 Slack helps Box bring agents to every employee
  • H3 Caraway Brings All The Right Ingredients Together In Slack
  • H3 Slack helps Rivian do business in the fast lane
  • H2 We’re in the business of growing businesses.
  • H2 Millions of people love to work in Slack.
  • H2 Your Slack deep dive starts here.
  • H3 AI Agents are the Catalyst for a Limitless Workforce
  • H3 Meet the new Slack. Where AI works.
  • H3 Ready for the future of AI in Slack?
  • H3 10 Ways to Replace Ineffective Meetings with Slack
  • H3 AI Agents are the Catalyst for a Limitless Workforce
  • H3 Meet the new Slack. Where AI works.
  • H3 Ready for the future of AI in Slack?
  • H3 10 Ways to Replace Ineffective Meetings with Slack
  • H3 See all you can accomplish in Slack.
  • H2 Privacy Preference Center
  • H3 Manage Consent Preferences
  • H4 Required Cookies
  • H4 Functional Cookies
  • H4 Advertising Cookies
  • H3 Cookie List
A+
Alt Text Quality
All 82 images OK
PASS
All 82 images OK
Info::
26 decorative image(s) correctly marked
Info::
56 image(s) with good alt text
82 images 56 good alt text 26 decorative
All images have appropriate alt text.
A+
Form Accessibility
All 7 controls labeled
PASS
All 7 controls labeled
Info::
7 control(s) properly labeled
7 controls
7 labeled
0 placeholder only
0 unlabeled
ControlTypeLabelMethod
#ot-group-id-3checkboxFunctional Cookiesfor/id
#ot-group-id-4checkboxAdvertising Cookiesfor/id
#vendor-search-handlertextCookie list searcharia-label
#chkbox-idcheckboxcheckbox labelfor/id
#select-all-hosts-groups-handlercheckboxcheckbox labelfor/id
#select-all-vendor-groups-handlercheckboxcheckbox labelfor/id
#select-all-vendor-leg-handlercheckboxcheckbox labelfor/id
A+
Color Contrast (Screenshot)
20 text elements analyzed, 0 fail WCAG AA
PASS

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

20 pass
Show all checked elements (20)
ElementRatioRequiredFGBGResult
h1 All your people and …20.90:13.0:1
#000000
#FFFFF7
Pass
h2 Reimagine what’s p…20.90:13.0:1
#000000
#FFFFF7
Pass
h2 Knowledge20.90:13.0:1
#000000
#FFFFF7
Pass
h2 People20.90:13.0:1
#000000
#FFFFF7
Pass
h2 Process20.90:13.0:1
#000000
#FFFFF7
Pass
h2 Platform20.90:13.0:1
#000000
#FFFFF7
Pass
h2 The most innovative …20.90:13.0:1
#000000
#FFFFF7
Pass
h2 We’re in the busin…20.90:13.0:1
#000000
#FFFFF7
Pass
h2 Millions of people l…20.90:13.0:1
#000000
#FFFFF7
Pass
h2 Your Slack deep dive…20.90:13.0:1
#000000
#FFFFF7
Pass
h2 Privacy Preference C…20.90:13.0:1
#000000
#FFFFF7
Pass
h3 Slackbot helps MrBea…20.90:13.0:1
#000000
#FFFFF7
Pass
h3 Slack helps Box brin…20.90:13.0:1
#000000
#FFFFF7
Pass
h3 Caraway Brings All T…20.90:13.0:1
#000000
#FFFFF7
Pass
h3 Slack helps Rivian d…20.90:13.0:1
#000000
#FFFFF7
Pass
h3 Slackbot helps MrBea…20.90:13.0:1
#000000
#FFFFF7
Pass
h3 Slack helps Box brin…20.90:13.0:1
#000000
#FFFFF7
Pass
h3 Caraway Brings All T…20.90:13.0:1
#000000
#FFFFF7
Pass
h3 Slack helps Rivian d…20.90:13.0:1
#000000
#FFFFF7
Pass
h3 AI Agents are the Ca…20.90:13.0:1
#000000
#FFFFF7
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+
Lighthouse Accessibility Audits
Score 95/100 — 3 failing, 28 passed
PASS
95

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

Including a skip link can help users skip to the main content to save time. Learn more about skip links.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
SKIP TO MAIN CONTENT body.homepage-slim-banner-enabled > a.c-button

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.

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
Download Slack footer.c-nav > div.c-nav--expanded-footer__submenu > div.c-nav__legal-links > a.download-slack-link

These items highlight common accessibility best practices.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Slackbot helps MrBeast create viral videos. div.swiper-container > div#swiper-wrapper-a78bc542c0ec1cb7 > div.swiper-slide > a.v--top
Slack helps Box bring agents to every employee div.swiper-container > div#swiper-wrapper-a78bc542c0ec1cb7 > div.swiper-slide > a.v--top
○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●`button`, `link`, and `menuitem` elements have accessible names
●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
●`<frame>` or `<iframe>` elements have a title
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●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
●ARIA IDs are unique
●`<video>` elements contain a `<track>` element with `[kind="captions"]`
●Identical links have the same purpose.
○`[accesskey]` values are unique
○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
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○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.

Send Feedback