Accessibility
· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.FHeading HierarchyAction42 headings, 6 skip(s)FIX
- H1 A safer container ecosystem, for everyone
- H2 Near-zero CVE images, now accessible to everyone
- H4 Apache 2.0 freedom skipped
- H4 Minimal and distroless images
- H4 Up to 95% CVE reduction
- H4 Extended Lifecycle Support for long-term protection
- H4 Start secure, customize easily
- H4 1000+ images and applications
- H2 The easiest, most secure way to run MCP for your LLMs
- H4 All your MCP tools in one place skipped
- H4 Launch-ready MCP servers + clients
- H4 Security you don’t have to think about
- H2 Your full agentic stack. Just one command away.
- H4 Compose for agents skipped
- H4 Deploy anywhere
- H4 Security out of the box
- H2 The simplest way to build and run software. Anywhere.
- H4 Everything you need to build locally skipped
- H4 Security built in, confidence by default
- H4 Start from trusted content
- H2 Frictionless for devs, secure for teams, a joy for everyone
- H2 Security and speed are not a paradox anymore
- H4 Five pillars of supply chain security skipped
- H4 Run Helm charts, hardened by Docker
- H4 Join the move to a safer container ecosystem
- H2 Get access to industry-leading CVE remediation SLA
- H2 Accelerate every workflow. From apps to agents.
- H4 Build once, run anywhere skipped
- H4 Containers + MCP: better together
- H4 From client to server: the new kinds
- H2 Share AI agents just like you share containers.
- H2 Where developers build, share, and run secure software
- H2 14M+
- H2 11B+
- H2 24M+
- H2 Build better, together
- H2 Products
- H2 Features
- H2 Developers
- H2 Pricing
- H2 Company
- H2 Languages
Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.
Skipping heading levels breaks the document outline — screen-reader users lose track of section nesting.
Learn more ▾ ▴
Screen reader users navigate by jumping between headings (H1 → H2 → H3). Skipping (H1 → H3) breaks the sense of hierarchy. Use sequential levels even if you don't like the default styling — restyle with CSS instead. WCAG 1.3.1 (Info and Relationships) treats this as an A failure.
Source: WCAG 2.1 SC 1.3.1 / W3C WAI
Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.
Skipping heading levels breaks the document outline — screen-reader users lose track of section nesting.
Learn more ▾ ▴
Screen reader users navigate by jumping between headings (H1 → H2 → H3). Skipping (H1 → H3) breaks the sense of hierarchy. Use sequential levels even if you don't like the default styling — restyle with CSS instead. WCAG 1.3.1 (Info and Relationships) treats this as an A failure.
Source: WCAG 2.1 SC 1.3.1 / W3C WAI
Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.
Skipping heading levels breaks the document outline — screen-reader users lose track of section nesting.
Learn more ▾ ▴
Screen reader users navigate by jumping between headings (H1 → H2 → H3). Skipping (H1 → H3) breaks the sense of hierarchy. Use sequential levels even if you don't like the default styling — restyle with CSS instead. WCAG 1.3.1 (Info and Relationships) treats this as an A failure.
Source: WCAG 2.1 SC 1.3.1 / W3C WAI
Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.
Skipping heading levels breaks the document outline — screen-reader users lose track of section nesting.
Learn more ▾ ▴
Screen reader users navigate by jumping between headings (H1 → H2 → H3). Skipping (H1 → H3) breaks the sense of hierarchy. Use sequential levels even if you don't like the default styling — restyle with CSS instead. WCAG 1.3.1 (Info and Relationships) treats this as an A failure.
Source: WCAG 2.1 SC 1.3.1 / W3C WAI
Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.
Skipping heading levels breaks the document outline — screen-reader users lose track of section nesting.
Learn more ▾ ▴
Screen reader users navigate by jumping between headings (H1 → H2 → H3). Skipping (H1 → H3) breaks the sense of hierarchy. Use sequential levels even if you don't like the default styling — restyle with CSS instead. WCAG 1.3.1 (Info and Relationships) treats this as an A failure.
Source: WCAG 2.1 SC 1.3.1 / W3C WAI
Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.
Skipping heading levels breaks the document outline — screen-reader users lose track of section nesting.
Learn more ▾ ▴
Screen reader users navigate by jumping between headings (H1 → H2 → H3). Skipping (H1 → H3) breaks the sense of hierarchy. Use sequential levels even if you don't like the default styling — restyle with CSS instead. WCAG 1.3.1 (Info and Relationships) treats this as an A failure.
Source: WCAG 2.1 SC 1.3.1 / W3C WAI
DWeb ManifestActionNot foundFIX
No web manifest found.
DDark Mode SupportActionNo dark mode signalsFIX
Detection limited to meta tags and inline styles.
DPrint StylesheetActionNo print stylesFIX
CLink & Button QualityAction1 issue(s) across 138 links and 5 buttonsREVIEW
| Element | Text | Issue | Suggested Fix |
|---|---|---|---|
| / | (empty) | empty | Add link text or aria-label |
| /blog/nanoclaw-docker-sandboxes-agent-se… | Secure Agent Execution with Na… | img no alt | Add alt attribute to the image |
| /blog/introducing-docker-model-runner/ | Introducing Docker Model Runne… | img no alt | Add alt attribute to the image |
| /resources/reducing-every-day-complexiti… | Deliver Quickly. Build Securel… | img no alt | Add alt attribute to the image |
| /blog/docker-announces-soc-2-type-2-atte… | Docker Announces SOC 2 Type 2 … | img no alt | Add alt attribute to the image |
| https://hub.docker.com/hardened-images/c… | Get started with DHI | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/mac/main/arm6… | Download for Mac – Apple Sil… | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/mac/main/amd6… | Download for Mac – Intel Chi… | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/win/main/amd6… | Download for Windows – AMD64 | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/win/main/arm6… | Download for Windows – ARM64 | new tab | Add '(opens in new tab)' to text |
| https://docs.docker.com/desktop/linux/in… | Download for Linux | new tab | Add '(opens in new tab)' to text |
| https://hub.docker.com/mcp | Explore 250+ MCP servers | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/mac/main/arm6… | Download for Mac – Apple Sil… | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/mac/main/amd6… | Download for Mac – Intel Chi… | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/win/main/amd6… | Download for Windows – AMD64 | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/win/main/arm6… | Download for Windows – ARM64 | new tab | Add '(opens in new tab)' to text |
| https://docs.docker.com/desktop/linux/in… | Download for Linux | new tab | Add '(opens in new tab)' to text |
| https://youtu.be/KJLVyNcB-rQ | Watch video | new tab | Add '(opens in new tab)' to text |
| https://hub.docker.com/hardened-images/c… | Explore Helm Charts in Docker … | new tab | Add '(opens in new tab)' to text |
| https://docs.docker.com/dhi/core-concept… | Learn core concepts of Docker … | new tab | Add '(opens in new tab)' to text |
| https://hub.docker.com/hardened-images/s… | Sign in to try DHI Enterprise | new tab | Add '(opens in new tab)' to text |
| https://docs.docker.com/desktop/ | Start building with Docker Des… | new tab | Add '(opens in new tab)' to text |
| https://hub.docker.com/ | Go to Docker Hub | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/mac/main/arm6… | Download for Mac – Apple Sil… | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/mac/main/amd6… | Download for Mac – Intel Chi… | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/win/main/amd6… | Download for Windows – AMD64 | new tab | Add '(opens in new tab)' to text |
| https://desktop.docker.com/win/main/arm6… | Download for Windows – ARM64 | new tab | Add '(opens in new tab)' to text |
| https://docs.docker.com/desktop/linux/in… | Download for Linux | new tab | Add '(opens in new tab)' to text |
| http://twitter.com/docker | .cls-1{fill:var(--iconColor, #… | new tab | Add '(opens in new tab)' to text |
| https://www.linkedin.com/company/docker | .cls-1{fill:var(--iconColor, #… | new tab | Add '(opens in new tab)' to text |
| https://www.instagram.com/dockerinc/ | .cls-1{fill:var(--iconColor, #… | new tab | Add '(opens in new tab)' to text |
| http://www.youtube.com/user/dockerrun | .cls-1{fill:var(--iconColor, #… | new tab | Add '(opens in new tab)' to text |
| https://www.facebook.com/docker.run | .cls-1{fill:var(--iconColor, v… | new tab | Add '(opens in new tab)' to text |
| /blog/feed | .cls-1{fill:var(--iconColor, #… | new tab | Add '(opens in new tab)' to text |
Links without text are announced as raw URLs by screen readers.
/
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
Image-only links need alt text on the image (or aria-label on the link) so screen readers can announce them.
a#dkr_head_latest_release; a#dkr_head_card_1; a#dkr_head_card_2; a[href="/blog/docker-announces-soc-2-type-2-attestation-iso-27001-certification/"]
Image-only links with no alt are unidentifiable to screen-reader users — link's destination is invisible.
Source: WCAG 2.1 SC 2.4.4
Add '(opens in new tab)' to link text or aria-label.
https://hub.docker.com/hardened-images/catalog; https://desktop.docker.com/mac/main/arm64/Docker.dmg?utm_source=docker&utm_me…; https://desktop.docker.com/mac/main/amd64/Docker.dmg?utm_source=docker&utm_me…; https://desktop.docker.com/win/main/amd64/Docker%20Desktop%20Installer.exe?ut…; https://desktop.docker.com/win/main/arm64/Docker%20Desktop%20Installer.exe?ut…; https://docs.docker.com/desktop/linux/install/; https://hub.docker.com/mcp; https://desktop.docker.com/mac/main/arm64/Docker.dmg?utm_source=docker&utm_me…; https://desktop.docker.com/mac/main/amd64/Docker.dmg?utm_source=docker&utm_me…; https://desktop.docker.com/win/main/amd64/Docker%20Desktop%20Installer.exe?ut… (+19 more)
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
C404 Error PageActionHTTP 404, custom pageREVIEW
BFavicon & Branding4 icon(s) detectedREVIEW
BLighthouse Accessibility AuditsScore 88/100 — 4 failing, 25 passedREVIEW
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
MCP div.wp-block-ponyo-boone > div.wp-block-ponyo-tatiana > a.wp-block-ponyo-tab > div.tab-text |
Agents div.wp-block-ponyo-boone > div.wp-block-ponyo-tatiana > a.wp-block-ponyo-tab > div.tab-text |
Containers div.wp-block-ponyo-boone > div.wp-block-ponyo-tatiana > a.wp-block-ponyo-tab > div.tab-text |
These are opportunities to improve the legibility of your content.
Navigation
Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Apache 2.0 freedom div.wp-block-ponyo-erika > div.container > div.copy-container > h4.wp-block-ponyo-heading |
Five pillars of supply chain security div.wp-block-ponyo-erika > div.container > div.copy-container > h4.wp-block-ponyo-heading |
Build once, run anywhere div.wp-block-ponyo-erika > div.container > div.copy-container > h4.wp-block-ponyo-heading |
These are opportunities to improve keyboard navigation in your application.
Names and labels
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.wp-block-group > header.site-header > div.wp-block-group > a.logo div.wp-block-group > header.site-header > div.wp-block-group > a.logo |
div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a |
div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a |
div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a |
div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a |
div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a |
div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a div.wp-block-ponyo-newsletter-social > ul.social-wrap > li > a |
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.
Tables and lists
Screen readers have a specific way of announcing lists. Ensuring proper list structure aids screen reader output. Learn more about proper list structure.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Products
Products Overview
Docker Desktop
Docker Hub
Docker Scout
Docker Build … div.wp-block-ponyo-freddie > div.menu-container > div.wp-block-ponyo-faith > ul |
Features
Command Line Interface
IDE Extensions
Container Runtime
Docker Extensi… div.wp-block-ponyo-freddie > div.menu-container > div.wp-block-ponyo-faith > ul |
Developers
Documentation
Getting Started
Trainings
Extensions SDK
Community
Ope… div.wp-block-ponyo-freddie > div.menu-container > div.wp-block-ponyo-faith > ul |
Pricing
Personal
Pro
Team
Business
Premium Support and TAM
Pricing FAQ
Contact … div.wp-block-ponyo-freddie > div.menu-container > div.wp-block-ponyo-faith > ul |
Company
About Us
What is a Container
Blog
Why Docker
Trust
Customer Success
Par… div.wp-block-ponyo-freddie > div.menu-container > div.wp-block-ponyo-faith > ul |
Languages
English
日本語 div.wp-block-ponyo-freddie > div.menu-container > div.wp-block-ponyo-faith > ul |
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
A+Landmark Structure4 landmarksPASS
A+Alt Text QualityAll 27 images OKPASS
AForm Accessibility1 of 2 controls have issuesPASS
| Control | Type | Label | Method |
|---|---|---|---|
| #wp-block-search__input-1 | search | Search | for/id |
| #g-recaptcha-response-100000 | textarea | (none) | none |
Form controls need a <label>, aria-label, or aria-labelledby for screen readers.
<textarea name="g-recaptcha-response" id="g-recaptcha-response-100000">
Form controls without labels — assistive tech announces 'edit text' with no context; users can't complete forms.
Source: WCAG 2.1 SC 3.3.2
A+Color Contrast (Screenshot)20 text elements analyzed, 0 fail WCAG AAPASS
Analyzes text contrast against the actual rendered page, including background images, gradients, and overlays that CSS-based tools cannot detect.
Show all checked elements (20)
| Element | Ratio | Required | FG | BG | Result |
|---|---|---|---|---|---|
| h1 A safer container ec… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Near-zero CVE images… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 The easiest, most se… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Your full agentic st… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 The simplest way to … | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Frictionless for dev… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Security and speed a… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Get access to indust… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Accelerate every wor… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Share AI agents just… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Where developers bui… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 14M+ | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 11B+ | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 24M+ | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Build better, togeth… | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Products | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Features | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Developers | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Pricing | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | Pass |
| h2 Company | 13.39:1 | 3.0:1 | #000000 | #C8CFDA | 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.