Accessibility
· 24 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.FAlt Text QualityAction8 of 11 images have issuesFIX
| Issue | Count |
|---|---|
| missing | 8 image(s) |
Images without alt text are invisible to screen readers.
Each image without alt text is a WCAG 1.1.1 failure — invisible to screen-reader users, lost from Google Image Search.
Learn more ▾ ▴
WCAG 2.1 Level A requires text alternatives for non-decorative images. Empty alt='' is fine for decorative; meaningful images need descriptive text. Common fixes: CMS audit + bulk add, build-time linter (alt-text-required ESLint rule), CI gate on Lighthouse a11y score.
Source: WCAG 2.1 SC 1.1.1 / WebAIM Million Report
An image inside a link with no alt creates an empty link.
Image-only links with no alt create empty links — screen-reader users hear 'link' with no destination context.
Learn more ▾ ▴
An <a><img></a> with no img alt is the worst-case for accessibility: AT announces the link but can't describe where it goes. Either add alt to the image OR add aria-label to the link.
Source: WCAG 2.1 SC 2.4.4
FLink & Button QualityAction15 issue(s) across 161 links and 26 buttonsFIX
| Element | Text | Issue | Suggested Fix |
|---|---|---|---|
| https://docs.github.com | Documentation | new tab | Add '(opens in new tab)' to text |
| https://github.blog | Blog | new tab | Add '(opens in new tab)' to text |
| https://github.blog/changelog | Changelog | new tab | Add '(opens in new tab)' to text |
| https://skills.github.com | GitHub Skills | new tab | Add '(opens in new tab)' to text |
| https://docs.github.com | Documentation | new tab | Add '(opens in new tab)' to text |
| https://support.github.com | Customer support | new tab | Add '(opens in new tab)' to text |
| https://securitylab.github.com | Security Lab | new tab | Add '(opens in new tab)' to text |
| https://maintainers.github.com | Maintainer Community | new tab | Add '(opens in new tab)' to text |
| https://stars.github.com | GitHub Stars | new tab | Add '(opens in new tab)' to text |
| https://archiveprogram.github.com | Archive Program | new tab | Add '(opens in new tab)' to text |
| /007revad/Synology_Docker_Export | (empty) | empty | Add link text or aria-label |
| /007revad/Synology_Docker_Export/blob/ma… | (empty) | empty | Add link text or aria-label |
| https://github.com/007revad/Synology_Doc… | (empty) | empty | Add link text or aria-label |
| https://camo.githubusercontent.com/97a56… | Badge | new tab | Add '(opens in new tab)' to text |
| https://github.com/sponsors/007revad | (empty) | empty | Add link text or aria-label |
| /007revad/Synology_Docker_Export/blob/ma… | (empty) | empty | Add link text or aria-label |
| /007revad/Synology_Docker_Export/blob/ma… | (empty) | empty | Add link text or aria-label |
| /007revad/Synology_Docker_Export/blob/ma… | (empty) | empty | Add link text or aria-label |
| /007revad/Synology_Docker_Export/blob/ma… | (empty) | empty | Add link text or aria-label |
| /007revad/Synology_Docker_Export/blob/ma… | (empty) | empty | Add link text or aria-label |
| /007revad/Synology_Docker_Export/blob/ma… | (empty) | empty | Add link text or aria-label |
| <button> | (empty) | empty | Add button text or aria-label |
| <button> | (empty) | empty | Add button text or aria-label |
| <button> | (empty) | empty | Add button text or aria-label |
| <button> | (empty) | empty | Add button text or aria-label |
| <button> | (empty) | empty | Add button text or aria-label |
Links without text are announced as raw URLs by screen readers.
/007revad/Synology_Docker_Export; /007revad/Synology_Docker_Export/blob/main/images/icon.png; https://github.com/007revad/Synology_Docker_Export/releases; https://github.com/sponsors/007revad; /007revad/Synology_Docker_Export/blob/main/images/script.png; /007revad/Synology_Docker_Export/blob/main/images/v104.png; /007revad/Synology_Docker_Export/blob/main/images/exports.png; /007revad/Synology_Docker_Export/blob/main/images/import-1.png; /007revad/Synology_Docker_Export/blob/main/images/import-2.png; /007revad/Synology_Docker_Export/blob/main/images/import-3.png
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://docs.github.com; https://github.blog; https://github.blog/changelog; https://skills.github.com; https://docs.github.com; https://support.github.com; https://securitylab.github.com; https://maintainers.github.com; https://stars.github.com; https://archiveprogram.github.com (+1 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
Icon-only buttons need an aria-label so screen readers can announce them.
button.Primer_Brand__Button-module__Button___scH9Z (#252 on page); button.Primer_Brand__Button-module__Button___scH9Z (#669 on page); button#icon-button-2aae2d7b-0049-4ef5-894c-78422e2c5d67; button#action-menu-50c04912-9b48-45bf-b8a1-8ea901e828c0-button; button#_R_4idahl6k5_
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
DPrint StylesheetActionNo print stylesFIX
CHeading HierarchyAction29 headings, 2 skip(s)REVIEW
- H2 Navigation Menu
- H1 Sponsor 007revad/Synology_Docker_Export
- H3 Uh oh! skipped
- H2 Latest commit
- H2 History
- H2 Folders and files
- H2 Repository files navigation
- H1 Synology Docker Export duplicate H1
- H3 Description skipped
- H3 Download the script
- H3 Options
- H3 To run the script via task scheduler
- H3 To run the script via SSH
- H3 Troubleshooting
- H3 Screenshots
- H3 Importing
- H2 About
- H3 Topics
- H3 Resources
- H3 Stars
- H3 Watchers
- H3 Forks
- H2 Releases
- H2 Sponsor this project
- H2 Packages
- H2 Contributors
- H2 Languages
- H2 Footer
- H3 Footer navigation
A page should have only one H1. Multiple H1s dilute the document outline.
Multiple H1s blur the page's primary topic — screen-reader users and Google both prefer one H1.
Learn more ▾ ▴
HTML5's outline algorithm technically allows multiple H1s within sectioning content, but no browser implements it. In practice: one H1 per page. Use H2-H6 for subsections.
Source: WCAG 2.4.6 / Google Search Central
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.
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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
CTabindex Anti-PatternsAction0 positive, 8 -1-on-focusableREVIEW
CTap Target AdequacyAction9 tap target(s) too small or too close togetherREVIEW
B404 Error PageHTTP 404, custom pageREVIEW
BFavicon & Branding13 icon(s) detectedREVIEW
BDark Mode SupportDark mode detectedREVIEW
Detection limited to meta tags and inline styles.
CColor Contrast (Screenshot)Action20 text elements analyzed, 2 fail WCAG AAREVIEW
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 Sponsor 007revad/Syn… | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h1 Synology Docker Expo… | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h2 Navigation Menu | 19.73:1 | 3.0:1 | #000000 | #F6F8FA | Pass |
| h2 Latest commit | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h2 History | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h2 Folders and files | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h2 Repository files nav… | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h2 Footer | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 Uh oh! | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 Description | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 Download the script | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 Options | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 To run the script vi… | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 To run the script vi… | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 Troubleshooting | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 Screenshots | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 Importing | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| h3 Footer navigation | 14.71:1 | 3.0:1 | #000000 | #D1D9E0 | Pass |
| title GitHub - 007revad/Sy… | 1.00:1 | 4.5:1 | #000000 | #000000 | Fail |
| a Skip to content | 1.00:1 | 4.5:1 | #000000 | #000000 | Fail |
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.
BLighthouse Accessibility AuditsScore 88/100 — 4 failing, 28 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.
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 |
|---|
Description div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > div.markdown-heading > h3.heading-element |
These are opportunities to improve keyboard navigation in your application.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
div.markdown-heading > h1.heading-element > a > img div.markdown-heading > h1.heading-element > a > img |
article.markdown-body > p > a > img article.markdown-body > p > a > img |
article.markdown-body > p > a > img article.markdown-body > p > a > img |
article.markdown-body > p > a > img article.markdown-body > p > a > img |
article.markdown-body > p > a > img article.markdown-body > p > a > img |
article.markdown-body > p > a > img article.markdown-body > p > a > img |
article.markdown-body > p > a > img article.markdown-body > p > a > img |
article.markdown-body > p > a > img article.markdown-body > p > a > img |
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 |
|---|
article.markdown-body > div.markdown-heading > h1.heading-element > a article.markdown-body > div.markdown-heading > h1.heading-element > a |
div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a |
div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a |
div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a |
div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a |
div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a |
div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a |
div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a |
div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > a div.js-snippet-clipboard-copy-unpositioned > article.markdown-body > p > 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.
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.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
Terms nav > ul.list-style-none > li.mx-2 > a.Link--secondary |
Privacy nav > ul.list-style-none > li.mx-2 > a.Link--secondary |
Security nav > ul.list-style-none > li.mx-2 > a.Link--secondary |
Status nav > ul.list-style-none > li.mx-2 > a.Link--secondary |
Community nav > ul.list-style-none > li.mx-2 > a.Link--secondary |
Docs nav > ul.list-style-none > li.mx-2 > a.Link--secondary |
Contact nav > ul.list-style-none > li.mx-2 > a.Link--secondary |
Manage cookies ul.list-style-none > li.mx-2 > cookie-consent-link > button.Link--secondary |
Do not share my personal information ul.list-style-none > li.mx-2 > cookie-consent-link > button.Link--secondary |
These items highlight common accessibility best practices.
ALandmark Structure8 landmarksPASS
The skip-link anchor (e.g., `href="#main"`) points at an ID that has no corresponding element on the page. Activating the link does nothing -- a silent WCAG 2.4.1 failure that the visual link presence hides. Add `id="main"` (or whichever matches the href) to the target landmark.
Skip link points at an ID that doesn't exist on the page. The link looks fine visually but does nothing when activated -- silent WCAG 2.4.1 failure.
Learn more ▾ ▴
Find the target landmark (typically <main> or the first <h1>) and add `id="..."` matching the skip link's href fragment. Test by tabbing to the skip link and pressing Enter -- focus should jump to the target.
Source: WCAG 2.1 SC 2.4.1