Accessibility
· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.FAlt Text QualityAction8 of 8 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 QualityAction5 issue(s) across 55 links and 1 buttonsFIX
| Element | Text | Issue | Suggested Fix |
|---|---|---|---|
| /2025/07/21/jr3-workshop-recap/index.htm… | (empty) | empty | Add link text or aria-label |
| /2023/10/06/storymapjs-update/index.html | (empty) | empty | Add link text or aria-label |
| /2023/01/31/amyjo-brown/index.html | (empty) | empty | Add link text or aria-label |
| https://github.com/NUKnightLab | open-source | new tab | Add '(opens in new tab)' to text |
| https://goo.gl/maps/pfaGLUP5CWs | map | new tab | Add '(opens in new tab)' to text |
| https://knightlab.northwestern.edu | (empty) | empty | Add link text or aria-label |
| http://www.twitter.com/knightlab | Knight Lab on Twitter | new tab | Add '(opens in new tab)' to text |
| https://www.facebook.com/knightlab | Knight Lab on Facebook | new tab | Add '(opens in new tab)' to text |
| https://github.com/NUKnightLab/ | Knight Lab on GitHub | new tab | Add '(opens in new tab)' to text |
| http://www.northwestern.edu/ | Northwestern University | new tab | Add '(opens in new tab)' to text |
| http://www.medill.northwestern.edu/ | Medill School of Journalism, M… | new tab | Add '(opens in new tab)' to text |
| http://www.mccormick.northwestern.edu/ | McCormick School of Engineerin… | new tab | Add '(opens in new tab)' to text |
| <button> | (empty) | empty | Add button text or aria-label |
Links without text are announced as raw URLs by screen readers.
/2025/07/21/jr3-workshop-recap/index.html; /2023/10/06/storymapjs-update/index.html; /2023/01/31/amyjo-brown/index.html; https://knightlab.northwestern.edu
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[href="http://www.medill.northwestern.edu/"]; a[href="http://www.mccormick.northwestern.edu/"]
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://github.com/NUKnightLab; https://goo.gl/maps/pfaGLUP5CWs; http://www.twitter.com/knightlab; https://www.facebook.com/knightlab; https://github.com/NUKnightLab/; http://www.northwestern.edu/
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.button-plain (#36 on page)
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
F404 Error PageActionSoft 404 detectedFIX
The server returned HTTP 200 for a non-existent path. Search engines will index this page as real content. Configure your server to return HTTP 404 for missing pages.
FWeb ManifestActionInvalid JSONFIX
Manifest contains invalid JSON.
DDark Mode SupportActionTheme color onlyFIX
Detection limited to meta tags and inline styles.
DPrint StylesheetActionNo print stylesFIX
DLighthouse Accessibility AuditsActionScore 66/100 — 5 failing, 11 passedFIX
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
When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
body > nav#navbar-product-top > div.nav-mobile-menu > button.button-plain body > nav#navbar-product-top > div.nav-mobile-menu > button.button-plain |
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 |
|---|
body > header.header-image > div.header-image-content > img.logo body > header.header-image > div.header-image-content > img.logo |
div.grid > div.column-2 > a > img div.grid > div.column-2 > a > img |
div.grid-size-2 > div.grid-item > a > img div.grid-size-2 > div.grid-item > a > img |
div.grid-size-2 > div.grid-item > a > img div.grid-size-2 > div.grid-item > 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 |
|---|
div.column-10 > div.cards > div.card > a div.column-10 > div.cards > div.card > a |
div.column-10 > div.cards > div.card > a div.column-10 > div.cards > div.card > a |
div.column-10 > div.cards > div.card > a div.column-10 > div.cards > div.card > a |
div.container > div.grid > div.column-2 > a div.container > div.grid > div.column-2 > 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.
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 |
|---|
Latest updates about our work, observations and experimentation in the Knight L… div.container > div.grid > div.column-10 > p.dek |
LAB div.card > article > p.dateline > a |
PROJECTS div.card > article > p.dateline > a |
JUL 21, 2025 div.card > article > p.dateline > time |
LAB div.card > article > p.dateline > a |
PROJECTS div.card > article > p.dateline > a |
OCT 6, 2023 div.card > article > p.dateline > time |
by JOE GERMUSKA div.cards > div.card > article > p.byline |
PEOPLE div.card > article > p.dateline > a |
JAN 31, 2023 div.card > article > p.dateline > time |
We build easy-to-use tools that can help you tell better stories. div.container > div.grid > div.column-10 > p.lead |
Easy-to-make frame comparisons. div.card > a > article > p.product-tagline |
Easy-to-make VR stories. div.card > a > article > p.product-tagline |
Seamless inline audio. div.card > a > article > p.product-tagline |
Tell the story behind the numbers. div.card > a > article > p.product-tagline |
Maps that tell stories. div.card > a > article > p.product-tagline |
Easy-to-make, beautiful timelines. div.card > a > article > p.product-tagline |
Living documents and how-to guides developed by the Knight Lab community. div.container > div.grid > div.column-10 > p.lead |
Live streaming is complicated but we can help. div.card > a > article > p.product-tagline |
(847) 467-4971 div.grid > div.grid-item > address > span.tel |
1845 SHERIDAN ROAD div.grid-item > address > span.address > span.street-address |
FISK #109 & #111 div.grid-item > address > span.address > span.room-num |
EVANSTON, address > span.address > div.address-group > span |
IL address > span.address > div.address-group > span |
60208 address > span.address > div.address-group > span |
© COPYRIGHT 2017-2023 NORTHWESTERN UNIVERSITY div.container > div.grid > div.grid-item > span.copyright |
These are opportunities to improve the legibility of your content.
Best practices
One main landmark helps screen reader users navigate a web page. Learn more about landmarks.
Performance issues directly impact user engagement and conversion rates.
| Failing Elements |
|---|
html html |
These items highlight common accessibility best practices.
CLandmark StructureAction15 landmarksREVIEW
Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.
Without a <main> landmark, screen-reader users can't skip past the navigation to the page content — every page starts with re-reading the menu.
Learn more ▾ ▴
The <main> element marks the page's primary content area. Assistive tech offers a 'jump to main' shortcut — but only if <main> exists. Without it, every page navigation forces re-reading the header. Wrap your primary content in a single <main>.
Source: WAI-ARIA / WCAG 2.4.1
Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.
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
BHeading Hierarchy21 headingsREVIEW
- H2 Latest News
- H3 What if news avoiders are right, and you don’t need journalism?
- H3 A Big Change That Will Probably Affect Your Storymaps
- H3 Introducing AmyJo Brown, Knight Lab Professional Fellow
- H2 Storytelling Tools
- H3 Juxtapose JS
- H3 Scene VR
- H3 Soundcite JS
- H3 Storyline JS
- H3 StoryMap JS
- H3 Timeline JS
- H2 Studio
- H2 Guides
- H3 Live Streaming Guide for Journalists
- H3 Social Media Guide for High School Journalists
- H3 Design Resources
- H2 Students and Community
- H2 Local News Initiative
- H2 Device Lab
- H2 Research
- H2 About
Every page should have one H1 that describes the page content.
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
BFavicon & Branding4 icon(s) detectedREVIEW
CColor Contrast (Screenshot)Action20 text elements analyzed, 3 fail WCAG AAREVIEW
Analyzes text contrast against the actual rendered page, including background images, gradients, and overlays that CSS-based tools cannot detect.
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 Latest News | 2.59:1 | 3.0:1 | #000000 | #4E5051 | Fail |
| h2 Storytelling Tools | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 Studio | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 Guides | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 Students and Communi… | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 Local News Initiativ… | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 Device Lab | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 Research | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h2 About | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h3 What if news avoider… | 1.42:1 | 3.0:1 | #000000 | #262829 | Fail |
| h3 A Big Change That Wi… | 1.25:1 | 3.0:1 | #000000 | #1C1E1F | Fail |
| h3 Introducing AmyJo Br… | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h3 Juxtapose | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h3 Scene | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h3 Soundcite | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h3 Storyline | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h3 StoryMap | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h3 Timeline | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h3 Live Streaming Guide… | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | Pass |
| h3 Social Media Guide f… | 21.00:1 | 3.0:1 | #000000 | #FFFFFF | 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.