Accessibility

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

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Checks

4 PASS 3 REVIEW 6 FIX

Link & Button Quality

Action

17 issue(s) across 363 links and 25 buttons

FIX

17 issue(s) across 363 links and 25 buttons

10 link(s) with generic text

Generic link text like 'click here' doesn't describe the destination.

Got: https://science.nasa.gov/missions/hubble/nasas-hubble-dazzles-with-young-star… ("Learn More"); https://science.nasa.gov/mission/hubble/hubble-news/hubble-social-media/hubbl… ("Read More"); https://science.nasa.gov/mission/hubble/hubble-news/hubble-social-media/stell… ("Read More"); https://science.nasa.gov/mission/hubble/science/citizen-science/ ("Read More"); https://science.nasa.gov/mission/hubble/observatory/science-operations/ ("Read More"); https://science.nasa.gov/mission/hubble/science/ai-hubble-science/ ("Read More"); https://science.nasa.gov/mission/hubble/observatory/hubble-vs-webb/ ("Read More"); https://science.nasa.gov/mission/hubble/science/science-highlights/ ("Read More"); https://science.nasa.gov/mission/hubble/science/explore-the-night-sky/ ("Read More"); https://science.nasa.gov/mission/hubble/multimedia/e-books/ ("Read More")

11 link(s) open in new tab without warning

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

Got: http://www.facebook.com/NASAHubble; http://twitter.com/NASAHubble; http://instagram.com/NASAHubble; https://www.nasa.gov/podcasts/universo-curioso-de-la-nasa/el-telescopio-de-la…; https://www.nasa.gov/podcasts/small-steps-giant-leaps/small-steps-giant-leaps…; https://www.nasa.gov/es/; https://www.facebook.com/NASA; https://www.instagram.com/nasa/; https://x.com/NASA; https://www.youtube.com/@NASA (+1 more)

7 button(s) with no accessible text

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

Got: button#global-navigation-trigger--mobile; button.hds-search-panel-mobile-trigger (#137 on page); button.hds-search-panel-bar-close-icon (#242 on page); button.hds-carousel-nav-arrow (#2484 on page); button.hds-carousel-nav-arrow (#2633 on page); button.hds-carousel-nav-arrow (#2751 on page); button.hds-carousel-nav-arrow (#2817 on page)

342 link(s) with descriptive text

363 links

0 empty

10 generic text

11 new tab

7 empty buttons

Element	Text	Issue	Suggested Fix
http://www.facebook.com/NASAHubble	Link to Facebook.	new tab	Add '(opens in new tab)' to text
http://twitter.com/NASAHubble	Link to Twitter.	new tab	Add '(opens in new tab)' to text
http://instagram.com/NASAHubble	Link to Instagram.	new tab	Add '(opens in new tab)' to text
https://science.nasa.gov/missions/hubble…	Article6 Min ReadNASA’s Hubb…	img no alt	Add alt attribute to the image
https://science.nasa.gov/missions/hubble…	Article3 Min ReadHubble Spies …	img no alt	Add alt attribute to the image
https://science.nasa.gov/missions/hubble…	Article4 Min ReadNASA’s Hubb…	img no alt	Add alt attribute to the image
https://science.nasa.gov/missions/webb/n…	Article6 Min ReadNASA Webb, Hu…	img no alt	Add alt attribute to the image
https://science.nasa.gov/missions/hubble…	5 Min ReadNASA Awards Astrophy…	img no alt	Add alt attribute to the image
https://science.nasa.gov/missions/hubble…	4 Min ReadNASA’s Hubble Revi…	img no alt	Add alt attribute to the image
https://science.nasa.gov/missions/hubble…	5 Min ReadNASA’s Hubble Unex…	img no alt	Add alt attribute to the image
https://www.nasa.gov/missions/chandra/na…	6 Min ReadNASA Discovers Crash…	img no alt	Add alt attribute to the image
https://science.nasa.gov/missions/hubble…	Learn More	generic text	Replace with descriptive text
Before: Learn More Suggested: Nasas Hubble Dazzles With Young Stars In Trifid Nebula
https://science.nasa.gov/gallery/hubbles…	Hubble’s Universe Gallery142…	img no alt	Add alt attribute to the image
https://science.nasa.gov/gallery/hubble-…	Hubble Mission Operations Gall…	img no alt	Add alt attribute to the image
https://science.nasa.gov/gallery/hubble-…	Hubble Astronauts Gallery46 Im…	img no alt	Add alt attribute to the image
https://science.nasa.gov/mission/hubble/…	Read More	generic text	Replace with descriptive text
Before: Read More Suggested: Hubbles Messier Marathon 2026
https://science.nasa.gov/mission/hubble/…	Read More	generic text	Replace with descriptive text
Before: Read More Suggested: Stellar Construction Zones
https://science.nasa.gov/mission/hubble/…	Read More	generic text	Replace with descriptive text
Before: Read More Suggested: Citizen Science
https://science.nasa.gov/mission/hubble/…	Read More	generic text	Replace with descriptive text
Before: Read More Suggested: Science Operations
https://www.nasa.gov/podcasts/universo-c…	Listen Here	new tab	Add '(opens in new tab)' to text
https://www.nasa.gov/podcasts/small-step…	Listen Here	new tab	Add '(opens in new tab)' to text
https://science.nasa.gov/mission/hubble/…	Read More	generic text	Replace with descriptive text
Before: Read More Suggested: Ai Hubble Science
https://science.nasa.gov/mission/hubble/…	Read More	generic text	Replace with descriptive text
Before: Read More Suggested: Hubble Vs Webb
https://science.nasa.gov/mission/hubble/…	Read More	generic text	Replace with descriptive text
Before: Read More Suggested: Science Highlights
https://science.nasa.gov/mission/hubble/…	Read More	generic text	Replace with descriptive text
Before: Read More Suggested: Explore The Night Sky
https://science.nasa.gov/mission/hubble/…	Read More	generic text	Replace with descriptive text
Before: Read More Suggested: E Books
https://science.nasa.gov/mission/tess/	TESS (Transiting Exoplanet Sur…	img no alt	Add alt attribute to the image
https://science.nasa.gov/mission/europa-…	Europa Clipper	img no alt	Add alt attribute to the image
https://science.nasa.gov/mission/roman-s…	Roman …	img no alt	Add alt attribute to the image
https://science.nasa.gov/mission/chandra…	Chandra X-ray Observatory …	img no alt	Add alt attribute to the image
https://www.nasa.gov/es/	NASA en Español	new tab	Add '(opens in new tab)' to text
https://www.facebook.com/NASA	NASA on Facebook	new tab	Add '(opens in new tab)' to text
https://www.instagram.com/nasa/	NASA on Instagram	new tab	Add '(opens in new tab)' to text
https://x.com/NASA	NASA on X	new tab	Add '(opens in new tab)' to text
https://www.youtube.com/@NASA	NASA on YouTube	new tab	Add '(opens in new tab)' to text
http://oig.nasa.gov/	Office of the IG	new tab	Add '(opens in new tab)' to text
<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
<button>	(empty)	empty	Add button text or aria-label
<button>	(empty)	empty	Add button text or aria-label

360 links and buttons have descriptive text

Generic link text like 'click here' doesn't describe the destination.

https://science.nasa.gov/missions/hubble/nasas-hubble-dazzles-with-young-star… ("Learn More"); https://science.nasa.gov/mission/hubble/hubble-news/hubble-social-media/hubbl… ("Read More"); https://science.nasa.gov/mission/hubble/hubble-news/hubble-social-media/stell… ("Read More"); https://science.nasa.gov/mission/hubble/science/citizen-science/ ("Read More"); https://science.nasa.gov/mission/hubble/observatory/science-operations/ ("Read More"); https://science.nasa.gov/mission/hubble/science/ai-hubble-science/ ("Read More"); https://science.nasa.gov/mission/hubble/observatory/hubble-vs-webb/ ("Read More"); https://science.nasa.gov/mission/hubble/science/science-highlights/ ("Read More"); https://science.nasa.gov/mission/hubble/science/explore-the-night-sky/ ("Read More"); https://science.nasa.gov/mission/hubble/multimedia/e-books/ ("Read More")

Why this matters

Generic anchor text ('click here', 'read more', 'learn more') tells screen readers and search engines nothing about the destination.

Learn more ▾

Out-of-context lists of links read by AT (one navigation pattern) become useless when every link says 'click here'. Use the destination's title or topic as anchor text. Doubles as SEO win — Google passes anchor-text relevance to the destination.

Source: WCAG 2.4.4 / Google Search Central

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

http://www.facebook.com/NASAHubble; http://twitter.com/NASAHubble; http://instagram.com/NASAHubble; https://www.nasa.gov/podcasts/universo-curioso-de-la-nasa/el-telescopio-de-la…; https://www.nasa.gov/podcasts/small-steps-giant-leaps/small-steps-giant-leaps…; https://www.nasa.gov/es/; https://www.facebook.com/NASA; https://www.instagram.com/nasa/; https://x.com/NASA; https://www.youtube.com/@NASA (+1 more)

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#global-navigation-trigger--mobile; button.hds-search-panel-mobile-trigger (#137 on page); button.hds-search-panel-bar-close-icon (#242 on page); button.hds-carousel-nav-arrow (#2484 on page); button.hds-carousel-nav-arrow (#2633 on page); button.hds-carousel-nav-arrow (#2751 on page); button.hds-carousel-nav-arrow (#2817 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

404 Error Page

Action

Soft 404 detected

FIX

Soft 404 detected

Soft 404: server returns HTTP 200 for non-existent pages

The server returns HTTP 200 for a path that does not exist. Search engines will index these pages, diluting your real content. Configure your server to return a proper 404 status code for missing pages.

Got: Status: 200 for /beavercheck-404-test-hx5cnd

404 Page Quality ✗ Soft 404 (HTTP 200)

Status Code: HTTP 200

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.

Web Manifest

Action

Invalid JSON

FIX

Invalid JSON

Manifest contains invalid JSON

Manifest at https://hubblesite.org/site.webmanifest contains invalid JSON. Browsers cannot parse it.

Got: https://hubblesite.org/site.webmanifest

Manifest contains invalid JSON.

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: #ffffff

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

No navigation patterns

FIX

No navigation patterns

2 navigation landmark(s) detected

No breadcrumbs, search, or skip link detected

These navigation aids help users orient themselves and find content efficiently, especially on large sites.

Breadcrumbs

Skip Link

Labeled Navigation 2 <nav> element(s)

Hamburger Menu

Sticky Navigation Cannot reliably detect (CSS-based)

1 of 6 testable patterns navigation patterns detected. Limited navigation support. Consider adding breadcrumbs, search, and skip link.

Landmark Structure

6 landmarks

REVIEW

6 landmarks

<main> landmark present

2 <nav> landmark(s) found

1 of 2 <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.

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

Favicon & Branding

Action

18 icon(s) detected

REVIEW

18 icon(s) detected

No favicon.ico at site root

Some older browsers, bookmark tools, and RSS readers look for /favicon.ico. Add one as a fallback.

HTML icon links detected

Apple touch icon present

Multiple icon sizes detected

✗ favicon.ico Missing

✓ PNG Icons Present

✓ Apple Touch Present

✗ SVG Favicon Missing

✗ Manifest Icons Missing

✓ Multiple Sizes Present

Color Contrast (Screenshot)

Action

20 text elements analyzed, 20 fail WCAG AA

REVIEW

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

0 pass 20 fail WCAG AA

h1 Hubble Space Telescope

1.00:1

#000000

needs 3.0:1 (large text)

32px · bottom of viewport

h2 Suggested Searches

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h2 Latest News

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h2 Image Galleries

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h2 What Did Hubble See on Your Birthday?

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h2 More Hubble Interactives

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h2 Hubble's Latest Features

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h2 NASA’s Hubble Captures Light Show Arou…

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h2 Hubble E-Books

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h2 Explore More Hubble

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h2 Discover More NASA Missions

1.00:1

#000000

needs 3.0:1 (large text)

24px · bottom of viewport

h3 News & Events

1.00:1

#000000

needs 3.0:1 (large text)

19px · above the fold

h3 Multimedia

1.00:1

#000000

needs 3.0:1 (large text)

19px · mid-page

h3 Highlights

1.00:1

#000000

needs 3.0:1 (large text)

19px · bottom of viewport

h3 Advancing Earth Observation at NASA Sinc…

1.00:1

#000000

needs 3.0:1 (large text)

19px · bottom of viewport

h3 NASA’s Curiosity Finds Organic Molecul…

1.00:1

#000000

needs 3.0:1 (large text)

19px · bottom of viewport

h3 NASA Wins Two Webby Awards, Five Webby P…

1.00:1

#000000

needs 3.0:1 (large text)

19px · bottom of viewport

h3 Missions

1.00:1

#000000

needs 3.0:1 (large text)

19px · bottom of viewport

h3 Humans in Space

1.00:1

#000000

needs 3.0:1 (large text)

19px · bottom of viewport

h3 Earth

1.00:1

#000000

needs 3.0:1 (large text)

19px · bottom of viewport

Show all checked elements (20)

Element	Ratio	Required	FG	BG	Result
h1 Hubble Space Telesco…	1.00:1	3.0:1	#000000	#000000	Fail
h2 Suggested Searches	1.00:1	3.0:1	#000000	#000000	Fail
h2 Latest News	1.00:1	3.0:1	#000000	#000000	Fail
h2 Image Galleries	1.00:1	3.0:1	#000000	#000000	Fail
h2 What Did Hubble See …	1.00:1	3.0:1	#000000	#000000	Fail
h2 More Hubble Interact…	1.00:1	3.0:1	#000000	#000000	Fail
h2 Hubble's Latest Feat…	1.00:1	3.0:1	#000000	#000000	Fail
h2 NASA’s Hubble Capt…	1.00:1	3.0:1	#000000	#000000	Fail
h2 Hubble E-Books	1.00:1	3.0:1	#000000	#000000	Fail
h2 Explore More Hubble	1.00:1	3.0:1	#000000	#000000	Fail
h2 Discover More NASA M…	1.00:1	3.0:1	#000000	#000000	Fail
h3 News & Events	1.00:1	3.0:1	#000000	#000000	Fail
h3 Multimedia	1.00:1	3.0:1	#000000	#000000	Fail
h3 Highlights	1.00:1	3.0:1	#000000	#000000	Fail
h3 Advancing Earth Obse…	1.00:1	3.0:1	#000000	#000000	Fail
h3 NASA’s Curiosity F…	1.00:1	3.0:1	#000000	#000000	Fail
h3 NASA Wins Two Webby …	1.00:1	3.0:1	#000000	#000000	Fail
h3 Missions	1.00:1	3.0:1	#000000	#000000	Fail
h3 Humans in Space	1.00:1	3.0:1	#000000	#000000	Fail
h3 Earth	1.00:1	3.0:1	#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.

A+

Heading Hierarchy

119 headings

PASS

119 headings

Single H1 present

H3 News & Events
H3 Multimedia
H2 Suggested Searches
H3 Highlights
H3 Advancing Earth Observation at NASA Since Release of Earthrise Photo
H3 NASA’s Curiosity Finds Organic Molecules Never Seen Before on Mars
H3 NASA Wins Two Webby Awards, Five Webby People’s Voice Awards
H3 Missions
H3 Humans in Space
H3 Earth
H3 The Solar System
H3 The Universe
H3 Science
H3 Aeronautics
H3 Technology
H3 Learning Resources
H3 About NASA
H3 NASA en Español
H3 News & Events
H3 Multimedia
H3 Highlights
H3 NASA’s Curiosity Finds Organic Molecules Never Seen Before on Mars
H3 NASA on Track for Future Missions with Initial Artemis II Assessments
H3 NASA’s Hubble Dazzles With Young Stars in Trifid Nebula
H3 Highlights
H3 Artemis II Mission Milestones: An Image and Video Recap
H3 NASA Answers Your Most Pressing Artemis II Questions
H3 Artemis II Podcast Series
H3 Highlights
H3 NASA’s 777 Aircraft Returns Home with Science Flights on the Horizon
H3 Earth Day 2026: Posters and Virtual Backgrounds
H3 Advancing Earth Observation at NASA Since Release of Earthrise Photo
H3 Highlights
H3 NASA’s Curiosity Finds Organic Molecules Never Seen Before on Mars
H3 Amendment 51: C.6 Development and Advancement of Lunar Instrumentation Not Solicited in ROSES-25
H3 Twin NASA Control Rooms Support Artemis Safety, Success
H3 Highlights
H3 NASA’s Hubble Dazzles With Young Stars in Trifid Nebula
H3 ‘Interstellar Glaciers’: NASA’s SPHEREx Maps Vast Galactic Ice Regions
H3 NASA Finds Young Stars Dim in X-rays Surprisingly Quickly
H3 Highlights
H3 NASA’s 777 Aircraft Returns Home with Science Flights on the Horizon
H3 Integrated Modeling Virtual Institute (IMVI)
H3 Early Career Investigator Program – Earth Science (ROSES A.11)
H3 Highlights
H3 NASA, Organ Sharing Network UNOS to Study Faster Organ Transport
H3 2025-2026 Dream with Us Design Challenge Winners
H3 Indoor Testing Facilities available at the NASA Unmanned Autonomy Research Complex (NUARC)
H3 Highlights
H3 NASA’s Curiosity Finds Organic Molecules Never Seen Before on Mars
H3 Amendment 51: C.6 Development and Advancement of Lunar Instrumentation Not Solicited in ROSES-25
H3 Snow in the Shadow of the Andes
H3 Highlights
H3 Join the Artemis Mission to the Moon
H3 Highlights
H3 NASA, Organ Sharing Network UNOS to Study Faster Organ Transport
H3 NASA Wins Two Webby Awards, Five Webby People’s Voice Awards
H3 Advancing Earth Observation at NASA Since Release of Earthrise Photo
H3 Highlights
H3 La NASA anuncia la cobertura de la misión lunar Artemis II
H3 Agenda diaria de la misión a la Luna de Artemis II de la NASA
H3 La NASA refuerza Artemis: añade una misión y perfecciona su arquitectura general
H1 Hubble Space Telescope
H2 Latest News
H3 Trifid Nebula Tour
H2 Image Galleries
H3 Hubble’s Universe Gallery
H3 Hubble Mission Operations Gallery
H3 Hubble Astronauts Gallery
H2 What Did Hubble See on Your Birthday?
H2 More Hubble Interactives
H3 Control Center 360-Degree Tour
H3 Hearing Hubble
H3 Hubble’s Cosmic Adventure
H3 What is Hubble Observing?
H3 Name that Nebula!
H3 Lost Universe
H3 Hubble's Skymap
H3 Hubble Spacecraft 360 Degree Tour
H3 Hubble Astronaut Fun Facts
H3 Control Center 360-Degree Tour
H3 Hearing Hubble
H3 Hubble’s Cosmic Adventure
H3 What is Hubble Observing?
H3 Name that Nebula!
H3 Lost Universe
H3 Hubble's Skymap
H3 Hubble Spacecraft 360 Degree Tour
H3 Hubble Astronaut Fun Facts
H3 Control Center 360-Degree Tour
H2 Hubble's Latest Features
H3 Hubble's Messier Marathon 2026
H3 Hubble's Stellar Construction Zones
H3 Hubble & Citizen Science
H3 Science Operations
H3 Universo curioso de la NASA
H3 Hubble: An Engineering Marvel
H3 AI and Hubble Science
H3 Hubble 3D Models
H3 New Lithographs
H2 NASA’s Hubble Captures Light Show Around Rapidly Dying Star
H2 Hubble E-Books
H3 Hubble’s Beautiful Universe
H3 Reshaping Our Cosmic View: Hubble Science Highlights
H3 Hubble: An Overview of the Space Telescope
H3 Black Holes: Into the Vortex
H2 Explore More Hubble
H3 On The Shoulders of a Giant
H3 Hubble Science Highlights
H3 Explore the Night Sky
H3 Hubble E-books
H2 You Can Do NASA Science!
H3 Participate in authentic research via NASA Citizen Science.
H2 Discover More NASA Missions
H3 TESS (Transiting Exoplanet Survey Satellite)
H3 Roman
H3 Chandra X-ray Observatory
H3 National Aeronautics and Space Administration
H3 Follow NASA

Alt Text Quality

All 96 images OK

PASS

All 96 images OK

18 image(s) with alt text over 125 characters

24 decorative image(s) correctly marked

54 image(s) with good alt text

96 images 54 good alt text 24 decorative

Issue	Count
too long	18 image(s)

Form Accessibility

1 of 9 controls have issues

PASS

1 of 9 controls have issues

1 control(s) without accessible label

Form controls need a <label>, aria-label, or aria-labelledby for screen readers.

Got: <input type="submit" id="gform_submit_button_45">

8 control(s) properly labeled

9 controls

8 labeled

0 placeholder only

1 unlabeled

Control	Type	Label	Method
#search-field-en-small--desktop	search	Search	for/id
#search-field-en-small--desktop	search	Search	for/id
ak_hp_textarea	textarea	Δ	none
#choice_45_1_0	radio	Yes	for/id
#choice_45_1_1	radio	No	for/id
#choice_45_1_2	radio	Partly	for/id
#input_45_3	textarea	What were you looking for?(Required)	for/id
#input_45_4	textarea	What were you hoping to accomplish by visiting our website?(Required)	for/id
#gform_submit_button_45	submit	(none)	none

Form controls need a <label>, aria-label, or aria-labelledby for screen readers.

Why this matters

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+

Lighthouse Accessibility Audits

Score 95/100 — 1 failing, 27 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.

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.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
header.hds-nasa-header > div.usa-nav-container > div.grid-col > button#global-navigation-trigger--mobile `header.hds-nasa-header > div.usa-nav-container > div.grid-col > button#global-navigation-trigger--mobile`
header.hds-nasa-header > div.usa-nav-container > div.grid-col > button.hds-search-panel-mobile-trigger `header.hds-nasa-header > div.usa-nav-container > div.grid-col > button.hds-search-panel-mobile-trigger`
div.hds-card-carousel > div.hds-card-carousel-cards > div.hds-cards-included > button.hds-carousel-nav-arrow `div.hds-card-carousel > div.hds-card-carousel-cards > div.hds-cards-included > button.hds-carousel-nav-arrow`
div.hds-card-carousel > div.hds-card-carousel-cards > div.hds-cards-included > button.hds-carousel-nav-arrow `div.hds-card-carousel > div.hds-card-carousel-cards > div.hds-cards-included > button.hds-carousel-nav-arrow`
div.hds-card-carousel > div.hds-card-carousel-cards > div.hds-cards-included > button.hds-carousel-nav-arrow `div.hds-card-carousel > div.hds-card-carousel-cards > div.hds-cards-included > button.hds-carousel-nav-arrow`
div.hds-card-carousel > div.hds-card-carousel-cards > div.hds-cards-included > button.hds-carousel-nav-arrow `div.hds-card-carousel > div.hds-card-carousel-cards > div.hds-cards-included > button.hds-carousel-nav-arrow`

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.

○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

●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.

●ARIA attributes are used as specified for the element's role

●`[aria-hidden="true"]` elements do not contain focusable descendents

●ARIA input fields have accessible names

●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

●Touch targets have sufficient size and spacing.

●Heading elements appear in a sequentially-descending order

●Document has a main landmark.

●Deprecated ARIA roles were not used

●ARIA IDs are unique

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○Elements with `role="dialog"` or `role="alertdialog"` 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.

○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.