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salk.edu

https://salk.edu· First analyzed 23 Apr 2026· Updated 23 Apr 2026
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salk.edu
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Hosting Provider

Pantheon
pantheon.io

IP Address

23.185.0.3

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

Pantheon

Server

Nginx

CDN

Fastly

Nameservers

ns3.salk.edu.silver.ad.salk.edu.ns2.salk.edu.ns11.salk.edu.+5 more

Performance

100

Core Web Vitals

Weight

First Contentful Paint
494 ms10%
Speed Index
642 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
4.2 MB
117 requests

Image Optimization

Lazy LoadResponsiveUploadcare
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
CMS
WordPress
Infrastructure
Hosting
Pantheon
CDN
Fastly

Technology Stack

22 Technologies Detected

Plugins

8
Cookie NoticeRevsliderTranslatepress MultilingualAdd To Any
Gravity Forms
Gp Easy Passthrough
Yoast SEO
Gravity Forms

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

UI Components

2
SwiperSlick Carousel

CSS Frameworks

2
Bootstrap
Tailwind CSS

Libraries

1
jQueryv3.7.1

Other

1
GSAP

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Email Marketing

1
Constant Contact

Web Servers

1
Nginx

SEO Analysis

A80/100
24
7
1
Meta Tags10/15
Content10/12
Headings5/8
Technical25/25
E-E-A-T2/7
Images3/7
Links5/5
URL5/5
Social4/5
Freshness4/4
Mobile4/4
Indexability3/3
S
salk.edusalk.edu

Salk Institute for Biological Studies

THE POWER OF SCIENCE - We explore the very foundations of life for the benefit of all.

Title Length37 chars

Recommended: 50-60 chars (~211px / 580px)

Description Length86 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (28/29) — critical for accessibility and SEO

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

23 URLs

23 sub-sitemaps

robots.txt

9 rules

Sitemap reference found

Allows all crawlers

Local SEO

Local Search Readiness

24/100
Needs Work
8 11

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AI & LLM Readiness

D50/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
7/25
Citation
16/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:2%
Words:644
Token eff.:Optimal

Structured Data

4 JSON-LD
Organization×1.1WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary1660w
Descriptive Headingsavg 6.2w
Canonical URL
Open Graph3/3
Twitter Card1/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (11)
AI readiness recommendation preview...
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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
B
72/100
13
Passed
4
Critical
1
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
17/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
15/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
22/100
F
529 mg
CO₂e / view
4.2 MB
Page Weight
15%
Cleaner Than
New Visitor
604 mg
vs
Returning (cached)
302 mg
Annual (10K/mo)
63.4 kg
Emission Segments
Data Center
118 mg
Network
127 mg
Device
284 mg
Resource Breakdown
JavaScript
675.1 KB
Images
3.1 MB
CSS
392.3 KB
Fonts
1.2 KB
HTML
60.7 KB
Other
1.6 KB
Green Hosting Not Verified
Pantheon
8 recommendations
  • •Carbon footprint recommendation preview...
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F

Security Score

36%Critical
Interactive

HTTPS

No WAF

37d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

01.03.2026

Valid Until

30.05.2026

Subject Alternative Names (2)

salk.eduwww.salk.edu

SHA-256 Fingerprint

CD:3B:26:D9:84:BC:88:52:68:52:1F:4E:C8:99:8A:1D:16:72:CC:B8...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges
bytes
age
30897
cache-control
🔵 1 Week(public, max-age=604800)
content-encoding
📦 Gzip(gzip)
content-length
61888
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

mxa-004b8b01.gslb.pphosted.com
mxb-004b8b01.gslb.pphosted.com

Domain Information

salk.edu

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Notice (WP)

Cookie Consent Banner
Cookie Notice (WP)
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Cookie Notice (WP)
Privacy policy page linked
Data Protection Officer mentioned

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
B
74/100
Mobile Friendly34 breakpoints
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
Viewport
width=device-width, initial-scale=1.0, maximum-scale=1.0,, minimum-scale=1.0 user-scalable=no
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica + Helvetica Neue

WCAG Partial
63/100
Readability
/30
23/30

18px · LH 1.70

Hierarchy
/20
15/20

3.33x ratio

WCAG
/25
12/25

1.26:1 min contrast

Performance
/25
13/25

System fonts

Heading Font

Helvetica

Sans60px

Body Font

Helvetica Neue

Sans18px

Contrast Ratio

1.26:1

10 issues

Reading Comfort

~35 CPL

Narrow lines
60px
h1
32px
h3
18px
p

✅ Excellent readability: 18px body text is ideal for all devices.

⚠️ Hard to read: Flesch score 32/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 1.3:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 3.3x larger than body text.

✅ System fonts: Zero font loading delay — best possible LCP impact.

GGoogle FontsBuy on MyFontsFlesch 32

Color Palette

11 unique colors
3.76:1 AA Large Dark
#736e6e
Other· 19.700000000000003%
#111111
Background· 17.999999999999996%
#bcb3ad
Primary· 8.5%
#abb3c2
Secondary· 6.6%
#92a8c6
Secondary· 5.5%
#6d5e55
Secondary· 5.2%
#dbd5ce
Border· 5.1%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
ContentsquareEnterprise

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

2

Categories

4

Total Tools

1

Enterprise

1

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

30 Resources

20
Scripts
10
Styles
11
Async
2
Defer

Top Script Sources

salk.edu(10)googletagmanager.com(3)connect.facebook.net(2)gstatic.com(1)assets.funraise.io(1)

Website Identity

Salk Institute for Biological Studies

Salk Institute for Biological Studies

Organization

THE POWER OF SCIENCE - We explore the very foundations of life for the benefit of all.

communications@salk.edu
www.salk.edu/
Location detected: 🇺🇸 United Statesvia ip
en

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Last analyzed: 23 Apr 2026 at 05:11

Historical Analysis & Change Tracking