Back to Search
sfei.org favicon

sfei.org

https://sfei.org· First analyzed 28 May 2026· Updated 28 May 2026
Export
sfei.org
Desktop screenshot of sfei.org
Mobile screenshot of sfei.org
Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.26.12.85

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

cash.ns.cloudflare.com.maya.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
377 ms10%
Speed Index
490 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
61 KB
179 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Drupal

Technology Stack

12 Technologies Detected

Libraries

2
jQuery
Lightbox

CSS Frameworks

2
Bootstrap
Tailwind CSS

Icon Libraries

2
Font AwesomeMaterial Icons

Analytics

2
Google Analytics
Google Analytics 4

UI Components

1
Slick Carousel

Fonts

1
Google Fonts

Email Marketing

1
Mailchimp

CDN

1
Cloudflare

SEO Analysis

C67/100
20
7
1
Meta Tags9/15
Content10/12
Headings7/8
Technical17/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social0/5
Freshness2/4
Mobile4/4
Indexability3/3
S
sfei.orgsfei.org

Science for people and nature | San Francisco Estuary Institute

No description available for this page.

Title Length63 chars

Recommended: 50-60 chars (~377px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

8 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

21 rules

Local SEO

Local Search Readiness

9/100
Poor
3 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D42/100
Bot Access
15/25
Machine Read.
11/25
Schema Data
0/25
Citation
16/25

AI Bot Access

6/14 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
nav
Text ratio:2%
Words:1,052
Token eff.:Optimal
Sections/1K:18.1
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary50w
Descriptive Headingsavg 4.6w
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (8)
AI readiness recommendation preview...
Upgrade to view recommendations

Sponsored

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.
A
84/100
13
Passed
1
Critical
1
Warnings
Images & Alt Text
20/20
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
13/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

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.
79/100
A+
6 mg
CO₂e / view
61.5 KB
Page Weight
95%
Cleaner Than
New Visitor
7 mg
vs
Returning (cached)
4 mg
Annual (10K/mo)
744 g
Emission Segments
Data Center
<0.001 g
Network
2 mg
Device
4 mg
Resource Breakdown
Images
39.9 KB
HTML
21.2 KB
Other
451 B
Green Hosting Verified
Cloudflare
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A

Security Score

86%Very Good
Static / Informational

HTTPS

WAF

49d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

17.04.2026

Valid Until

16.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

sfei.org*.sfei.org

SHA-256 Fingerprint

51:E0:50:9B:F4:8D:6C:73:87:E2:EE:2F:82:8C:34:E8:3C:C9:28:2B...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔴 No Cache(must-revalidate, no-cache, private)
cf-cache-status
DYNAMIC
cf-ray🇺🇸 Washington DC
a02f8e0f28beef61-IAD
content-encoding
⚡ Brotli(br)
content-language
en
content-type
text/html; charset=UTF-8
Good Warning Issue

Email Infrastructure

Google Workspace

Score

65

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt2.aspmx.l.google.com
aspmx3.googlemail.com
aspmx.l.google.com
alt1.aspmx.l.google.com

+1 more

Domain Information

sfei.org

Domain Age
31y 4m

Created

03.02.1995

Expires

04.02.2027

Last Updated

10.01.2026

Registrar

Cloudflare, Inc.

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

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.
C
67/100
Mobile Friendly1 breakpoint
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, shrink-to-fit=no
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Work Sans

WCAG Partial
80/100
Readability
/30
24/30

16px · LH 1.44

Hierarchy
/20
20/20

4.5x ratio · ✓ H1→H6

WCAG
/25
17/25

1:1 min contrast

Performance
/25
19/25

System fonts

Heading Font

Work Sans

Sans72px

Body Font

Work Sans

Sans16px

Contrast Ratio

1:1

5 issues

Reading Comfort

~38 CPL

Narrow lines
72px
h1
42px
h2
30px
h3
16px
p

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.44 ratio (ideal range 1.4–1.6).

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 4.5x larger than body text.

GGoogle FontsFlesch 0

Color Palette

8 unique colors
21:1 AAA Dark
#000000
Background· 38%
#ffffff
Background· 17.5%
#f5a949
Primary· 20.7%
#624a51
Secondary· 8%
#d5d1ca
Secondary· 3.3%
#f9e9d4
Accent· 1.2%

Business & Marketing Stack

2 Tools Detected

Advanced

Marketing Automation

1
MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Well-developed marketing technology stack

Sponsored

Scripts & Styles

30 Resources

20
Scripts
10
Styles
3
Async
2
Defer

Top Script Sources

local(15)use.fontawesome.com(2)chimpstatic.com(1)san-francisco-estuary-institute.givecloud.co(1)googletagmanager.com(1)

Website Identity

sfei.org

info@sfei.org
31 years old
Location detected: 🇨🇦 Canadavia ip
Cloudflare, Inc.📧 Google Workspaceen

Sponsored

Last analyzed: 28 May 2026 at 19:10

Historical Analysis & Change Tracking