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expasy.org

https://expasy.org· First analyzed 25 Apr 2026· Updated 25 Apr 2026
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expasy.org
Desktop screenshot of expasy.org
Mobile screenshot of expasy.org
Mobile

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Hosting Provider

University of Lausanne

IP Address

192.42.198.25

Site Location

🇨🇭 Switzerlandvia ip

Server Location

🇨🇭 Lausanne, Switzerland

ASN

AS559

Organization

University of Lausanne

Server

Nginx

Nameservers

dns2.sib.swiss.dns1.sib.swiss.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
682 ms10%
Speed Index
887 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
113 KB
22 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Framework
Alpine.js
Infrastructure
Hosting
University of Lausanne

Technology Stack

5 Technologies Detected

Frameworks

1
Alpine.js

CSS Frameworks

1
Tailwind CSS

Analytics

1
Matomo

Web Servers

1
Nginx

Languages

1
PHPv8.3.30

SEO Analysis

B79/100
24
3
1
Meta Tags13/15
Content11/12
Headings3/8
Technical23/25
E-E-A-T2/7
Images5/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
E
expasy.orgexpasy.org

Expasy - SIB Swiss Institute of Bioinformatics

ExPASy — free access to 160+ bioinformatics databases and tools including UniProtKB, SWISS-MODEL, STRING, and PROSITE. The SIB Swiss Institute of Bioinformat...

Description truncated.
Title Length46 chars

Recommended: 50-60 chars (~275px / 580px)

Description Length188 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing H1 tag — every page should have exactly one H1

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

182 URLs

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

15/100
Poor
4 13

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

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AI & LLM Readiness

C61/100
Bot Access
20/25
Machine Read.
16/25
Schema Data
12/25
Citation
13/25

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.txtvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
nav
Text ratio:4%
Words:2,277
Token eff.:Optimal
Sections/1K:8.8
Depth:1/5

Structured Data

3 JSON-LD
Article×1.2(min)Person×1.3Organization×1.1WebSiteSearchAction
sameAs entity links

Citation Readiness

Opening Summary35w
Descriptive Headingsavg 1.2w
Canonical URL
Open Graph3/3
Twitter Card3/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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
74/100
10
Passed
5
Critical
0
Warnings
Images & Alt Text
18/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
13/20
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
7/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
6/15
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.
75/100
A+
14 mg
CO₂e / view
113.4 KB
Page Weight
95%
Cleaner Than
New Visitor
16 mg
vs
Returning (cached)
8 mg
Annual (10K/mo)
1.7 kg
Emission Segments
Data Center
3 mg
Network
3 mg
Device
8 mg
Resource Breakdown
JavaScript
14.9 KB
Images
29.5 KB
CSS
22.3 KB
HTML
19.3 KB
Other
27.3 KB
Green Hosting Not Verified
University of Lausanne
3 recommendations
  • •Carbon footprint recommendation preview...
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A

Security Score

86%Very Good
Interactive

HTTPS

No WAF

54d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

21.03.2026

Valid Until

19.06.2026

Subject Alternative Names (15)

au.expasy.orgbo.expasy.orgbr.expasy.orgca.expasy.orgch.expasy.orgcn.expasy.orgexpasy.chexpasy.net+7 more

SHA-256 Fingerprint

7F:34:58:15:63:79:F5:DE:50:2F:B3:7C:4A:53:84:23:48:A3:CE:3C...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🟣 Private(private, must-revalidate)
content-encoding
📦 Gzip(gzip)
content-security-policy
default-src 'self'; font-src 'self' fonts.bunny.net data:; i...
content-type
text/html; charset=utf-8
date
Sat, 25 Apr 2026 22:59:32 GMT
expires
-1
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

90

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

expasy-org.mail.protection.outlook.com

Domain Information

expasy.org

Domain Age
26y 7m

Created

07.09.1999

Expires

07.09.2029

Last Updated

16.02.2026

Registrar

Network Solutions, LLC

DNSSEC
Not Enabled

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 Friendly
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
2 recommendations
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Source Sans pro

WCAG Partial
71/100
Readability
/30
24/30

16px · LH 1.50

Hierarchy
/20
8/20
WCAG
/25
17/25

2.71:1 min contrast

Performance
/25
22/25

System fonts

Heading Font

Source Sans pro

Sans

Body Font

Source Sans pro

Sans16px

Contrast Ratio

2.71:1

8 issues

Reading Comfort

Single Font Family

left aligned
24px
h2
16px
h3
16px
p

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

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

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 2.7:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

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

Buy on MyFontsFlesch 0

Color Palette

5 unique colors
Light
#ffffff
Background· 90.10000000000001%
#d5dcdd
Primary· 2.7%
#a17475
Secondary· 1.9%
#f2f0ef
Border· 1.7%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

2
Matomo (Piwik)Mid-Market
Google AnalyticsFree

User behavior and product analytics

1

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

4 Resources

3
Scripts
1
Styles
2
Async
0
Defer

Top Script Sources

matomo.sib.swiss(2)expasy.org(1)

Website Identity

Expasy

Expasy

Dataset

Expasy is the bioinformatics resource portal of the SIB Swiss Institute of Bioinformatics.

www.expasy.org/
26 years old
Location detected: 🇨🇭 Switzerlandvia ip
Network Solutions, LLC📧 Microsoft 365enEst. 1993

Sponsored

Last analyzed: 25 Apr 2026 at 22:59

Historical Analysis & Change Tracking