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butantan.gov.br

https://butantan.gov.br· First analyzed 01 May 2026· Updated 01 May 2026
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butantan.gov.br
Desktop screenshot of butantan.gov.br
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Mobile

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Hosting Provider

Akamai Technologies

IP Address

2.16.168.111

Site Location

🇧🇷 Brazilvia tld

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS20940

Server

Apache

CDN

Akamai

WAF

Akamai

Nameservers

a12-67.akam.net.a13-67.akam.net.a18-66.akam.net.a10-65.akam.net.+2 more

Performance

87

Core Web Vitals

Weight

First Contentful Paint
1.6 s10%
Speed Index
2.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
19.4 MB
98 requests

Image Optimization

Lazy LoadWebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
Akamai Technologies
CDN
Akamai

Technology Stack

13 Technologies Detected

Libraries

2
jQueryv3.6.0
AOS

UI Components

2
Slick CarouselOwl Carousel

CSS Frameworks

2
Bootstrap
Tailwind CSS

Analytics

2
Google Analytics
Google Analytics 4

Other

1
AOS (Animate On Scroll)

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Web Servers

1
Apache

Customer Support

1
Zendesk

SEO Analysis

D58/100
16
8
1
Meta Tags5/15
Content10/12
Headings7/8
Technical14/21
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile3/4
Indexability3/3
B
butantan.gov.brbutantan.gov.br

Home - Instituto Butantan

Página Inicial

Title Length25 chars

Recommended: 50-60 chars (~153px / 580px)

Description Length14 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (62/92) — critical for accessibility and SEO

9 issues found

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Local SEO

Local Search Readiness

3/100
Poor
1 14 2

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

F35/100
Bot Access
20/25
Machine Read.
5/25
Schema Data
0/25
Citation
10/25

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
nav
Text ratio:14%
Words:30,533
Token eff.:Excessive
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary
Descriptive Headings
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (10)
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.
D
58/100
10
Passed
3
Critical
2
Warnings
Images & Alt Text
10/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
16/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
5/15
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
1/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
4 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.
30/100
F
2.00 g
CO₂e / view
19.4 MB
Page Weight
5%
Cleaner Than
New Visitor
2.29 g
vs
Returning (cached)
1.14 g
Annual (10K/mo)
240.4 kg
Emission Segments
Data Center
98 mg
Network
589 mg
Device
1.32 g
Resource Breakdown
JavaScript
55.4 KB
Images
8.0 MB
CSS
11.2 MB
Fonts
2.1 KB
HTML
175.4 KB
Green Hosting Verified
Akamai Technologies
Provider Match
6 recommendations
  • •Carbon footprint recommendation preview...
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A+

Security Score

91%Excellent
Interactive

HTTPS

WAF

221d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

07.12.2025

Valid Until

08.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.butantan.gov.brbutantan.gov.br

SHA-256 Fingerprint

80:47:0E:FB:1F:FF:6D:88:69:EF:37:01:E9:F8:FE:B3:23:67:03:C0...

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HTTP Headers

Developer Console

access-control-allow-origin
*
cache-control
🟡 2974s(max-age=2974)
content-encoding
📦 Gzip(gzip)
content-security-policy
frame-ancestors 'none';
content-type
text/html; charset=UTF-8
date
Fri, 01 May 2026 23:34:00 GMT
Good Warning Issue

Email Infrastructure

iCloud Mail

Score

90

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (4)

butantan-mx04.prod.sp.mlicloud.com
butantan-mx02.prod.sp.mlicloud.com
butantan-mx03.prod.ce.mlicloud.com
butantan-mx01.prod.ce.mlicloud.com

Domain Information

butantan.gov.br

Domain Age
28y 2m

Created

09.02.1998

Last Updated

12.05.2021

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

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.
C
66/100
Mobile Friendly8 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, height=device-height, initial-scale=1, maximum-scale=1, user-scalable=0
3 recommendations
  • •Mobile compatibility recommendation preview...
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Typography & Readability

Roboto

WCAG Partial
64/100
Readability
/30
18/30

27px · LH 1.20

Hierarchy
/20
14/20

1.9x ratio

WCAG
/25
12/25

1.19:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

Roboto

Sans51px

Body Font

Roboto

Sans27px

Contrast Ratio

1.19:1

18 issues

Reading Comfort

~36 CPL

Narrow lines
51px
h1
58px
h2
22px
h4
27px
p

✅ Excellent readability: 27px body text is ideal for all devices.

⚠️ Tight line spacing (1.20). Increase to 1.4–1.6 for better readability.

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

⚠️ Partial contrast: 18 elements below WCAG AA threshold (min 1.2:1).

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

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

GGoogle FontsFlesch 0

Color Palette

11 unique colors
9.51:1 AAA Light
#ffffff
Background· 25.400000000000002%
#4b4443
Other· 6.6%
#c1b4ac
Primary· 7%
#191f1d
Secondary· 6.1%
#396d57
Secondary· 5.4%
#b6a39e
Secondary· 5.4%
#749182
Secondary· 4.1%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

1

Categories

1

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

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Scripts & Styles

27 Resources

18
Scripts
9
Styles
4
Async
0
Defer

Top Script Sources

local(5)cdn.jsdelivr.net(3)googletagmanager.com(2)unpkg.com(2)google-analytics.com(1)

Website Identity

butantan.gov.br

28 years old
Location detected: 🇧🇷 Brazilvia tld
📧 iCloud MailPT

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Last analyzed: 01 May 2026 at 23:34

Historical Analysis & Change Tracking