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cyfrin.io

https://cyfrin.io· First analyzed 22 May 2026· Updated 22 May 2026
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cyfrin.io
Desktop screenshot of cyfrin.io
Mobile screenshot of cyfrin.io
Mobile

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Hosting Provider

Webflow
webflow.com

IP Address

198.202.211.1

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS209242

Organization

Webflow, Inc

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

jakub.ns.cloudflare.com.meiling.ns.cloudflare.com.

Performance

96

Core Web Vitals

Weight

First Contentful Paint
1.1 s10%
Speed Index
1.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
254 KB
67 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Webflow
CDN
Cloudflare

Technology Stack

7 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv3.5.1

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Advertising

1
Twitter Ads

CDN

1
Cloudflare

SEO Analysis

C65/100
20
7
1
Meta Tags8/15
Content8/12
Headings7/8
Technical15/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
C
cyfrin.iocyfrin.io

Blockchain Security, Smart Contract Audits, Developer Education - C...

Cyfrin is a Blockchain Security Platform. We make protocols safer with leading Smart Contract Security Audits, Blockchain Developer Courses, and Security Res...

Title truncated. Description truncated.
Title Length72 chars

Recommended: 50-60 chars (~429px / 580px)

Description Length163 chars

Recommended: 120-160 chars

Issues (1)

  • • Title is too long (72 chars, ~429px). Will be truncated in search results.

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

494 URLs

robots.txt

4 rules

Sitemap reference found

Local SEO

Local Search Readiness

6/100
Poor
2 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
20/25
Machine Read.
11/25
Schema Data
0/25
Citation
11/25

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:6%
Words:2,233
Token eff.:Optimal
Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary1022w
Descriptive Headingsavg 6.7w
Canonical URL
Open Graph3/3
Twitter Card3/3
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.
B
72/100
10
Passed
5
Critical
0
Warnings
Images & Alt Text
13/20
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
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
3/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
2 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

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.
76/100
A+
26 mg
CO₂e / view
253.7 KB
Page Weight
95%
Cleaner Than
New Visitor
29 mg
vs
Returning (cached)
15 mg
Annual (10K/mo)
3.1 kg
Emission Segments
Data Center
1 mg
Network
8 mg
Device
17 mg
Resource Breakdown
JavaScript
191.0 KB
Fonts
1.0 KB
HTML
61.6 KB
Green Hosting Verified
Cloudflare
GWF Verified
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
D

Security Score

41%Poor
Interactive

HTTPS

WAF

42d

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+H3

Valid From

05.04.2026

Valid Until

04.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.cyfrin.io

SHA-256 Fingerprint

87:DD:C4:90:BB:EF:0B:39:CE:0E:2C:59:EE:B4:E0:7A:7F:9A:85:1C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=86400
cf-cache-status
HIT
cf-ray🇦🇹 Vienna
9ffebeb8d9c05b0c-VIE
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Fri, 22 May 2026 20:59:30 GMT
Good Warning Issue

Email Infrastructure

Google Workspace

Score

90

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

aspmx.l.google.com
alt3.aspmx.l.google.com
alt4.aspmx.l.google.com
alt1.aspmx.l.google.com

+1 more

Domain Information

cyfrin.io

Domain Age
3y 6m

Created

16.11.2022

Expires

16.11.2031

Last Updated

31.01.2026

Registrar

Key-Systems GmbH

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.
B
70/100
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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Satoshi + Inter

WCAG Partial
76/100
Readability
/30
25/30

16px · LH 1.50

Hierarchy
/20
18/20

3.75x ratio · ✓ H1→H6

WCAG
/25
17/25

3:1 min contrast

Performance
/25
16/25

System fonts

Heading Font

Satoshi

Sans60px

Body Font

Inter

Sans16px

Contrast Ratio

3:1

1 issue

Reading Comfort

Dual Sans-Serif

left aligned
60px
h1
36px
h2
14px
h4
16px
p

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

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

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

⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.0:1).

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

✅ Strong hierarchy: Headlines are 3.8x larger than body text.

GGoogle FontsBuy on MyFontsFlesch 32

Color Palette

8 unique colors
2.65:1 Fail Light
#ffffff
Background· 82.5%
#a39da7
Other· 2.1%
#4a7cdc
Primary· 5%
#453d61
Secondary· 3.8%
#c1c9d4
Secondary· 2.6%
#d02a72
Accent· 2.3%
#eadaae
Accent· 0.9%
#1042a5
Accent· 0.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Advertising

1
Twitter/X AdsMid-Market

Ad platforms and retargeting pixels

2

Categories

2

Total Tools

0

Enterprise

1

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

12 Resources

10
Scripts
2
Styles
4
Async
0
Defer

Top Script Sources

cdn.prod.website-files.com(3)googletagmanager.com(1)static.ads-twitter.com(1)ajax.googleapis.com(1)local(1)

Website Identity

cyfrin.io

3 years old
Location detected: 🇺🇸 United Statesvia ip
Key-Systems GmbH📧 Google Workspaceen

Sponsored

Last analyzed: 22 May 2026 at 20:59

Historical Analysis & Change Tracking