cryptography.io

https://cryptography.io· First analyzed 05 May 2026· Updated 05 May 2026

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cryptography.io

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.16.253.120

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

brit.ns.cloudflare.com.boyd.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

653 ms10%

Speed Index

849 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

715 KB

23 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Technology Stack

4 Technologies Detected

Libraries

CSS Frameworks

Icon Libraries

CDN

SEO Analysis

C64/100

Meta Tags7/15

Content11/12

Headings8/8

Technical18/25

E-E-A-T3/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

cryptography.iocryptography.io

Welcome to pyca/cryptography — Cryptography 49.0.0.dev1 documentation

No description available for this page.

Title Length69 chars

Recommended: 50-60 chars (~423px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description — important for click-through rates in SERPs
• Most images missing alt text (1/1) — critical for accessibility and SEO

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

88 URLs

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

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.

Sponsored

AI & LLM Readiness

D41/100

Bot Access

20/25

Machine Read.

14/25

Schema Data

1/25

Citation

6/25

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

code blocksnav

Text ratio:10%

Words:1,278

Token eff.:Optimal

Sections/1K:1.6

Depth:2/5

Structured Data

Microdata

Article×1.2(min)microdata

Citation Readiness

Opening Summary36w

Descriptive Headingsavg 1w

Canonical URL

Open Graph0/3

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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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.

66/100

Passed

Critical

Warnings

Images & Alt Text

5/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

18/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

12/15

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

7/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

3 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.

71/100

72 mg

CO₂e / view

715.4 KB

Page Weight

80%

Cleaner Than

New Visitor

83 mg

Returning (cached)

41 mg

Annual (10K/mo)

8.7 kg

Emission Segments

Data Center

4 mg

Network

21 mg

Device

48 mg

Resource Breakdown

JavaScript

174.5 KB

CSS

527.4 KB

HTML

7.5 KB

Other

6.1 KB

Green Hosting Verified

Cloudflare

GWF Verified

1 recommendation

•Carbon footprint recommendation preview...

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Security Score

59%Poor

Interactive

HTTPS

WAF

80d

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+H3

Valid From

25.04.2026

Valid Until

24.07.2026

Subject Alternative Names (1)

cryptography.io

SHA-256 Fingerprint

F9:D9:2D:B6:48:B2:33:BE:A6:5D:2E:16:73:78:A7:A7:15:7E:43:06...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-methods

HEAD, OPTIONS, GET

access-control-allow-origin

alt-svc

h3=":443"; ma=86400

cache-control

🟡 1200s(max-age=1200)

cdn-cache-control

public

cf-cache-status

HIT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt1.aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx.l.google.com

aspmx2.googlemail.com

+1 more

Domain Information

cryptography.io

Domain Age

12y 9m

Created

07.08.2013

Expires

07.08.2029

Last Updated

25.12.2024

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

69/100

Mobile Friendly7 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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Roboto Slab + Lato

WCAG Partial

68/100

Readability

/30

23/30

16px · LH 1.50

Hierarchy

/20

17/20

1.75x ratio · ✓ H1→H6

WCAG

/25

17/25

4.19:1 min contrast

Performance

/25

11/25

2 fonts · 4 req

Heading Font

Roboto Slab

Sans28px

Body Font

Lato

Sans16px

Contrast Ratio

4.19:1

3 issues

Reading Comfort

~37 CPL

Narrow lines

28px

24px

16px

✅ 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 34/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 3 elements below WCAG AA threshold (min 4.2:1).

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

✅ Lean font stack: 2 font families keeps load times fast.

Buy on MyFontsFlesch 34

Color Palette

7 unique colors

12.48:1 AAA Light

#fcfcfc

Background· 41.6%

#333230

Other· 16.2%

#ecfecc

Primary· 13.9%

#486e87

Secondary· 7.3%

#ced7cc

Text· 5.8%

#f4deda

Accent· 0.5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

_static(8)local(1)media.ethicalads.io(1)server.ethicalads.io(1)

Website Identity

cryptography.io

12 years old

Location detected: 🇨🇦 Canadavia ip

NameCheap, Inc.📧 Google Workspaceen

Social Profiles

GitHub

Sponsored

Last analyzed: 05 May 2026 at 03:28

Historical Analysis & Change Tracking