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libsodium.org

https://libsodium.org· First analyzed 12 May 2026· Updated 12 May 2026
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libsodium.org
Desktop screenshot of libsodium.org
Mobile screenshot of libsodium.org
Mobile

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Hosting Provider

OVHcloud
ovhcloud.com

IP Address

37.59.238.213

Site Location

🇫🇷 Francevia ip

Server Location

🇫🇷 Roubaix, France

ASN

AS16276

Organization

Denis Frank

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

free.ns.c9x.org.recital.ns.c9x.org.

Performance

88

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%
551 KB
70 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Hybrid
🔀 Hybrid
Frontend
Framework
Next.js
Styling
Tailwind CSS
Infrastructure
Hosting
OVHcloud
CDN
Cloudflare

Technology Stack

4 Technologies Detected

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

CDN

1
Cloudflare

SEO Analysis

C68/100
21
6
2
Meta Tags7/15
Content8/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images3/7
Links5/5
URL5/5
Social4/5
Freshness2/4
Mobile4/4
Indexability3/3
L
libsodium.orglibsodium.org

Introduction | Libsodium documentation

No description available for this page.

Title Length38 chars

Recommended: 50-60 chars (~228px / 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 (4/4) — critical for accessibility and SEO

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

1 sub-sitemaps

robots.txt

9 rules

Sitemap reference found

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

D51/100
Bot Access
20/25
Machine Read.
18/25
Schema Data
0/25
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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:1%
Words:416
Token eff.:Optimal
Sections/1K:2.4

Structured Data

No Schema

Citation Readiness

Opening Summary15w
Descriptive Headingsavg 1.5w
Canonical URL
Open Graph2/3
Twitter Card2/3
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.
A
88/100
15
Passed
1
Critical
0
Warnings
Images & Alt Text
20/20
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
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
11/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
9/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
1 recommendation
  • •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.
74/100
A
56 mg
CO₂e / view
550.5 KB
Page Weight
80%
Cleaner Than
New Visitor
64 mg
vs
Returning (cached)
32 mg
Annual (10K/mo)
6.7 kg
Emission Segments
Data Center
3 mg
Network
16 mg
Device
37 mg
Resource Breakdown
HTML
30.8 KB
Other
519.7 KB
Green Hosting Verified
OVHcloud
GWF Verified
2 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

76%Good
Interactive

HTTPS

WAF

38d

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

21.03.2026

Valid Until

19.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

gitbook.io*.gitbook.io

SHA-256 Fingerprint

E4:C8:8E:DD:4D:AF:02:E9:0C:07:84:4A:BF:2A:E5:1F:F5:C2:E9:F0...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc
h3=":443"; ma=86400
cache-control
⚪ Custom(s-maxage=57765, stale-while-revalidate=2592000)
cf-ray
9fa5589be8dcf64e-SJC
content-encoding
⚡ Brotli(br)
content-security-policy
default-src 'self' *; script-src 'self' 'unsafe-inline' 'uns...
content-type
text/html; charset=utf-8
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

98

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

premiere.mx.c9x.org

Domain Information

libsodium.org

Domain Age
12y 10m

Created

26.06.2013

Expires

26.06.2027

Last Updated

11.11.2024

Registrar

OVH sas

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected

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
71/100
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, maximum-scale=1, viewport-fit=cover
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

arial

WCAG Partial
80/100
Readability
/30
22/30

16px · LH 1.63

Hierarchy
/20
19/20

2.25x ratio · ✓ H1→H6

WCAG
/25
17/25

3.71:1 min contrast

Performance
/25
22/25

System fonts

Heading Font

arial

Sans36px

Body Font

arial

Sans16px

Contrast Ratio

3.71:1

9 issues

Reading Comfort

~38 CPL

Narrow lines
36px
h1
30px
h2
16px
p

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

⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 9 elements below WCAG AA threshold (min 3.7:1).

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

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

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

Flesch 42

Color Palette

5 unique colors
2.88:1 Fail Light
#ffffff
Background· 89%
#999897
Other· 2.3%

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

16 Resources

8
Scripts
8
Styles
7
Async
0
Defer

Top Script Sources

static-2c.gitbook.com(8)

Website Identity

libsodium.org

12 years old
Location detected: 🇫🇷 Francevia ip
OVH sasen

Social Profiles

GitHub

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Last analyzed: 12 May 2026 at 00:36

Historical Analysis & Change Tracking