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grapheneos.org

https://grapheneos.org· First analyzed 26 Apr 2026· Updated 26 Apr 2026
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grapheneos.org
Desktop screenshot of grapheneos.org
Mobile screenshot of grapheneos.org
Mobile

Sponsored

Hosting Provider

Netcup KVM

IP Address

159.195.46.80

Site Location

🇩🇪 Germanyvia ip

Server Location

🇩🇪 Nuremberg, Germany

ASN

AS197540

Organization

Netcup KVM

Server

Nginx

Nameservers

ns1.grapheneos.org.ns2.grapheneos.org.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
559 ms10%
Speed Index
727 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
40 KB
8 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Netcup KVM

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

1 Technologies Detected

Web Servers

1
Nginx

SEO Analysis

C68/100
20
5
1
Meta Tags12/15
Content9/12
Headings8/8
Technical18/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile4/4
Indexability3/3
G
grapheneos.orggrapheneos.org

GrapheneOS: the private and secure mobile OS

GrapheneOS is a security and privacy focused mobile OS with Android app compatibility.

Title Length44 chars

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

Description Length86 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (4/4) — critical for accessibility and SEO

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

28 URLs

robots.txt

2 rules

Sitemap reference found

Allows all crawlers

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.

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AI & LLM Readiness

D47/100
Bot Access
20/25
Machine Read.
16/25
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
navheader/footer
Text ratio:43%
Words:468
Token eff.:Optimal
Sections/1K:6.4
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary18w
Descriptive Headingsavg 2.7w
Canonical URL
Open Graph3/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
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.
A
80/100
11
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
20/20
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
1/15
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.
63/100
A+
5 mg
CO₂e / view
39.9 KB
Page Weight
95%
Cleaner Than
New Visitor
6 mg
vs
Returning (cached)
3 mg
Annual (10K/mo)
588 g
Emission Segments
Data Center
1 mg
Network
1 mg
Device
3 mg
Resource Breakdown
JavaScript
1.3 KB
Images
2.7 KB
CSS
2.2 KB
Fonts
31.4 KB
HTML
2.3 KB
Green Hosting Not Verified
Netcup KVM
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
A+

Security Score

100%Excellent
Static / Informational

HTTPS

No WAF

4d

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

24.04.2026

Valid Until

30.04.2026

Subject Alternative Names (20)

grapheneos.appgrapheneos.cagrapheneos.comgrapheneos.devgrapheneos.foundationgrapheneos.infographeneos.netgrapheneos.org+12 more

SHA-256 Fingerprint

79:9D:2A:0C:F3:75:55:F8:47:E5:2C:A5:B4:2E:CA:DA:17:B2:29:E0...

Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🔴 No Cache(public, no-cache)
content-encoding
⚡ Brotli(br)
content-length
2039
content-security-policy
default-src 'none'; connect-src 'self' https://releases.grap...
content-type
text/html; charset=utf-8
cross-origin-embedder-policy
require-corp
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mail.grapheneos.org
mail.grapheneos.net

Domain Information

grapheneos.org

Domain Age
7y 1m

Created

23.03.2019

Expires

23.03.2029

Last Updated

22.06.2023

Registrar

Porkbun 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.
D
58/100
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,viewport-fit=cover
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Roboto

WCAG Partial
78/100
Readability
/30
23/30

16px · LH 1.50

Hierarchy
/20
18/20

2.25x ratio · ✓ H1→H6

WCAG
/25
17/25

1.3:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

Roboto

Sans36px

Body Font

Roboto

Sans16px

Contrast Ratio

1.3:1

12 issues

Reading Comfort

~39 CPL

Narrow lines
36px
h1
24px
h2
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 30/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 12 elements below WCAG AA threshold (min 1.3:1).

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

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

Flesch 30

Color Palette

5 unique colors
17.65:1 AAA Light
#fafafa
Background· 86.30000000000001%
#141414
Text· 1.2%
#788794
Primary· 2.6%

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Scripts & Styles

2 Resources

1
Scripts
1
Styles
0
Async
0
Defer

Top Script Sources

local(1)

Website Identity

grapheneos.org

7 years old
Location detected: 🇩🇪 Germanyvia ip
Porkbun LLCen

Sponsored

Last analyzed: 26 Apr 2026 at 16:18

Historical Analysis & Change Tracking