keylength.com

https://keylength.com· First analyzed 31 May 2026· Updated 31 May 2026

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keylength.com

Mobile

Sponsored

Hosting Provider

Nucleus Bvba

IP Address

77.73.103.108

Site Location

🇧🇪 Belgiumvia ip

Server Location

🇧🇪 Antwerp, Belgium

ASN

AS34762

Organization

Nucleus Bvba

Server

Apache

Nameservers

dns101.ovh.net.ns101.ovh.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

921 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

57 KB

21 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Nucleus Bvba

Technology Stack

2 Technologies Detected

Libraries

jQuery

Web Servers

Apache

SEO Analysis

D55/100

Meta Tags14/15

Content10/12

Headings0/8

Technical13/25

E-E-A-T3/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

keylength.comkeylength.com

Keylength - Cryptographic Key Length Recommendation

Easily find the minimum cryptographic key length recommended by different scientific reports and governments.

Title Length51 chars

Recommended: 50-60 chars (~315px / 580px)

Description Length109 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (17/22) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

11 issues found

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Crawlability

Sitemap

Type: standard

21 URLs

robots.txt

8 rules

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

F30/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

0/25

Citation

9/25

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

Text ratio:8%

Words:222

Token eff.:Too Short

Sections/1K:4.5

Structured Data

No Schema

Citation Readiness

Opening Summary125w

Descriptive Headings

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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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.

60/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

7/20

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

12/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

5/15

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.

2 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.

70/100

A+

6 mg

CO₂e / view

56.6 KB

Page Weight

95%

Cleaner Than

New Visitor

7 mg

Returning (cached)

3 mg

Annual (10K/mo)

684 g

Emission Segments

Data Center

<0.001 g

Network

2 mg

Device

4 mg

Resource Breakdown

JavaScript

29.6 KB

Images

22.3 KB

CSS

842 B

HTML

3.9 KB

Green Hosting Verified

Combell

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

86%Very Good

Interactive

HTTPS

No WAF

41d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (3072 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

13.04.2026

Valid Until

12.07.2026

Subject Alternative Names (16)

keylength.bekeylength.bizkeylength.comkeylength.eukeylength.frkeylength.infokeylength.netkeylength.org+8 more

SHA-256 Fingerprint

CA:B5:90:61:E9:13:B9:6C:DE:80:7B:63:D9:4C:7C:F0:B6:BF:75:B4...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection

Keep-Alive

content-encoding

📦 Gzip(gzip)

content-length

3669

content-security-policy

default-src blob: 'self' 'unsafe-inline' 'unsafe-eval'

content-type

text/html; charset=UTF-8

date

Sun, 31 May 2026 16:27:25 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

Domain Information

keylength.com

Domain Age

21y 10m

Created

30.07.2004

Expires

30.07.2026

Last Updated

15.12.2025

Registrar

OVH sas

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.

27/100

Not 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.

5 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica

WCAG Partial

49/100

Readability

/30

10/30

13px · LH --

Hierarchy

/20

6/20

WCAG

/25

19/25

2.7:1 min contrast

Performance

/25

14/25

1 font

Heading Font

Helvetica

Sans

Body Font

Helvetica

Sans13px

Contrast Ratio

2.7:1

2 issues

Reading Comfort

~120 CPL

Too wide

14px

13px

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

❌ Very long lines: ~120 chars/line causes eye strain. Add max-width constraint.

❌ Very complex text: Flesch score 27/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 2.7:1).

⚠️ Text justify detected: Justified text creates uneven word spacing, hurting readability on web.

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 27

Color Palette

10 unique colors

2.69:1 Fail Light

#ffffff

Background· 85.1%

#a09d9e

Other· 3.4%

#317db1

Primary· 2.3%

#d6e4e9

Secondary· 2.1%

#f0efe7

Secondary· 1.4%

#87bcd4

Secondary· 1.1%

#c2bfb5

Secondary· 1.1%

#5d91b1

Secondary· 0.3%

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Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(3)

Website Identity

keylength.com

21 years old

Location detected: 🇧🇪 Belgiumvia ip

OVH sasen

Sponsored

Last analyzed: 31 May 2026 at 16:27

Historical Analysis & Change Tracking