back4blood.com

https://back4blood.com· First analyzed 19 May 2026· Updated 19 May 2026

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back4blood.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

3.164.206.40

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Nginx

CDN

CloudFront

Nameservers

ns-14.awsdns-01.com.ns-1696.awsdns-20.co.uk.ns-522.awsdns-01.net.ns-1207.awsdns-22.org.

Performance

Core Web Vitals

Weight

First Contentful Paint

692 ms10%

Speed Index

900 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

631 KB

82 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Contentful

Infrastructure

Platform

AWS CloudFront

CDN

CloudFront

Progressive Web App

Web ManifestApple Touch IconTheme Color

Detected API Sources

https://images.ctfassets.net/n...https://images.ctfassets.net/n...

Technology Stack

8 Technologies Detected

Fonts

Adobe Fonts (Typekit)Adobe Fonts

Analytics

CSS Frameworks

Icon Libraries

Tag Managers

Web Servers

SEO Analysis

D53/100

Meta Tags7/15

Content10/12

Headings3/8

Technical13/25

E-E-A-T0/7

Images3/7

Links2/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability3/3

back4blood.comback4blood.com

Back 4 Blood

Back 4 Blood is a thrilling cooperative first-person shooter from the creators of the critically acclaimed Left 4 Dead franchise. You are at the center of a ...

Description truncated.

Title Length12 chars

Recommended: 50-60 chars (~72px / 580px)

Description Length459 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

12 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

4/100

Poor

1 15 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

D40/100

Bot Access

20/25

Machine Read.

10/25

Schema Data

0/25

Citation

10/25

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:3%

Words:561

Token eff.:Optimal

Sections/1K:8.9

Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary143w

Descriptive Headingsavg 3.3w

Canonical URL

Open Graph3/3

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.

61/100

Passed

Critical

Warnings

Images & Alt Text

8/20

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

Semantic Structure

13/20

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

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

2/15

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

5 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.

59/100

64 mg

CO₂e / view

631.4 KB

Page Weight

80%

Cleaner Than

New Visitor

73 mg

Returning (cached)

36 mg

Annual (10K/mo)

7.7 kg

Emission Segments

Data Center

3 mg

Network

19 mg

Device

42 mg

Resource Breakdown

JavaScript

485.4 KB

Images

2.6 KB

CSS

53.7 KB

HTML

77.3 KB

Other

12.5 KB

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

21%Critical

Interactive

HTTPS

No WAF

76d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.07.2025

Valid Until

03.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

back4blood.com*.back4blood.com

SHA-256 Fingerprint

04:78:85:6E:B4:F3:FE:5E:B0:3C:EB:63:29:13:62:49:B6:5F:B4:0A...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, private)

content-type

text/html; charset=UTF-8

date

Tue, 19 May 2026 20:17:33 GMT

server

nginx/1.20.0

via

1.1 5faef5896535c10b8fb4eb0cee973056.cloudfront.net (CloudFr...

x-amz-cf-id

Jg0E8j5WlAwhTiAxThEK703e7yzGIFeyo5NoNWB6liM1eh7glqQEEw==

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

back4blood.com

Domain Age

7y 3m

Created

06.02.2019

Expires

06.02.2027

Last Updated

05.02.2026

Registrar

Tucows Domains Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

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.

78/100

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

san-serif + -apple-system

WCAG Partial

59/100

Readability

/30

25/30

16px · LH 1.40

Hierarchy

/20

6/20

WCAG

/25

13/25

1:1 min contrast

Performance

/25

15/25

System fonts

Heading Font

san-serif

Serif

Body Font

-apple-system

Sans16px

Contrast Ratio

1:1

19 issues

Reading Comfort

~56 CPL

Optimal (45–75)

64px

61px

24px

16px

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

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~56 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 19 elements below WCAG AA threshold (min 1.0:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

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

AAdobe Fonts Buy on MyFonts

Color Palette

10 unique colors

Dark

#000000

Background· 24.299999999999997%

#031932

Accent· 17.799999999999997%

#ffffff

Primary· 0%

#04284c

Accent· 12.4%

#1b0914

Secondary· 11.7%

#044785

Accent· 8.9%

#53a2da

Accent· 6.2%

#720615

Accent· 5.6%

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(2)cdn.jsdelivr.net(2)local(2)cdn.cookielaw.org(2)platform.twitter.com(1)

Website Identity

back4blood.com

7 years old

Location detected: 🇫🇮 Finlandvia ip

Tucows Domains Inc.en-GB

Social Profiles

Facebook X (Twitter)Instagram Discord

Sponsored

Last analyzed: 19 May 2026 at 20:18

Historical Analysis & Change Tracking