Back to Search
combustioninstitute.org favicon

combustioninstitute.org

https://combustioninstitute.org· First analyzed 03 Jun 2026· Updated 03 Jun 2026
Export
combustioninstitute.org
Desktop screenshot of combustioninstitute.org
Mobile screenshot of combustioninstitute.org
Mobile

Sponsored

Hosting Provider

SourceDNS

IP Address

67.227.157.109

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Lansing, United States

ASN

AS32244

Organization

SourceDNS

Server

Apache

Nameservers

ns17.viethwebhosting.com.ns18.viethwebhosting.com.

Performance

73

Core Web Vitals

Weight

First Contentful Paint
7.4 s10%
Speed Index
9.6 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
416 KB
19 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
SourceDNS

Technology Stack

6 Technologies Detected

Libraries

2
jQueryv3.7.1
jQuery UI

CSS Frameworks

2
Bootstrap
Tailwind CSS

Fonts

1
Google Fonts

Web Servers

1
Apache

SEO Analysis

D46/100
11
12
2
Meta Tags7/15
Content11/12
Headings3/8
Technical13/25
E-E-A-T0/7
Images1/7
Links2/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
C
combustioninstitute.orgcombustioninstitute.org

Home - The Combustion Institute

No description available for this page.

Title Length31 chars

Recommended: 50-60 chars (~191px / 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 (11/15) — critical for accessibility and SEO

14 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

8 rules

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.

Sponsored

AI & LLM Readiness

F36/100
Bot Access
20/25
Machine Read.
12/25
Schema Data
0/25
Citation
4/25

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
blockquotesheader/footer
Text ratio:13%
Words:906
Token eff.:Optimal
Sections/1K:2.2
Depth:2/5

Structured Data

No Schema

Citation Readiness

Opening Summary252w
Descriptive Headingsavg 2w
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...
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.
B
70/100
7
Passed
3
Critical
1
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
15/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
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.
2 recommendations
  • •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.
55/100
A
51 mg
CO₂e / view
415.9 KB
Page Weight
90%
Cleaner Than
New Visitor
59 mg
vs
Returning (cached)
29 mg
Annual (10K/mo)
6.2 kg
Emission Segments
Data Center
12 mg
Network
12 mg
Device
28 mg
Resource Breakdown
JavaScript
126.4 KB
Images
238.9 KB
CSS
39.8 KB
Fonts
1005 B
HTML
9.9 KB
Green Hosting Not Verified
SourceDNS
4 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

75d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

19.05.2026

Valid Until

17.08.2026

Subject Alternative Names (2)

*.combustioninstitute.orgcombustioninstitute.org

SHA-256 Fingerprint

90:93:75:D9:2D:39:66:51:74:98:B1:5E:FD:5B:CC:48:21:73:C2:41...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations
Upgrade to view header details

HTTP Headers

Developer Console

content-encoding
⚡ Brotli(br)
content-length
9808
content-type
text/html; charset=UTF-8
date
Wed, 03 Jun 2026 12:24:12 GMT
server
Apache
vary
Accept-Encoding
Good Warning Issue

Email Infrastructure

Barracuda

Score

90

SPF
DKIM
DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

d297352a.ess.barracudanetworks.com
d297352b.ess.barracudanetworks.com

Domain Information

combustioninstitute.org

Domain Age
26y 6m

Created

02.12.1999

Expires

02.12.2026

Last Updated

16.01.2026

Registrar

GoDaddy.com, 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.
C
64/100
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=1.0
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Inter

WCAG Partial
72/100
Readability
/30
22/30

16px · LH 2.00

Hierarchy
/20
14/20

3x ratio

WCAG
/25
16/25

1:1 min contrast

Performance
/25
20/25

1 font · 1 req

Heading Font

Inter

Sans48px

Body Font

Inter

Sans16px

Contrast Ratio

1:1

27 issues

Reading Comfort

~39 CPL

Narrow lines
48px
h1
24px
h3
18px
h4
16px
p

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

⚠️ Wide line spacing (2.00). 1.4–1.6 is optimal for body text.

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

⚠️ Partial contrast: 27 elements below WCAG AA threshold (min 1.0:1).

⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

GGoogle FontsFlesch 27

Color Palette

6 unique colors
2.32:1 Fail Light
#ffffff
Background· 82.8%
#adaaa4
Other· 3.5%
#e5e6ea
Primary· 7.999999999999999%
#c8c2b5
Secondary· 2.5%
#97805b
Secondary· 1.6%
#dedbd3
Secondary· 1.6%

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Social Media

1
Twitter/X WidgetsFree

Social widgets and sharing tools

2

Categories

2

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Growing marketing technology adoption

Sponsored

Scripts & Styles

17 Resources

8
Scripts
9
Styles
0
Async
0
Defer

Top Script Sources

combustioninstitute.org(8)

Website Identity

combustioninstitute.org

26 years old
Location detected: 🇺🇸 United Statesvia ip
GoDaddy.com, LLC📧 Barracudaen

Sponsored

Last analyzed: 03 Jun 2026 at 12:24

Historical Analysis & Change Tracking