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koppers.com

https://koppers.com· First analyzed 08 Sept 2026· Updated 08 Sept 2026
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koppers.com
Desktop screenshot of koppers.com
Mobile screenshot of koppers.com
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

75.2.60.5

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Seattle, United States

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

Netlify

Nameservers

ns77.worldnic.com.ns78.worldnic.com.

Performance

84

Core Web Vitals

Weight

First Contentful Paint
1.9 s10%
Speed Index
2.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
541 KB
51 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

JAMstack
⚡ SSG
Decoupled
Frontend
Framework
Next.js
API
Data Source
Headless CMS
Sanity
Infrastructure
Platform
Netlify

Detected API Sources

https://cdn.sanity.io/images/o...https://cdn.sanity.io/images/o...

Technology Stack

7 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Meta Frameworks

1
Next.js

CSS Frameworks

1
Tailwind CSS

Fonts

1
Adobe Fonts (Typekit)

Tag Managers

1
Google Tag Manager

Platforms

1
Netlify

SEO Analysis

C61/100
16
10
0
Meta Tags9/15
Content10/12
Headings6/8
Technical13/21
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile4/4
Indexability3/3
K
koppers.comkoppers.com

Koppers Inc.

We provide fully integrated, sustainability-based product, services, and solutions to infrastructure industries around the world.

Title Length12 chars

Recommended: 50-60 chars (~70px / 580px)

Description Length129 chars

Recommended: 120-160 chars

Issues (0)

    10 issues found

    Upgrade to view details

    Local SEO

    Local Search Readiness

    22/100
    Needs Work
    7 9 2

    Sponsored

    AI & LLM Readiness

    D40/100
    Bot Access
    20/25
    Machine Read.
    7/25
    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.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:2%
    Words:1,199
    Token eff.:Optimal

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary17w
    Descriptive Headingsavg 6w
    Canonical URL
    Open Graph2/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    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.
    C
    63/100
    9
    Passed
    5
    Critical
    1
    Warnings
    Images & Alt Text
    10/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    12/20
    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
    0/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    3 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.
    75/100
    A
    55 mg
    CO₂e / view
    540.7 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    62 mg
    vs
    Returning (cached)
    31 mg
    Annual (10K/mo)
    6.6 kg
    Emission Segments
    Data Center
    3 mg
    Network
    16 mg
    Device
    36 mg
    Resource Breakdown
    JavaScript
    230.9 KB
    CSS
    96.3 KB
    HTML
    60.9 KB
    Other
    152.6 KB
    Green Hosting Verified
    Amazon Web Services (AWS)
    Provider Match
    2 recommendations
    • •Carbon footprint recommendation preview...
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    F

    Security Score

    36%Critical
    Interactive

    HTTPS

    No WAF

    57d

    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

    07.08.2026

    Valid Until

    05.11.2026

    Subject Alternative Names (2)

    koppers.comwww.koppers.com

    SHA-256 Fingerprint

    25:E2:29:30:3E:A8:63:86:C9:C8:76:4B:46:A9:F3:BF:E4:51:7D:AC...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    age
    0
    cache-control
    🟡 0s(public,max-age=0,must-revalidate)
    cache-status
    "Netlify Edge"; fwd=miss; fwd-status=200; stored
    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html; charset=UTF-8
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    95

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (2)

    mxa-0015f402.gslb.pphosted.com
    mxb-0015f402.gslb.pphosted.com

    Domain Information

    koppers.com

    Domain Age
    30y 10m

    Created

    10.11.1995

    Expires

    09.11.2030

    Last Updated

    10.09.2025

    Registrar

    Network Solutions, LLC

    DNSSEC
    Not Enabled

    Privacy & Compliance

    OneTrust

    Cookie Consent Banner
    OneTrust
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: OneTrust
    Privacy policy page linked
    Data Protection Officer mentioned

    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 Friendly17 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
    1 recommendation
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    azo-sans-web + proxima-nova

    WCAG Partial
    69/100
    Readability
    /30
    25/30

    18px · LH 1.44

    Hierarchy
    /20
    17/20

    2.44x ratio

    WCAG
    /25
    15/25

    1:1 min contrast

    Performance
    /25
    12/25

    3 fonts

    Heading Font

    azo-sans-web

    Sans44px

    Body Font

    proxima-nova

    Sans18px

    Contrast Ratio

    1:1

    8 issues

    Reading Comfort

    ~35 CPL

    Narrow lines
    44px
    h1
    18px
    h2
    14px
    h3
    14px
    h4
    18px
    p

    ✅ Excellent readability: 18px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.44 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 29/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.0:1).

    ⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

    ✅ Strong hierarchy: Headlines are 2.4x larger than body text.

    AAdobe FontsBuy on MyFontsFlesch 29

    Color Palette

    14 unique colors
    Light
    #ffffff
    Background· 23.2%
    #1e3f20
    Primary· 7.2%
    #336134
    Secondary· 7.2%
    #73ad58
    Secondary· 7%
    #0b170f
    Secondary· 6.8%
    #61814a
    Secondary· 6.2%
    #a5bf79
    Secondary· 5.9%
    #fed688
    Accent· 5.6%

    Business & Marketing Stack

    3 Tools Detected

    Advanced

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Privacy & Cookies

    1
    OneTrustEnterprise

    Cookie consent and privacy compliance tools

    2

    Categories

    3

    Total Tools

    1

    Enterprise

    0

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    20 Resources

    20
    Scripts
    0
    Styles
    1
    Async
    15
    Defer

    Top Script Sources

    local(17)cookie-cdn.cookiepro.com(3)

    Website Identity

    koppers.com

    undefined
    30 years old
    Location detected: 🇺🇸 United Statesvia ip
    Network Solutions, LLCen

    Sponsored

    Last analyzed: 08 Sept 2026 at 19:52

    Historical Analysis & Change Tracking