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artofproblemsolving.com

https://artofproblemsolving.com· First analyzed 26 Apr 2026· Updated 26 Apr 2026
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artofproblemsolving.com
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Mobile screenshot of artofproblemsolving.com
Mobile

Sponsored

Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.20.40.144

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

emma.ns.cloudflare.com.ray.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
578 ms10%
Speed Index
751 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
190 KB
60 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Technology Stack

10 Technologies Detected

Analytics

2
Google Analytics
Facebook Pixel

Advertising

2
Microsoft AdvertisingOutbrain

Frameworks

1
React

Libraries

1
jQueryv3.6.0

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Tag Managers

1
Google Tag Manager

CDN

1
Cloudflare

SEO Analysis

D57/100
15
11
0
Meta Tags7/15
Content9/12
Headings4/8
Technical18/25
E-E-A-T0/7
Images2/7
Links5/5
URL5/5
Social3/5
Freshness0/4
Mobile1/4
Indexability3/3
A
artofproblemsolving.comartofproblemsolving.com

Mailing Lists

Stay up to date on all the math happenings by subscribing to the Art of Problem Solving email list.

Title Length13 chars

Recommended: 50-60 chars (~74px / 580px)

Description Length99 chars

Recommended: 120-160 chars

Issues (0)

    11 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    2 URLs

    2 sub-sitemaps

    robots.txt

    64 rules

    Sitemap reference found

    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
    15/25
    Machine Read.
    10/25
    Schema Data
    0/25
    Citation
    11/25

    AI Bot Access

    6/14 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:514
    Token eff.:Optimal
    Sections/1K:1.9

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary15w
    Descriptive Headingsavg 2w
    Canonical URL
    Open Graph3/3
    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.
    D
    52/100
    7
    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
    5/15
    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.
    3 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.
    62/100
    A+
    19 mg
    CO₂e / view
    189.8 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    22 mg
    vs
    Returning (cached)
    11 mg
    Annual (10K/mo)
    2.3 kg
    Emission Segments
    Data Center
    <0.001 g
    Network
    6 mg
    Device
    13 mg
    Resource Breakdown
    Images
    7.4 KB
    CSS
    172.6 KB
    HTML
    9.0 KB
    Other
    900 B
    Green Hosting Verified
    Cloudflare
    Provider Match
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    10%Critical
    Critical / Transactional

    HTTPS

    WAF

    65d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Google Trust Services

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-256

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2+H3

    Valid From

    01.04.2026

    Valid Until

    30.06.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    artofproblemsolving.comtorchboard-multiplayer-server-staging.artofproblemsolving.com

    SHA-256 Fingerprint

    1C:13:FD:5F:D5:9F:E0:0F:DE:CA:7A:80:2E:FE:C5:08:DA:52:6F:D7...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    alt-svc
    h3=":443"; ma=86400
    cf-cache-status
    DYNAMIC
    cf-ray
    9f249e312ac41705-EWR
    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html; charset=UTF-8
    date
    Sun, 26 Apr 2026 09:39:02 GMT
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (7)

    alt1.aspmx.l.google.com
    aspmx4.googlemail.com
    aspmx2.googlemail.com
    aspmx.l.google.com

    +3 more

    Domain Information

    artofproblemsolving.com

    Domain Age
    23y 11m

    Created

    24.05.2002

    Expires

    24.05.2029

    Last Updated

    18.03.2025

    Registrar

    Tucows Domains Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Privacy policy page linked

    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
    66/100
    Mobile Friendly2 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
    initial-scale=1
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Roboto

    WCAG Partial
    68/100
    Readability
    /30
    20/30

    15px · LH 1.43

    Hierarchy
    /20
    17/20

    2x ratio

    WCAG
    /25
    16/25

    3.2:1 min contrast

    Performance
    /25
    15/25

    System fonts

    Heading Font

    Roboto

    Sans30px

    Body Font

    Roboto

    Sans15px

    Contrast Ratio

    3.2:1

    1 issue

    Reading Comfort

    ~42 CPL

    Narrow lines
    30px
    h1
    15px
    p

    ⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

    ✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

    ⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 3.2:1).

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

    ✅ Strong hierarchy: Headlines are 2.0x larger than body text.

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

    Flesch 58

    Color Palette

    8 unique colors
    Light
    #ffffff
    Background· 49%
    #009fad
    Primary· 15.3%
    #173259
    Primary· 6.6%
    #90b7bb
    Secondary· 6%
    #488092
    Primary· 1.9%
    #25a0ac
    Accent· 0.4%

    Business & Marketing Stack

    5 Tools Detected

    Enterprise

    Behavior Analytics

    3
    Google Tag ManagerFree
    MixpanelMid-Market
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    2
    Facebook PixelMid-Market
    Microsoft AdsEnterprise

    Ad platforms and retargeting pixels

    2

    Categories

    5

    Total Tools

    1

    Enterprise

    2

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    25 Resources

    19
    Scripts
    6
    Styles
    11
    Async
    0
    Defer

    Top Script Sources

    local(9)bat.bing.com(2)connect.facebook.net(2)wave.outbrain.com(1)amplify.outbrain.com(1)

    Website Identity

    artofproblemsolving.com

    23 years old
    Location detected: 🇨🇦 Canadavia ip
    Tucows Domains Inc.📧 Google Workspaceen

    Sponsored

    Last analyzed: 26 Apr 2026 at 09:39

    Historical Analysis & Change Tracking