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oi-wiki.org

https://oi-wiki.org· First analyzed 17 May 2026· Updated 17 May 2026
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oi-wiki.org
Desktop screenshot of oi-wiki.org
Mobile screenshot of oi-wiki.org
Mobile

Sponsored

Hosting Provider

DMIT Cloud Services

IP Address

154.17.2.113

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Los Angeles, United States

ASN

AS906

Server

Nginx

Nameservers

f1g1ns2.dnspod.net.f1g1ns1.dnspod.net.

Performance

91

Core Web Vitals

Weight

First Contentful Paint
1.4 s10%
Speed Index
1.8 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.1 MB
35 requests

Image Optimization

WebP
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
DMIT Cloud Services

Progressive Web App

Service WorkerTheme Color

Technology Stack

6 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Google Tag Manager

CSS Frameworks

1
Tailwind CSS

Fonts

1
Google Fonts

Web Servers

1
Nginxv1.30.1

SEO Analysis

C63/100
18
9
0
Meta Tags7/15
Content10/12
Headings8/8
Technical18/25
E-E-A-T3/7
Images3/7
Links2/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
O
oi-wiki.orgoi-wiki.org

OI Wiki - OI Wiki

OI Wiki 是一个编程竞赛知识整合站点，提供有趣又实用的编程竞赛知识以及其他有帮助的内容，帮助广大编程竞赛爱好者更快更深入地学习编程竞赛

Title Length17 chars

Recommended: 50-60 chars (~103px / 580px)

Description Length70 chars

Recommended: 120-160 chars

Issues (0)

    9 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    465 URLs

    robots.txt

    1 rules

    Sitemap reference found

    Allows all crawlers

    Local SEO

    Local Search Readiness

    7/100
    Poor
    3 14 2

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

    Sponsored

    AI & LLM Readiness

    D42/100
    Bot Access
    20/25
    Machine Read.
    15/25
    Schema Data
    0/25
    Citation
    7/25

    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.txtinvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:4%
    Words:913
    Token eff.:Optimal
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary763w
    Descriptive Headingsavg 3w
    Canonical URL
    Open Graph0/3
    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.
    B
    74/100
    14
    Passed
    2
    Critical
    1
    Warnings
    Images & Alt Text
    10/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    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
    9/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    5/15
    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.
    39/100
    D
    261 mg
    CO₂e / view
    2.1 MB
    Page Weight
    50%
    Cleaner Than
    New Visitor
    299 mg
    vs
    Returning (cached)
    149 mg
    Annual (10K/mo)
    31.4 kg
    Emission Segments
    Data Center
    58 mg
    Network
    63 mg
    Device
    140 mg
    Resource Breakdown
    JavaScript
    142.2 KB
    Images
    56.3 KB
    CSS
    1.7 MB
    Fonts
    1.5 KB
    HTML
    115.3 KB
    Other
    72.8 KB
    Green Hosting Not Verified
    DMIT Cloud Services
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    36%Critical
    Interactive

    HTTPS

    No WAF

    89d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/2

    Valid From

    16.05.2026

    Valid Until

    14.08.2026

    Subject Alternative Names (2)

    *.oi-wiki.orgoi-wiki.org

    SHA-256 Fingerprint

    F5:05:E5:C0:00:4E:40:B9:06:CC:48:E3:E6:82:44:25:90:9C:B3:79...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    content-length
    117808
    content-type
    text/html
    date
    Sun, 17 May 2026 14:31:04 GMT
    etag
    "6a06e543-1cc30"
    last-modified
    Fri, 15 May 2026 09:20:03 GMT
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (2)

    mxbiz1.qq.com
    mxbiz2.qq.com

    Domain Information

    oi-wiki.org

    Domain Age
    7y 9m

    Created

    19.08.2018

    Expires

    19.08.2028

    Last Updated

    23.08.2023

    Registrar

    NameSilo, LLC

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookie Consent Banner
    Privacy Policy
    Terms of Service

    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
    68/100
    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
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    -apple-system

    WCAG AA
    81/100
    Readability
    /30
    25/30

    18px · LH 1.60

    Hierarchy
    /20
    16/20

    2x ratio · ✓ H1→H6

    WCAG
    /25
    23/25

    6.86:1 min contrast

    Performance
    /25
    17/25

    System fonts

    Heading Font

    -apple-system

    Sans35px

    Body Font

    -apple-system

    Sans18px

    Contrast Ratio

    6.86:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    ~39 CPL

    Narrow lines
    35px
    h1
    28px
    h2
    18px
    p

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

    ✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 6.9:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

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

    GGoogle FontsFluid Type (rem)Flesch 0

    Color Palette

    6 unique colors
    3.19:1 AA Large Light
    #ffffff
    Primary· 85.89999999999999%
    #909090
    Other· 2.3%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    13 Resources

    7
    Scripts
    6
    Styles
    3
    Async
    0
    Defer

    Top Script Sources

    googletagmanager.com(2)oi-wiki.org(2)google-analytics.com(1)assets(1)_static(1)

    Website Identity

    oi-wiki.org

    hmq011212@163.com
    7 years old
    Location detected: 🇺🇸 United Statesvia ip
    NameSilo, LLCzh-Hans

    Social Profiles

    GitHub

    Sponsored

    Last analyzed: 17 May 2026 at 14:31

    Historical Analysis & Change Tracking