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uvicorn.dev

https://uvicorn.dev· First analyzed 13 May 2026· Updated 13 May 2026
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uvicorn.dev
Desktop screenshot of uvicorn.dev
Mobile screenshot of uvicorn.dev
Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

172.67.148.23

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

aisha.ns.cloudflare.com.damon.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
591 ms10%
Speed Index
768 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
557 KB
24 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Cloudflare
CDN
Cloudflare

Technology Stack

7 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Google Tag Manager

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

CDN

1
Cloudflare

SEO Analysis

C64/100
19
7
0
Meta Tags5/15
Content12/12
Headings8/8
Technical18/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
U
uvicorn.devuvicorn.dev

Uvicorn

The lightning-fast ASGI server.

Title Length7 chars

Recommended: 50-60 chars (~41px / 580px)

Description Length31 chars

Recommended: 120-160 chars

Issues (0)

    7 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    14 URLs

    robots.txt

    21 rules

    Local SEO

    Local Search Readiness

    3/100
    Poor
    1 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

    D46/100
    Bot Access
    15/25
    Machine Read.
    23/25
    Schema Data
    0/25
    Citation
    8/25

    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.txtvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    code blocksnavheader/footer
    Text ratio:12%
    Words:1,400
    Token eff.:Optimal
    Sections/1K:4.3
    Depth:3/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary86w
    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 (7)
    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.
    A
    88/100
    16
    Passed
    0
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    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
    13/15
    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.
    1 recommendation
    • •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.
    76/100
    A
    56 mg
    CO₂e / view
    557.1 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    64 mg
    vs
    Returning (cached)
    32 mg
    Annual (10K/mo)
    6.8 kg
    Emission Segments
    Data Center
    3 mg
    Network
    17 mg
    Device
    37 mg
    Resource Breakdown
    JavaScript
    48.3 KB
    Images
    428.0 KB
    CSS
    27.9 KB
    Fonts
    2.5 KB
    HTML
    13.6 KB
    Other
    36.8 KB
    Green Hosting Verified
    Cloudflare
    GWF Verified
    1 recommendation
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    41%Poor
    Interactive

    HTTPS

    WAF

    31d

    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

    15.03.2026

    Valid Until

    13.06.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (1)

    uvicorn.dev

    SHA-256 Fingerprint

    7C:35:5E:DC:FA:8E:94:C9:64:AA:E0:F2:14:C2:1D:04:30:F0:8C:6B...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-origin
    *
    alt-svc
    h3=":443"; ma=86400
    cache-control
    🟡 0s(public, max-age=0, must-revalidate)
    cf-cache-status
    DYNAMIC
    cf-ray🇦🇹 Vienna
    9faeee362c51de3b-VIE
    content-encoding
    ⚡ Brotli(br)
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (5)

    eforward3.registrar-servers.com
    eforward1.registrar-servers.com
    eforward2.registrar-servers.com
    eforward4.registrar-servers.com

    +1 more

    Domain Information

    uvicorn.dev

    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
    62/100
    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
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    -apple-system

    WCAG AA
    78/100
    Readability
    /30
    23/30

    18px · LH 1.60

    Hierarchy
    /20
    11/20

    2x ratio

    WCAG
    /25
    23/25

    6.86:1 min contrast

    Performance
    /25
    21/25

    System fonts

    Heading Font

    -apple-system

    Sans35px

    Body Font

    -apple-system

    Sans18px

    Contrast Ratio

    6.86:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    ~40 CPL

    Narrow lines
    35px
    h1
    28px
    h2
    22px
    h3
    18px
    h4
    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 21/100. Consider shorter sentences and simpler words.

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

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

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

    GGoogle FontsFluid Type (rem)Flesch 21

    Color Palette

    8 unique colors
    2.23:1 Fail Light
    #ffffff
    Background· 83.2%
    #abadb8
    Secondary· 2.5%
    #3f51b5
    Primary· 5.4%
    #aecbc2
    Secondary· 2.3%
    #3f3f90
    Secondary· 1.6%
    #7777a5
    Secondary· 1.6%
    #3372a8
    Accent· 0.7%

    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

    6 Resources

    2
    Scripts
    4
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    googletagmanager.com(1)assets(1)

    Website Identity

    uvicorn.dev

    Location detected: 🇨🇦 Canadavia ip
    en

    Sponsored

    Last analyzed: 13 May 2026 at 04:31

    Historical Analysis & Change Tracking