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svelte.dev

https://svelte.dev· First analyzed 22 Apr 2026· Updated 22 Apr 2026
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svelte.dev
Desktop screenshot of svelte.dev
Mobile screenshot of svelte.dev
Mobile

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Hosting Provider

Vercel
vercel.com

IP Address

76.76.21.123

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

CDN

Cloudflare

WAF

Cloudflare

Nameservers

jean.ns.cloudflare.com.cody.ns.cloudflare.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
456 ms10%
Speed Index
593 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
740 KB
53 requests

Image Optimization

WebPAVIFResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Framework
Svelte
Infrastructure
Platform
Vercel
CDN
Cloudflare

Progressive Web App

Web ManifestTheme Color

Technology Stack

6 Technologies Detected

Frameworks

1
Svelte

Meta Frameworks

1
SvelteKit

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Platforms

1
Vercel

CDN

1
Cloudflare

SEO Analysis

D59/100
17
8
0
Meta Tags10/15
Content6/12
Headings6/8
Technical13/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social2/5
Freshness0/4
Mobile4/4
Indexability3/3
S
svelte.devsvelte.dev

Svelte • Web development for the rest of us

Web development for the rest of us

Title Length43 chars

Recommended: 50-60 chars (~267px / 580px)

Description Length34 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap
    robots.txt

    2 rules

    Allows all crawlers

    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

    D51/100
    Bot Access
    20/25
    Machine Read.
    21/25
    Schema Data
    0/25
    Citation
    10/25

    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.txtvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:2%
    Words:301
    Token eff.:Optimal
    Sections/1K:6.6
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary23w
    Descriptive Headingsavg 5w
    Canonical URL
    Open Graph0/3
    Twitter Card3/3
    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.
    B
    76/100
    12
    Passed
    1
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    16/20
    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
    13/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    7/15
    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.
    78/100
    A
    75 mg
    CO₂e / view
    740.1 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    85 mg
    vs
    Returning (cached)
    43 mg
    Annual (10K/mo)
    9.0 kg
    Emission Segments
    Data Center
    4 mg
    Network
    22 mg
    Device
    49 mg
    Resource Breakdown
    JavaScript
    128.6 KB
    Images
    280.7 KB
    CSS
    237.6 KB
    Fonts
    69.6 KB
    HTML
    23.4 KB
    Other
    302 B
    Green Hosting Verified
    Vercel
    Provider Match
    1 recommendation
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    36%Critical
    Interactive

    HTTPS

    No WAF

    83d

    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

    16.04.2026

    Valid Until

    15.07.2026

    Subject Alternative Names (1)

    svelte.dev

    SHA-256 Fingerprint

    6A:6C:6F:FA:9B:7B:63:62:9F:CF:AE:B6:FA:FC:D3:5B:11:A0:2E:73...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-origin
    *
    age
    7950
    cache-control
    🟡 0s(public, max-age=0, must-revalidate)
    content-disposition
    inline
    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html; charset=utf-8
    Good Warning Issue

    Email Infrastructure

    Fastmail

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (2)

    in2-smtp.messagingengine.com
    in1-smtp.messagingengine.com

    Domain Information

    svelte.dev

    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
    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
    2 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    DM Serif Display + Georgia

    WCAG AA
    82/100
    Readability
    /30
    24/30

    18px · LH 1.50

    Hierarchy
    /20
    15/20

    3x ratio

    WCAG
    /25
    23/25

    4.97:1 min contrast

    Performance
    /25
    20/25

    2 fonts · 3 req

    Heading Font

    DM Serif Display

    Serif54px

    Body Font

    Georgia

    Serif18px

    Contrast Ratio

    4.97:1

    WCAG AA (≥4.5:1)

    Reading Comfort

    ~36 CPL

    Narrow lines
    54px
    h1
    54px
    h2
    18px
    p
    Minor Second
    Scale

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

    ✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 18/100. Consider shorter sentences and simpler words.

    ✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.0:1).

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

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

    Buy on MyFontsFluid Type (rem)Flesch 18

    Color Palette

    6 unique colors
    7.91:1 AAA Dark
    #2b2c2e
    Text· 7.5%
    #c1c3c6
    Other· 4.9%
    #ff3e00
    Primary· 0%
    #f0f5f9
    Background· 71.30000000000001%
    #e1e7eb
    Secondary· 5.5%
    #704c46
    Secondary· 4.8%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    9 Resources

    2
    Scripts
    7
    Styles
    0
    Async
    2
    Defer

    Top Script Sources

    local(2)

    Website Identity

    svelte.dev

    Location detected: 🇺🇸 United Statesvia ip
    📧 Fastmailen

    Sponsored

    Last analyzed: 22 Apr 2026 at 19:55

    Historical Analysis & Change Tracking