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sizzy.co

https://sizzy.co· First analyzed 17 May 2026· Updated 17 May 2026
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sizzy.co
Desktop screenshot of sizzy.co
Mobile screenshot of sizzy.co
Mobile

Sponsored

Hosting Provider

Vercel
vercel.com

IP Address

76.76.21.21

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

Nameservers

dns2.registrar-servers.com.dns1.registrar-servers.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
656 ms10%
Speed Index
853 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
254 KB
21 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
Infrastructure
Platform
Vercel

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

2 Technologies Detected

CSS Frameworks

1
Tailwind CSS

Platforms

1
Vercel

SEO Analysis

A80/100
24
4
0
Meta Tags11/15
Content10/12
Headings8/8
Technical21/25
E-E-A-T5/7
Images4/7
Links4/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
S
sizzy.cosizzy.co

Sizzy - The Browser for Web Developers | Develop Faster. Stress Less.

Sizzy is a specialized browser workspace for web development. Test on multiple devices simultaneously with synchronized scrolling, clicking, and forms. Debug...

Description truncated.
Title Length69 chars

Recommended: 50-60 chars (~420px / 580px)

Description Length180 chars

Recommended: 120-160 chars

Issues (0)

    4 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    15 URLs

    robots.txt

    3 rules

    Sitemap reference found

    Allows all crawlers

    Local SEO

    Local Search Readiness

    14/100
    Poor
    4 12 1

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

    Sponsored

    AI & LLM Readiness

    D47/100
    Bot Access
    20/25
    Machine Read.
    12/25
    Schema Data
    3/25
    Citation
    12/25

    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:7%
    Words:1,792
    Token eff.:Optimal
    Sections/1K:24

    Structured Data

    1 JSON-LD
    Person×1.3

    Citation Readiness

    Opening Summary19w
    Descriptive Headingsavg 2.7w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    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
    79/100
    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
    18/20
    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
    2/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 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.
    81/100
    A+
    26 mg
    CO₂e / view
    254.0 KB
    Page Weight
    95%
    Cleaner Than
    New Visitor
    29 mg
    vs
    Returning (cached)
    15 mg
    Annual (10K/mo)
    3.1 kg
    Emission Segments
    Data Center
    1 mg
    Network
    8 mg
    Device
    17 mg
    Resource Breakdown
    JavaScript
    216.7 KB
    Images
    1.2 KB
    CSS
    17.6 KB
    HTML
    18.5 KB
    Green Hosting Verified
    Vercel
    Provider Match
    1 recommendation
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    76%Good
    Static / Informational

    HTTPS

    No WAF

    46d

    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

    03.04.2026

    Valid Until

    02.07.2026

    Subject Alternative Names (1)

    sizzy.co

    SHA-256 Fingerprint

    54:FA:EB:38:36:C9:45:F8:D8:64:A7:61:47:66:73:4C:95:6D:35:22...

    Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    access-control-allow-origin
    *
    age
    270582
    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

    Amazon SES

    Score

    65

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (1)

    inbound-smtp.us-east-2.amazonaws.com

    Domain Information

    sizzy.co

    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.
    B
    73/100
    Mobile Friendly
    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 Color Emoji

    WCAG Partial
    68/100
    Readability
    /30
    16/30

    14px · LH 1.63

    Hierarchy
    /20
    20/20

    4.29x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    16/25

    1 font

    Heading Font

    Apple Color Emoji

    Sans60px

    Body Font

    Apple Color Emoji

    Sans14px

    Contrast Ratio

    1:1

    43 issues

    Reading Comfort

    ~37 CPL

    Narrow lines
    60px
    h1
    48px
    h2
    20px
    h3
    14px
    h4
    14px
    p

    ⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

    ⚠️ Partial contrast: 43 elements below WCAG AA threshold (min 1.0:1).

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

    ✅ Strong hierarchy: Headlines are 4.3x larger than body text.

    ✅ Lean font stack: 1 font families keeps load times fast.

    ⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

    Buy on MyFontsFlesch 52

    Color Palette

    3 unique colors
    4.28:1 AA Large Dark
    #010101
    Background· 87.99999999999999%
    #717172
    Other· 4%
    #ffffff
    Primary· 0%

    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

    2 Resources

    1
    Scripts
    1
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    local(1)

    Website Identity

    Sizzy

    SoftwareApplication

    Sizzy is a specialized browser workspace for web development. Test on multiple devices simultaneously with synchronized scrolling, clicking, and forms. Debug CSS like never before.

    hi@kitze.io
    Location detected: 🇺🇸 United Statesvia ip
    📧 Amazon SESen

    Social Profiles

    X (Twitter)GitHub

    Sponsored

    Last analyzed: 17 May 2026 at 03:04

    Historical Analysis & Change Tracking