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astro.build

https://astro.build· First analyzed 17 Feb 2026· Updated 20 Mar 2026
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astro.build
Desktop screenshot of astro.build
Mobile screenshot of astro.build
Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)
aws.amazon.com

IP Address

15.197.167.90

Server Location

🇨🇦 Montreal, Canada

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

Netlify

Nameservers

dns3.p04.nsone.net.dns4.p04.nsone.net.dns1.p04.nsone.net.dns2.p04.nsone.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
552 ms10%
Speed Index
718 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
234 KB
17 requests

Image Optimization

Lazy LoadWebPImageKit
0–49
50–89
90–100

Architecture Stack

Hybrid
⚙️ SSR
Frontend
Framework
Astro
Styling
Tailwind CSS
CMS
Webflow
Infrastructure
Hosting
Amazon Web Services (AWS)

Technology Stack

5 Technologies Detected

Frameworks

1
SolidJS

Meta Frameworks

1
Astro

CSS Frameworks

1
Tailwind CSS

Analytics

1
Fathom Analytics

Platforms

1
Netlify

SEO Analysis

B71/100
22
5
0
Meta Tags8/15
Content10/12
Headings8/8
Technical19/25
E-E-A-T0/7
Images4/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile4/4
Indexability3/3
A
astro.buildastro.build

Astro

Astro builds fast content sites, powerful web applications, dynamic server APIs, and everything in-between.

Title Length5 chars

Recommended: 50-60 chars (~31px / 580px)

Description Length107 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    1 URLs

    1 sub-sitemaps

    robots.txt

    3 rules

    Sitemap reference found

    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

    D53/100
    Bot Access
    20/25
    Machine Read.
    19/25
    Schema Data
    0/25
    Citation
    14/25

    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
    code blocksnav
    Text ratio:2%
    Words:978
    Token eff.:Optimal
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary109w
    Descriptive Headingsavg 2.6w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (8)
    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+
    94/100
    17
    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
    15/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    9/15
    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.
    66/100
    D
    249 mg
    CO₂e / view
    2.4 MB
    Page Weight
    30%
    Cleaner Than
    New Visitor
    285 mg
    vs
    Returning (cached)
    142 mg
    Annual (10K/mo)
    29.9 kg
    Emission Segments
    Data Center
    12 mg
    Network
    73 mg
    Device
    164 mg
    Resource Breakdown
    JavaScript
    549.2 KB
    Images
    1.4 MB
    CSS
    101.5 KB
    HTML
    314.7 KB
    Other
    29.3 KB
    Green Hosting Verified
    Amazon Web Services (AWS)
    Provider Match
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    36%Critical
    Interactive

    HTTPS

    No WAF

    79d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Let's Encrypt

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-384

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    10.03.2026

    Valid Until

    08.06.2026

    Subject Alternative Names (3)

    *.astro.build*.preview.astro.buildastro.build

    SHA-256 Fingerprint

    A7:92:3F:87:D8:68:D6:F4:4C:17:41:7B:50:63:07:FB:A5:CB:F0:20...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    age
    1431
    cache-control
    🟡 0s(public,max-age=0,must-revalidate)
    cache-status
    "Netlify Edge"; hit
    content-encoding
    ⚡ Brotli(br)
    content-length
    79483
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    20

    SPF
    DKIM
    DMARC

    MX Records (5)

    alt3.aspmx.l.google.com
    alt1.aspmx.l.google.com
    alt4.aspmx.l.google.com
    alt2.aspmx.l.google.com

    +1 more

    Domain Information

    astro.build

    Domain Age
    5 years

    Created

    13.03.2021

    Expires

    13.03.2027

    Last Updated

    01.03.2026

    Registrar

    Namecheap

    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.
    B
    76/100
    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

    Typography & Readability

    Obviously + ui-sans-serif

    93/100
    Readability
    /30
    40/40

    16px · LH 1.50

    Hierarchy
    /20
    25/25

    3x ratio

    WCAG
    /25
    15/15

    Contrast: undefined

    Performance
    /25
    20/20

    System fonts

    Heading Font

    Obviously

    Sans48px

    Body Font

    ui-sans-serif

    Sans16px

    Contrast Ratio

    --

    Reading Comfort

    ~39 CPL

    Needs attention
    48px
    h1
    36px
    h2
    16px
    h3
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

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

    ✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

    ✅ Smart font loading: Using font-display: swap prevents invisible text during load.

    ✅ Protected text on images: Using gradient for readability.

    Buy on MyFontsVariable Fonts

    Color Palette

    6 unique colors
    Light
    #1a1468
    Accent· 36%
    #5318a2
    Accent· 27.1%
    #8d46e7
    Primary· 0%
    #361481
    Accent· 18.8%
    #170f45
    Accent· 10.6%
    #d9d5e6
    Secondary· 4.2%
    #573b90
    Secondary· 3.2%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    2
    FathomSMB
    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

    7
    Scripts
    2
    Styles
    1
    Async
    1
    Defer

    Top Script Sources

    local(6)cdn.usefathom.com(1)

    Website Identity

    Sponsored

    Last analyzed: 20 Mar 2026 at 16:27

    AI-Powered Analysis

    Technical Deep Dive

    Technology Analysis for astro.build

    StackOptic has analyzed this website's technology stack. View the detailed breakdown in the sections above.

    Analysis by StackOptic AIMar 20, 2026

    AI-Powered Insights

    Historical Analysis & Change Tracking