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espruino.com

https://espruino.com· First analyzed 13 May 2026· Updated 13 May 2026
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espruino.com
Desktop screenshot of espruino.com
Mobile screenshot of espruino.com
Mobile

Sponsored

Hosting Provider

MB Core

IP Address

93.93.135.13

Site Location

🇬🇧 United Kingdomvia ip

Server Location

🇬🇧 London, United Kingdom

ASN

AS44684

Organization

MB Core

Server

Apache

Nameservers

ns3.livedns.co.uk.ns1.livedns.co.uk.ns2.livedns.co.uk.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
571 ms10%
Speed Index
742 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
806 KB
35 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
Infrastructure
Hosting
MB Core

Technology Stack

6 Technologies Detected

CSS Frameworks

2
Bootstrap
Tailwind CSS

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv1.11.1

Web Servers

1
Apachev2.4.29

SEO Analysis

C68/100
19
8
0
Meta Tags10/15
Content12/12
Headings6/8
Technical18/25
E-E-A-T3/7
Images2/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
E
espruino.comespruino.com

Espruino - JavaScript for Microcontrollers

JavaScript on a Microcontroller

Title Length42 chars

Recommended: 50-60 chars (~252px / 580px)

Description Length31 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    813 URLs

    robots.txt

    3 rules

    Sitemap reference found

    Allows all crawlers

    Local SEO

    Local Search Readiness

    6/100
    Poor
    2 13 2

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

    Sponsored

    AI & LLM Readiness

    D44/100
    Bot Access
    20/25
    Machine Read.
    10/25
    Schema Data
    3/25
    Citation
    11/25

    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
    blockquotes
    Text ratio:17%
    Words:892
    Token eff.:Optimal
    Sections/1K:11.2
    Depth:1/5

    Structured Data

    1 JSON-LD
    WebSiteSearchAction

    Citation Readiness

    Opening Summary19w
    Descriptive Headingsavg 4.2w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    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.
    C
    63/100
    7
    Passed
    5
    Critical
    1
    Warnings
    Images & Alt Text
    15/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    11/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    10/15
    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
    3/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    3 recommendations
    • •Accessibility recommendation preview...
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    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.
    50/100
    B
    81 mg
    CO₂e / view
    806.2 KB
    Page Weight
    80%
    Cleaner Than
    New Visitor
    93 mg
    vs
    Returning (cached)
    47 mg
    Annual (10K/mo)
    9.8 kg
    Emission Segments
    Data Center
    4 mg
    Network
    24 mg
    Device
    54 mg
    Resource Breakdown
    JavaScript
    128.9 KB
    Images
    302.4 KB
    CSS
    343.4 KB
    HTML
    30.5 KB
    Other
    1.0 KB
    Green Hosting Verified
    Mythic Beasts Ltd
    GWF Verified
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    0%Critical
    Interactive

    No SSL

    No WAF

    nulld

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-store, no-cache, must-revalidate)
    connection
    close
    content-type
    text/html; charset=UTF-8
    date
    Wed, 13 May 2026 02:31:03 GMT
    expires
    Thu, 19 Nov 1981 08:52:00 GMT
    pragma
    no-cache
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (5)

    alt2.aspmx.l.google.com
    aspmx.l.google.com
    aspmx2.googlemail.com
    alt1.aspmx.l.google.com

    +1 more

    Domain Information

    espruino.com

    Domain Age
    13y 7m

    Created

    07.10.2012

    Expires

    07.10.2027

    Last Updated

    09.10.2025

    Registrar

    IONOS SE

    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.
    D
    59/100
    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

    Helvetica Neue

    WCAG Partial
    76/100
    Readability
    /30
    22/30

    14px · LH 1.43

    Hierarchy
    /20
    16/20

    2.57x ratio

    WCAG
    /25
    17/25

    1.84:1 min contrast

    Performance
    /25
    21/25

    System fonts

    Heading Font

    Helvetica Neue

    Sans36px

    Body Font

    Helvetica Neue

    Sans14px

    Contrast Ratio

    1.84:1

    10 issues

    Reading Comfort

    ~41 CPL

    Narrow lines
    36px
    h1
    40px
    h2
    14px
    p
    Major Second
    Scale

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

    ✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

    ⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 1.8:1).

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

    ✅ Strong hierarchy: Headlines are 2.6x larger than body text.

    ✅ System fonts: Zero font loading delay — best possible LCP impact.

    Flesch 60

    Color Palette

    9 unique colors
    17.03:1 AAA Light
    #ffffff
    Background· 35.900000000000006%
    #1c1c1d
    Text· 7.9%
    #d8dce2
    Primary· 7%
    #81969a
    Secondary· 6.4%
    #c3d1e0
    Secondary· 3.9%
    #6c5561
    Secondary· 2.3%
    #ebe9cc
    Secondary· 0.5%

    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

    7 Resources

    5
    Scripts
    2
    Styles
    1
    Async
    0
    Defer

    Top Script Sources

    local(4)googletagmanager.com(1)

    Website Identity

    espruino.com

    13 years old
    Location detected: 🇬🇧 United Kingdomvia ip
    IONOS SE📧 Google Workspaceen

    Sponsored

    Last analyzed: 13 May 2026 at 02:31

    Historical Analysis & Change Tracking