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calvinseng.com

https://calvinseng.com· First analyzed 12 May 2026· Updated 12 May 2026
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calvinseng.com
Desktop screenshot of calvinseng.com
Mobile screenshot of calvinseng.com
Mobile

Sponsored

Hosting Provider

Linode (Akamai)
linode.com

IP Address

172.104.61.49

Site Location

🇸🇬 Singapore, Singaporevia schema

Server Location

🇸🇬 Singapore, Singapore

ASN

AS63949

Organization

Linode

Server

Nginx

Nameservers

ns2.digitalocean.com.ns3.digitalocean.com.ns1.digitalocean.com.

Performance

83

Core Web Vitals

Weight

First Contentful Paint
1.9 s10%
Speed Index
2.5 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.1 MB
117 requests

Image Optimization

WebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPressv6.9.4
cms
Salientv18.1.1Custom
by ThemeNectar
View Theme

Technology Stack

26 Technologies Detected

Plugins

13
Easy Digital Downloads
Ninja Google ReviewSalient SocialSticky Menu Or Anything On ScrollEdd RecurringEdd Reviews
Duracelltomi Google Tag Manager
Foobar PremiumBravepopup ProSalient PortfolioSalient CoreJs_Composer_Salient
Yoast SEO

Analytics

3
Google Analytics
Google Analytics 4
Facebook Pixel

Frameworks

1
Angular

Libraries

1
jQueryv3.7.1

UI Components

1
Slick Carousel

Other

1
Anime.js

CSS Frameworks

1
Tailwind CSS

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Tag Managers

1
Google Tag Manager

Payments

1
Stripe

Web Servers

1
Nginx

SEO Analysis

A+92/100
27
5
0
Meta Tags15/15
Content10/12
Headings7/8
Technical25/25
E-E-A-T7/7
Images3/7
Links5/5
URL5/5
Social5/5
Freshness4/4
Mobile3/4
Indexability3/3
C
calvinseng.comcalvinseng.com

Top-Rated Web Design & App Development in Singapore

Design & develop custom ecommerce web, corporate website, mobile applications fast by established freelance web designer in Singapore.

Title Length51 chars

Recommended: 50-60 chars (~313px / 580px)

Description Length134 chars

Recommended: 120-160 chars

Issues (0)

    5 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    4 URLs

    4 sub-sitemaps

    robots.txt

    4 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    69/100
    Good
    18 7

    Sponsored

    AI & LLM Readiness

    C65/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    16/25
    Citation
    22/25

    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:6%
    Words:2,350
    Token eff.:Optimal

    Structured Data

    8 JSON-LD
    Article×1.2Person×1.3Organization×1.1WebSiteLocalBusiness×1.1SearchAction
    sameAs entity links

    Citation Readiness

    Opening Summary42w
    Descriptive Headingsavg 5.3w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (6)
    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
    83/100
    14
    Passed
    3
    Critical
    2
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    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
    11/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    10/15
    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.
    44/100
    D
    221 mg
    CO₂e / view
    2.1 MB
    Page Weight
    50%
    Cleaner Than
    New Visitor
    253 mg
    vs
    Returning (cached)
    127 mg
    Annual (10K/mo)
    26.6 kg
    Emission Segments
    Data Center
    11 mg
    Network
    65 mg
    Device
    145 mg
    Resource Breakdown
    JavaScript
    641.5 KB
    Images
    327.8 KB
    CSS
    1.0 MB
    Fonts
    125.5 KB
    HTML
    40.2 KB
    Other
    454 B
    Green Hosting Verified
    Linode (Akamai)
    Provider Match
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    25%Critical
    Critical / Transactional

    HTTPS

    No WAF

    86d

    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

    09.05.2026

    Valid Until

    07.08.2026

    Subject Alternative Names (2)

    calvinseng.comwww.calvinseng.com

    SHA-256 Fingerprint

    22:54:03:2F:D3:B8:2A:E4:7F:AB:F4:90:63:49:EB:80:1B:C1:36:4A...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    content-encoding
    📦 Gzip(gzip)
    content-type
    text/html; charset=UTF-8
    date
    Tue, 12 May 2026 19:16:32 GMT
    link
    <https://calvinseng.com/wp-json/>; rel="https://api.w.org/",...
    referrer-policy
    strict-origin-when-cross-origin
    server
    nginx
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    68

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (5)

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

    +1 more

    Domain Information

    calvinseng.com

    Domain Age
    11y 10m

    Created

    04.07.2014

    Expires

    04.07.2026

    Last Updated

    27.06.2025

    Registrar

    eNom, LLC

    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
    68/100
    Mobile Friendly62 breakpoints
    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, maximum-scale=1, user-scalable=0
    3 recommendations
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Roboto

    WCAG Partial
    73/100
    Readability
    /30
    20/30

    18px · LH 1.67

    Hierarchy
    /20
    17/20

    4.27x ratio

    WCAG
    /25
    16/25

    2.35:1 min contrast

    Performance
    /25
    20/25

    System fonts

    Heading Font

    Roboto

    Sans77px

    Body Font

    Roboto

    Sans18px

    Contrast Ratio

    2.35:1

    29 issues

    Reading Comfort

    ~35 CPL

    Narrow lines
    77px
    h1
    56px
    h2
    24px
    h3
    16px
    h4
    18px
    p

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

    ⚠️ Hard to read: Flesch score 46/100. Simplify sentences for wider reach.

    ⚠️ Partial contrast: 29 elements below WCAG AA threshold (min 2.4:1).

    ⚠️ Minor heading issue: 1 level skip(s) detected. Maintain sequential order for screen readers.

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

    ⚠️ Fluid type without rem: clamp() detected but missing rem units. May fail WCAG 1.4.4 zoom test.

    GGoogle FontsFluid TypeFlesch 46

    Color Palette

    6 unique colors
    Light
    #8c858e
    Other· 4.4%
    #ebf5fe
    Primary· 49.199999999999996%
    #c9c9fa
    Accent· 16.9%
    #cbf2fd
    Accent· 9%

    Business & Marketing Stack

    4 Tools Detected

    Advanced

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Advertising

    2
    Facebook PixelMid-Market
    Reddit PixelMid-Market

    Ad platforms and retargeting pixels

    2

    Categories

    4

    Total Tools

    0

    Enterprise

    2

    Mid-Market

    Assessment: Well-developed marketing technology stack

    Sponsored

    Scripts & Styles

    30 Resources

    20
    Scripts
    10
    Styles
    5
    Async
    0
    Defer

    Top Script Sources

    calvinseng.com(14)connect.facebook.net(2)googletagmanager.com(2)redditstatic.com(1)js.stripe.com(1)

    Website Identity

    Calvin Seng Co Pte Ltd

    Calvin Seng Co Pte Ltd

    LocalBusiness

    Design & develop custom ecommerce web, corporate website, mobile applications fast by established freelance web designer in Singapore.

    hello@calvinseng.com
    92348807
    11 years old

    11 Woodlands Drive 72, #07-35 Woodsvale, Singapore

    738094, Singapore, SG

    SG

    Location detected: 🇸🇬 Singapore, Singaporevia schema
    eNom, LLC📧 Google Workspaceen-US

    Social Profiles

    Facebook

    Sponsored

    Last analyzed: 12 May 2026 at 19:17

    Historical Analysis & Change Tracking