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castos.com

https://castos.com· First analyzed 25 Apr 2026· Updated 25 Apr 2026
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castos.com
Desktop screenshot of castos.com
Mobile screenshot of castos.com
Mobile

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Hosting Provider

Cloudflare
cloudflare.com

IP Address

104.18.9.41

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

kinsley.ns.cloudflare.com.camilo.ns.cloudflare.com.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
885 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
344 KB
59 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms
generatepress

Technology Stack

14 Technologies Detected

Plugins

6
Castos ShortcodesNovashareGp PremiumTermageddon UsercentricsPerfmatters
Yoast SEO

Analytics

2
Google Analytics
Google Analytics 4

Libraries

1
jQueryv3.7.1

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Marketing

1
HubSpot

Other

1
VWO

CDN

1
Cloudflare

SEO Analysis

A84/100
25
5
1
Meta Tags15/15
Content10/12
Headings8/8
Technical24/25
E-E-A-T2/7
Images4/7
Links2/5
URL5/5
Social4/5
Freshness4/4
Mobile3/4
Indexability3/3
C
castos.comcastos.com

Castos | The Podcast Homebase for Serious Creators

Publish unlimited episodes, run multiple shows, and monetize directly. Castos is the podcast homebase for creators who want total control.

Title Length50 chars

Recommended: 50-60 chars (~308px / 580px)

Description Length138 chars

Recommended: 120-160 chars

Issues (1)

  • • Most images missing alt text (45/51) — critical for accessibility and SEO

6 issues found

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Crawlability

Sitemap

Type: index

8 URLs

8 sub-sitemaps

robots.txt

7 rules

Sitemap reference found

Local SEO

Local Search Readiness

19/100
Poor
5 13

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

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AI & LLM Readiness

D56/100
Bot Access
20/25
Machine Read.
11/25
Schema Data
8/25
Citation
17/25

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.txtinvalid
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:3%
Words:1,429
Token eff.:Optimal

Structured Data

5 JSON-LD
Organization×1.1WebSiteBreadcrumbListSearchAction
sameAs entity links

Citation Readiness

Opening Summary68w
Descriptive Headingsavg 5.3w
Canonical URL
Open Graph3/3
Twitter Card1/3
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.
A
89/100
15
Passed
1
Critical
0
Warnings
Images & Alt Text
18/20
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
6/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

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.
85/100
A+
35 mg
CO₂e / view
344.1 KB
Page Weight
90%
Cleaner Than
New Visitor
40 mg
vs
Returning (cached)
20 mg
Annual (10K/mo)
4.2 kg
Emission Segments
Data Center
2 mg
Network
10 mg
Device
23 mg
Resource Breakdown
JavaScript
50.8 KB
Images
155.0 KB
CSS
90.4 KB
HTML
47.9 KB
Green Hosting Verified
Cloudflare
GWF Verified
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
C

Security Score

66%Fair
Interactive

HTTPS

WAF

32d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

27.02.2026

Valid Until

28.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

castos.com*.castos.com

SHA-256 Fingerprint

B8:52:8F:D7:36:B9:A7:D5:20:2D:9D:23:51:50:D6:12:4F:0A:A0:02...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

cache-control
🟢 1 Month(max-age=15552000, must-revalidate)
cf-cache-status
DYNAMIC
cf-ray🇫🇷 Paris
9f1d6f046e00d58c-CDG
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Sat, 25 Apr 2026 12:43:30 GMT
Good Warning Issue

Email Infrastructure

Google Workspace

Score

95

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (5)

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

+1 more

Domain Information

castos.com

Domain Age
23y 10m

Created

02.07.2002

Expires

02.07.2026

Last Updated

04.08.2022

Registrar

Network Solutions, LLC

DNSSEC
Not Enabled

Privacy & Compliance

Usercentrics

Cookie Consent Banner
Usercentrics
Privacy Policy
Terms of Service

GDPR Indicators

Cookie consent banner detected
CMP: Usercentrics
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.
A
83/100
Mobile Friendly31 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
2 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Kanit + Inter

WCAG Partial
78/100
Readability
/30
24/30

20px · LH 1.50

Hierarchy
/20
17/20

2.8x ratio · ✓ H1→H6

WCAG
/25
17/25

1:1 min contrast

Performance
/25
20/25

2 fonts · 3 req

Heading Font

Kanit

Sans56px

Body Font

Inter

Sans20px

Contrast Ratio

1:1

18 issues

Reading Comfort

~33 CPL

Narrow lines
56px
h1
48px
h2
24px
h3
20px
p

✅ Excellent readability: 20px body text is ideal for all devices.

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

⚠️ Partial contrast: 18 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 2.8x larger than body text.

✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

Buy on MyFontsFluid Type (rem)Flesch 51

Color Palette

7 unique colors
Light
#ffffff
Background· 16.9%
#0f172a
Secondary· 36.599999999999994%
#1e1841
Primary· 20.4%
#3c1f60
Accent· 9.9%
#695877
Secondary· 7.7%
#bb2b75
Accent· 5.3%

Business & Marketing Stack

5 Tools Detected

Enterprise

CRM Systems

1
HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

2
Google Tag ManagerFree
Google AnalyticsFree

User behavior and product analytics

Affiliate & Partnerships

1
RewardfulSMB

Affiliate networks and partner tracking

A/B Testing & Optimization

1
VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

4

Categories

5

Total Tools

0

Enterprise

2

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

26 Resources

18
Scripts
8
Styles
6
Async
8
Defer

Top Script Sources

castos.com(8)googletagmanager.com(3)app.usercentrics.eu(2)privacy-proxy.usercentrics.eu(1)dev.visualwebsiteoptimizer.com(1)

Website Identity

Castos

Castos

Organization

Publish unlimited episodes, run multiple shows, and monetize directly. Castos is the podcast homebase for creators who want total control.

castos.com/
23 years old
Location detected: 🇨🇦 Canadavia ip
Network Solutions, LLC📧 Google Workspaceen-US

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Last analyzed: 25 Apr 2026 at 12:43

Historical Analysis & Change Tracking