caster.fm

https://caster.fm· First analyzed 10 May 2026· Updated 10 May 2026

Export

caster.fm

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.26.13.219

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

sean.ns.cloudflare.com.collins.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

834 ms10%

Speed Index

1.1 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.4 MB

82 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Hello Elementorv3.4.7

by Elementor Team

View Theme

Technology Stack

19 Technologies Detected

Plugins

Elementor

Wp Live Chat Software For Wordpress

Dynamicconditions

Elementor

Premium Addons For Elementor

Libraries

UI Components

Other

CSS Frameworks

Icon Libraries

Analytics

Customer Support

CDN

SEO Analysis

B72/100

Meta Tags12/15

Content3/12

Headings7/8

Technical24/25

E-E-A-T2/7

Images2/7

Links5/5

URL5/5

Social4/5

Freshness2/4

Mobile3/4

Indexability3/3

caster.fmcaster.fm

Caster.fm - Free Radio Stream Hosting - Start Your Own Internet Radio

Caster.fm - Start your internet radio station for free. Icecast hosting, Shoutcast-compatible, with a built-in radio website CMS.

Title Length69 chars

Recommended: 50-60 chars (~428px / 580px)

Description Length129 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (12 words). Search engines need substantial content for ranking.
• Most images missing alt text (7/10) — critical for accessibility and SEO

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

4 URLs

4 sub-sitemaps

robots.txt

6 rules

Sitemap reference found

Local SEO

Local Search Readiness

23/100

Needs Work

6 11

Sponsored

AI & LLM Readiness

D48/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

13/25

Citation

2/25

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

Text ratio:2%

Words:1,358

Token eff.:Optimal

Structured Data

7 JSON-LD

FAQPage×1.5Organization×1.1WebSiteBreadcrumbListSearchAction

sameAs entity links

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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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.

67/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

6/20

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

14/15

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

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

2 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.

69/100

148 mg

CO₂e / view

1.4 MB

Page Weight

60%

Cleaner Than

New Visitor

169 mg

Returning (cached)

85 mg

Annual (10K/mo)

17.8 kg

Emission Segments

Data Center

7 mg

Network

44 mg

Device

97 mg

Resource Breakdown

JavaScript

226.2 KB

Images

743.9 KB

CSS

361.1 KB

Fonts

51.2 KB

HTML

82.7 KB

Green Hosting Verified

Cloudflare

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

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A+

Security Score

93%Excellent

Static / Informational

HTTPS

WAF

56d

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

07.04.2026

Valid Until

06.07.2026

Subject Alternative Names (4)

*.api.caster.fm*.caster.fm*.cloud.caster.fmcaster.fm

SHA-256 Fingerprint

68:1E:49:00:80:00:95:D1:60:9D:CC:7A:5C:8D:A9:90:02:4A:D1:DC...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 0s(max-age=0)

cf-apo-via

tcache

cf-cache-status

HIT

cf-edge-cache

cache,platform=wordpress

cf-ray

9f9b1f309c708f81-BOS

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

shirsrv.caster.fm

Domain Information

caster.fm

Domain Age

16y 1m

Created

13.04.2010

Expires

13.04.2028

Last Updated

08.01.2026

Registrar

101domain GRS Limited

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

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.

75/100

Mobile Friendly52 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...

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Typography & Readability

Magistral + Open Sans

WCAG Partial

54/100

Readability

/30

19/30

20px · LH 1.70

Hierarchy

/20

8/20

1.92x ratio

WCAG

/25

15/25

1.58:1 min contrast

Performance

/25

12/25

System fonts

Heading Font

Magistral

Sans38px

Body Font

Open Sans

Sans20px

Contrast Ratio

1.58:1

8 issues

Reading Comfort

~36 CPL

Narrow lines

38px

37px

17px

20px

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

⚠️ Hard to read: Flesch score 41/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 8 elements below WCAG AA threshold (min 1.6:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

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

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFontsFlesch 41

Color Palette

6 unique colors

7.28:1 AAA Light

#ffffff

Background· 59.6%

#5d545b

Other· 3%

#efefef

Primary· 0%

#503b3c

Secondary· 6.7%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

caster.fm(19)googletagmanager.com(1)

Website Identity

Caster.fm

Organization

Caster.fm is internet radio hosting software that lets anyone start a radio station online. Features include a live audio stream, AutoDJ playlist scheduling, a radio website with a built-in player, and Shoutcast/Icecast-compatible stream URLs.

www.caster.fm/

16 years old

Location detected: 🇨🇦 Canadavia ip

101domain GRS Limiteden-US

Social Profiles

Facebook X (Twitter)

Sponsored

Last analyzed: 10 May 2026 at 18:49

Historical Analysis & Change Tracking