rtl-sdr.com

https://rtl-sdr.com· First analyzed 27 Apr 2026· Updated 27 Apr 2026

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rtl-sdr.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.20.17.6

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ed.ns.cloudflare.com.nina.ns.cloudflare.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

745 ms10%

Speed Index

968 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

1.5 MB

79 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

Blaskanv2.6.4Custom

by Per Sandström

View Theme

Technology Stack

21 Technologies Detected

Plugins

Social Warfare

WooCommerce

Better Recent Comments Cleantalk Spam Protect Gourl Bitcoin Payment Gateway Paid Downloads Membership Honeypot Wp Polls

Easy Woocommerce Discounts Pro

Wp Youtube Lyte

Woocommerce Bulk Discount

Flying Pages Flying Analytics

Advertising

Google Ads Google AdSense

Libraries

Other

CSS Frameworks

Analytics

Email Marketing

CDN

Languages

SEO Analysis

D58/100

Meta Tags0/15

Content11/12

Headings3/8

Technical15/25

E-E-A-T3/7

Images6/7

Links5/5

URL5/5

Social2/5

Freshness2/4

Mobile3/4

Indexability3/3

rtl-sdr.comrtl-sdr.com

No Title Found

No description available for this page.

Title Length0 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing page title — critical for SEO rankings and SERP display
• Missing meta description — important for click-through rates in SERPs

11 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

10 URLs

10 sub-sitemaps

robots.txt

2 rules

Allows all crawlers

Local SEO

Local Search Readiness

16/100

Poor

6 11 2

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

D42/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

0/25

Citation

13/25

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

code blocksnavheader/footer

Text ratio:11%

Words:3,590

Token eff.:Poor Structure

Depth:3/5

Structured Data

No Schema

Citation Readiness

Opening Summary62w

Descriptive Headingsavg 1.9w

Canonical URL

Open Graph0/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (7)

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

15/20

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

Semantic Structure

12/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

12/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

12/15

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

7/15

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.

61/100

160 mg

CO₂e / view

1.5 MB

Page Weight

60%

Cleaner Than

New Visitor

183 mg

Returning (cached)

92 mg

Annual (10K/mo)

19.2 kg

Emission Segments

Data Center

8 mg

Network

47 mg

Device

105 mg

Resource Breakdown

JavaScript

343.7 KB

Images

162.0 KB

CSS

927.3 KB

HTML

35.8 KB

Other

115.8 KB

Green Hosting Verified

Cloudflare

GWF Verified

3 recommendations

•Carbon footprint recommendation preview...

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Security Score

61%Fair

Interactive

HTTPS

WAF

55d

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+H3

Valid From

24.03.2026

Valid Until

22.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

rtl-sdr.com*.rtl-sdr.com

SHA-256 Fingerprint

5C:D2:B7:38:AC:93:A0:EB:A9:B1:37:F7:5D:C3:78:20:8B:00:BD:A5...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-edge-cache

cache,platform=wordpress

cf-ray🇫🇷 Paris

9f306885bae86fe4-CDG

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (5)

alt2.aspmx.l.google.com

alt4.aspmx.l.google.com

alt3.aspmx.l.google.com

aspmx.l.google.com

+1 more

Domain Information

rtl-sdr.com

Domain Age

13 years

Created

09.04.2013

Expires

09.04.2027

Last Updated

10.03.2026

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

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.

61/100

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

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

LeagueGothic + Helvetica Neue

WCAG Partial

77/100

Readability

/30

25/30

15px · LH 1.47

Hierarchy

/20

14/20

4.8x ratio

WCAG

/25

17/25

1.84:1 min contrast

Performance

/25

21/25

System fonts

Heading Font

LeagueGothic

Sans72px

Body Font

Helvetica Neue

Sans15px

Contrast Ratio

1.84:1

37 issues

Reading Comfort

~50 CPL

Optimal (45–75)

72px

13px

15px

⚠️ Small text: 15px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.47 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~50 chars/line (ideal 45–75 CPL).

⚠️ Hard to read: Flesch score 42/100. Simplify sentences for wider reach.

⚠️ Partial contrast: 37 elements below WCAG AA threshold (min 1.8:1).

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

Buy on MyFontsFlesch 42

Color Palette

11 unique colors

8.72:1 AAA Light

#ffffff

Background· 62.5%

#51494c

Other· 3.7%

#a5b7b8

Primary· 5.4%

#142021

Secondary· 4.6%

#5599a6

Secondary· 4.1%

#b59d7c

Secondary· 1.3%

Business & Marketing Stack

4 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

rtl-sdr.com(16)pagead2.googlesyndication.com(2)fd.cleantalk.org(1)moderate.cleantalk.org(1)

Website Identity

rtl-sdr.com

13 years old

Location detected: 🇨🇦 Canadavia ip

NameCheap, Inc.📧 Google Workspaceen-US

Social Profiles

Facebook X (Twitter)GitHub Medium

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Last analyzed: 27 Apr 2026 at 19:59

Historical Analysis & Change Tracking