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rosenzweig.io

https://rosenzweig.io· First analyzed 30 May 2026· Updated 30 May 2026
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rosenzweig.io
Desktop screenshot of rosenzweig.io
Mobile screenshot of rosenzweig.io
Mobile

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Hosting Provider

FullHost

IP Address

162.223.228.62

Site Location

🇨🇦 Canadavia ip

Server Location

🇨🇦 Toronto, Canada

ASN

AS39962

Organization

FullHost

Server

Nginx

Nameservers

gay5bmuy.ns2.migadu.com.gay5bmuy.ns1.migadu.com.gay5bmuy.ns0.migadu.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
297 ms10%
Speed Index
386 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
68 KB
2 requests

Image Optimization

AVIF
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
FullHost

Technology Stack

1 Technologies Detected

Web Servers

1
Nginx

SEO Analysis

D56/100
17
7
1
Meta Tags4/15
Content10/12
Headings6/8
Technical13/25
E-E-A-T0/7
Images5/7
Links5/5
URL5/5
Social1/5
Freshness0/4
Mobile4/4
Indexability3/3
R
rosenzweig.iorosenzweig.io

Alyssa Rosenzweig

No description available for this page.

Title Length17 chars

Recommended: 50-60 chars (~103px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

  • • Missing meta description — important for click-through rates in SERPs

8 issues found

Upgrade to view details

Crawlability

Sitemap
robots.txt

8 rules

Local SEO

Local Search Readiness

3/100
Poor
1 14 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

D41/100
Bot Access
20/25
Machine Read.
13/25
Schema Data
0/25
Citation
8/25

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:35%
Words:732
Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary29w
Descriptive Headings
Canonical URL
Open Graph1/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (9)
AI readiness recommendation preview...
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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.
B
76/100
10
Passed
2
Critical
0
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
16/20
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
9/15
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.
1 recommendation
  • •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.
66/100
A+
9 mg
CO₂e / view
68.4 KB
Page Weight
95%
Cleaner Than
New Visitor
10 mg
vs
Returning (cached)
5 mg
Annual (10K/mo)
1.0 kg
Emission Segments
Data Center
2 mg
Network
2 mg
Device
5 mg
Resource Breakdown
Images
62.6 KB
HTML
5.8 KB
Green Hosting Not Verified
FullHost
3 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
B

Security Score

71%Good
Static / Informational

HTTPS

No WAF

54d

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/1.1

Valid From

24.04.2026

Valid Until

23.07.2026

Subject Alternative Names (8)

alyssarosenzweig.carosenz.carosenzweig.iova3rzg.cawww.alyssarosenzweig.cawww.rosenz.cawww.rosenzweig.iowww.va3rzg.ca

SHA-256 Fingerprint

11:F7:B2:EA:38:4A:70:B8:5A:27:F5:88:0D:E1:39:9D:7B:F8:E7:1F...

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

connection
keep-alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=utf-8
date
Sat, 30 May 2026 00:44:12 GMT
etag
W/"69b0c3e8-3175"
last-modified
Wed, 11 Mar 2026 01:22:48 GMT
Good Warning Issue

Email Infrastructure

Migadu

Score

73

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

aspmx1.migadu.com
aspmx2.migadu.com

Domain Information

rosenzweig.io

Domain Age
9y 8m

Created

15.09.2016

Expires

15.09.2026

Last Updated

21.08.2025

Registrar

NameCheap, Inc.

DNSSEC
Not Enabled

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
65/100
Mobile Friendly2 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
1 recommendation
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Cantarell

WCAG AAA
80/100
Readability
/30
24/30

19px · LH 1.60

Hierarchy
/20
20/20

2.7x ratio · ✓ H1→H6

WCAG
/25
20/25

9.4:1 min contrast

Performance
/25
16/25

1 font

Heading Font

Cantarell

Sans52px

Body Font

Cantarell

Sans19px

Contrast Ratio

9.4:1

WCAG AAA (≥7:1)

Reading Comfort

~32 CPL

Narrow lines
52px
h1
19px
p

✅ Excellent readability: 19px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

✅ WCAG AAA contrast: All text meets 7:1 ratio (min 9.4:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 2.7x larger than body text.

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

Buy on MyFontsFlesch 53

Color Palette

9 unique colors
11.72:1 AAA Light
#ffffff
Background· 84.2%
#3c3736
Other· 2%
#b09b9a
Primary· 1.7%
#211412
Secondary· 1.6%
#9d3450
Secondary· 1.1%

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

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Website Identity

rosenzweig.io

9 years old
Location detected: 🇨🇦 Canadavia ip
NameCheap, Inc.📧 Migaduen

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Last analyzed: 30 May 2026 at 00:45

Historical Analysis & Change Tracking

rosenzweig.io Technology Stack - Built With Nginx | StackOptic | StackOptic