What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

physicsworld.com

https://physicsworld.com· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

physicsworld.com

Sponsored

Hosting Provider

Kinsta

cloudflare.com

IP Address

162.159.135.42

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-440.awsdns-55.com.ns-790.awsdns-34.net.ns-1062.awsdns-04.org.ns-1680.awsdns-18.co.uk.

Performance

Page Speed

1.6 MB

115 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9

cms

PhysicsWorldv1.0.0

by 93digital

View Theme

Progressive Web App

Service Worker

Technology Stack

20 Technologies Detected

Analytics

Plugins

Brightcove Video Connect Onesignal Free Web Push Notifications Leaky Paywall

Meta Frameworks

Libraries

UI Components

CSS Frameworks

Icon Libraries

Fonts

Adobe Fonts (Typekit)

Tag Managers

Advertising

CDN

Languages

Customer Support

SEO Analysis

A82/100

physicsworld.comphysicsworld.com

Home – Physics World

Physics World represents a key part of IOP Publishing's mission to communicate world-class research and innovation to the widest possible audience. The websi...

Description truncated.

Title Length20 chars

Recommended: 50-60 chars

Description Length302 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

4 rules

Sponsored

Security Score

25%Critical

Critical / Transactional

HTTPS

WAF

78d

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

05.02.2026

Valid Until

06.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

physicsworld.com*.physicsworld.com

SHA-256 Fingerprint

12:F3:22:21:78:31:FD:CA:61:2B:C1:9C:DD:7B:49:D7:86:EB:A6:04...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cf054bb3be1dc68-FRA

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Mon, 16 Feb 2026 22:02:44 GMT

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

eu-smtp-inbound-1.mimecast.com

eu-smtp-inbound-2.mimecast.com

Domain Information

physicsworld.com

Domain Age

29y 5m

Created

18.09.1996

Expires

17.09.2026

Last Updated

24.11.2024

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner

CookieYes

GDPR Indicators

Cookie consent banner detected

CMP: CookieYes

Typography & Readability

Arial

63/100

Readability

/30

32/40

16px · LH 1.25

Hierarchy

/20

8/25

1x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Arial

Sans16px

Body Font

Arial

Sans16px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

16px

32px

24px

20px

16px

Minor Third

Scale

✅ Excellent readability: 16px body text is ideal for all devices.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ Good performance: Using 2 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 75 elements lack adequate spacing.

AAdobe Fonts Buy on MyFonts

Business & Marketing Stack

6 Tools Detected

Advanced

Behavior Analytics

HotjarMid-Market

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

CookieYesSMB

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

25 Resources

Scripts

Styles

Async

Defer

Top Script Sources

physicsworld.com(8)cdn-cookieyes.com(2)googletagmanager.com(2)cdn.onesignal.com(2)securepubads.g.doubleclick.net(2)

Website Identity

physicsworld.com

29 years old

Amazon Registrar, Inc.📧 Mimecast

Social Profiles

Facebook LinkedIn Bluesky

Sponsored

Last analyzed: 16 Feb 2026 at 22:03

Historical Analysis & Change Tracking