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

rufus.ie

https://rufus.ie· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

rufus.ie

Mobile

Sponsored

Hosting Provider

GitHub Pages

pages.github.com

IP Address

185.199.111.153

Server Location

🇺🇸 San Francisco, United States

ASN

AS54113

Organization

GitHub, Inc

Server

GitHub.com

CDN

Fastly

Nameservers

ns4.blacknight.com.ns2.blacknight.com.ns3.blacknight.com.ns1.blacknight.com.

Performance

Page Speed

704 KB

21 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

GitHub Pages

CDN

Fastly

Technology Stack

11 Technologies Detected

Advertising

Google Ads Google AdSense Criteo Outbrain

CSS Frameworks

Analytics

Icon Libraries

Fonts

Payments

SEO Analysis

D58/100

rufus.ierufus.ie

Rufus - Create bootable USB drives the easy way

Rufus: Create bootable USB drives the easy way

Title Length47 chars

Recommended: 50-60 chars

Description Length46 chars

Recommended: 120-160 chars

Issues (0)

6 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

34d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

23.12.2025

Valid Until

23.03.2026

Subject Alternative Names (1)

rufus.ie

SHA-256 Fingerprint

AC:36:9C:13:2D:A1:D3:19:BE:59:FF:A4:07:D0:8B:55:0E:73:6C:7B...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-origin

age

542

cache-control

🟡 600s(max-age=600)

content-encoding

📦 Gzip(gzip)

content-length

874

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

rufus.ie

DNSSEC

Not Enabled

Privacy & Compliance

Quantcast Choice

Cookie Consent Banner

Quantcast Choice

GDPR Indicators

Cookie consent banner detected

CMP: Quantcast Choice

Legitimate interest basis mentioned

Typography & Readability

Helvetica

75/100

Readability

/30

30/40

16px · LH --

Hierarchy

/20

25/25

3.8x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Helvetica

Sans61px

Body Font

Helvetica

Sans16px

Contrast Ratio

Reading Comfort

~80 CPL

Needs attention

61px

24px

16px

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

✅ Strong hierarchy: Headlines are 3.8x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Wide lines: ~80 chars/line. Consider max-width for better reading flow.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Enterprise

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

pagead2.googlesyndication.com(3)fundingchoicesmessages.google.com(2)googletagmanager.com(1)cdn.jsdelivr.net(1)

Website Identity

GitHub

Sponsored

Last analyzed: 16 Feb 2026 at 12:52

Historical Analysis & Change Tracking