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.

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iframe.ly

https://iframe.ly· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

iframe.ly

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

13.248.132.76

Server Location

🇨🇦 Montreal, Canada

ASN

AS16509

Organization

AWS Global Accelerator (GLOBAL)

Server

Nginx

Nameservers

ns-1365.awsdns-42.org.ns-1955.awsdns-52.co.uk.ns-47.awsdns-05.com.ns-658.awsdns-18.net.

Performance

Page Speed

464 KB

67 requests

Image Optimization

WebPAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

Svelte

Infrastructure

Hosting

Amazon Web Services (AWS)

Technology Stack

7 Technologies Detected

Meta Frameworks

Analytics

Frameworks

CSS Frameworks

Web Servers

SEO Analysis

A84/100

iframe.lyiframe.ly

Embeds codes for today's Internet - Iframely

Iframely gives you simple APIs to have all the Web's best media on your site and on all your users' devices.

Title Length44 chars

Recommended: 50-60 chars

Description Length108 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

9 rules

Sponsored

Security Score

76%Good

Static / Informational

HTTPS

No WAF

78d

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

06.02.2026

Valid Until

07.05.2026

Subject Alternative Names (2)

*.iframely.comiframely.com

SHA-256 Fingerprint

A8:E6:14:7E:0A:CE:C4:7D:C8:B1:53:72:50:FD:9A:76:02:28:60:4B...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

⚪ Custom(must-revalidate)

content-encoding

⚡ Brotli(br)

content-length

79059

content-type

text/html;charset=utf-8

date

Tue, 17 Feb 2026 23:27:01 GMT

etag

W/"79059-1770928140562"

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

aspmx2.googlemail.com

aspmx.l.google.com

alt1.aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

iframe.ly

Domain Age

5y 4m

Created

19.10.2020

Expires

14.02.2027

Last Updated

19.01.2026

Registrar

Libyan Spider Network (int)

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Martian Grotesk + Inter

88/100

Readability

/30

40/40

20px · LH 1.50

Hierarchy

/20

25/25

2.4x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Martian Grotesk

Sans48px

Body Font

Inter

Sans20px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

48px

28px

20px

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

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.4x larger than body text.

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

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

⚠️ Cramped layout: 17 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(1)

Website Identity

X (Twitter)GitHub

Sponsored

Last analyzed: 17 Feb 2026 at 23:27

Historical Analysis & Change Tracking