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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nitrocdn.com

https://nitrocdn.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

nitrocdn.com

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.64.154.105

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

dale.ns.cloudflare.com.violet.ns.cloudflare.com.

Performance

Page Speed

69 KB

19 requests

Image Optimization

Lazy LoadAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

nitropackCustom

Technology Stack

15 Technologies Detected

Plugins

Code Prettify Wpengine Meta Nav Wpengine Analytics

Analytics

Libraries

Other

CSS Frameworks

Icon Libraries

Tag Managers

Customer Support

Marketing

CDN

SEO Analysis

A82/100

nitrocdn.comnitrocdn.com

NitroPack | Site Speed and Performance Optimization Service

NitroPack's the leading site speed and performance service that helps you pass Core Web Vitals, achieve a 90+ PageSpeed score, and increase revenue.

Title Length59 chars

Recommended: 50-60 chars

Description Length148 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (90/100)

1 issues found

Upgrade to view details

Sponsored

Security Score

26%Critical

Interactive

HTTPS

WAF

78d

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/2

Valid From

08.02.2026

Valid Until

09.05.2026

Subject Alternative Names (1)

nitropack.io

SHA-256 Fingerprint

F9:E0:6A:C6:50:1E:09:17:87:43:F8:E4:10:69:21:17:52:02:A3:C2...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

date

Thu, 19 Feb 2026 15:28:09 GMT

content-type

text/html; charset=UTF-8

cf-ray🇩🇪 Frankfurt

9d06cadc4ebcd2bf-FRA

vary

Accept-Encoding, Cookie

accept-ch

Sec-CH-UA-Mobile

link

<https://cdn-iledogo.nitrocdn.com>; rel=preconnect

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

nitrocdn.com

Domain Age

5y 10m

Created

09.04.2020

Expires

09.04.2026

Last Updated

05.03.2025

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Inter + sans-serif

60/100

Readability

/30

17/40

14px · LH 1.14

Hierarchy

/20

25/25

3.43x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Inter

Sans48px

Body Font

sans-serif

Sans14px

Contrast Ratio

Reading Comfort

~92 CPL

Needs attention

48px

16px

32px

14px

Minor Third

Scale

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

⚠️ Tight line spacing (1.14). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 3.4x 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.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

5 Resources

Scripts

Styles

Async

Defer

Top Script Sources

nitroscripts.com(1)

Website Identity

nitrocdn.com

5 years old

Amazon Registrar, Inc.

Social Profiles

Facebook X (Twitter)LinkedIn YouTube

Sponsored

Last analyzed: 19 Feb 2026 at 15:28

Historical Analysis & Change Tracking