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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fontsquirrel.com

https://fontsquirrel.com· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

fontsquirrel.com

Mobile

Sponsored

Hosting Provider

Linode (Akamai)

linode.com

IP Address

45.79.150.110

Server Location

🇺🇸 Cedar Knolls, United States

ASN

AS63949

Organization

Linode

Server

Nginx

CDN

CloudFront

Nameservers

ns3.linode.com.ns1.linode.com.ns2.linode.com.ns5.linode.com.+1 more

Performance

Page Speed

1.1 MB

250 requests

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Linode (Akamai)

CDN

CloudFront

Progressive Web App

Web ManifestApple Touch IconTheme Color

Detected API Sources

https://sync.kueezrtb.com/api/...

Technology Stack

16 Technologies Detected

Advertising

Google Ads Criteo Taboola Outbrain

Analytics

Frameworks

Libraries

CSS Frameworks

Icon Libraries

Fonts

Payments

Social

Comments

Personalization

Web Servers

SEO Analysis

B76/100

fontsquirrel.comfontsquirrel.com

Free Fonts! Legit Free & Quality | Font Squirrel

Font Squirrel scours the internet for high quality, legitimately free fonts . Download thousands of completely legal, high quality, free fonts.

Title Length48 chars

Recommended: 50-60 chars

Description Length143 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Sponsored

Security Score

40%Poor

Critical / Transactional

HTTPS

No WAF

76d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

02.04.2025

Valid Until

01.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

fontsquirrel.com*.fontsquirrel.com

SHA-256 Fingerprint

14:D6:AF:FA:8A:7E:CF:F9:35:9B:E6:FB:07:52:0E:4E:20:60:AA:B6...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store)

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self';

content-type

text/html; charset=UTF-8

date

Sat, 14 Feb 2026 14:34:52 GMT

server

nginx

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

mail.fontsquirrel.com

Domain Information

fontsquirrel.com

Domain Age

17y 1m

Created

09.01.2009

Expires

09.01.2027

Last Updated

05.12.2025

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

CookieYes

Cookie Consent Banner

CookieYes

GDPR Indicators

Cookie consent banner detected

CMP: CookieYes

Data Protection Officer mentioned

Legitimate interest basis mentioned

Typography & Readability

fjallaone + body_font

73/100

Readability

/30

32/40

16px · LH 1.38

Hierarchy

/20

18/25

2.81x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

fjallaone

Sans45px

Body Font

body_font

Sans16px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

45px

14px

18px

16px

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

✅ Strong hierarchy: Headlines are 2.8x 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.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 20 elements lack adequate spacing.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Privacy & Cookies

CookieYesSMB

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(2)securepubads.g.doubleclick.net(2)fundingchoicesmessages.google.com(2)script.4dex.io(1)cdn-cookieyes.com(1)

Website Identity

Facebook X (Twitter)

Sponsored

Last analyzed: 14 Feb 2026 at 14:35

Historical Analysis & Change Tracking