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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viewsonic.com

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

Export

viewsonic.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

54.177.152.131

Server Location

🇺🇸 San Jose, United States

ASN

AS16509

Organization

AWS EC2 (us-west-1)

Server

Nginx

CDN

CloudFront

Nameservers

ns-1558.awsdns-02.co.uk.ns-16.awsdns-02.com.ns-998.awsdns-60.net.ns-1099.awsdns-09.org.

Performance

Page Speed

7.1 MB

250 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Tailwind CSS

CMS

Magento

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Technology Stack

16 Technologies Detected

Libraries

jQuery

jQuery UI

Underscore.js Moment.js

UI Components

Swiper Slick Carousel

CSS Frameworks

Analytics

Customer Support

Icon Libraries

Tag Managers

Reviews

Web Servers

SEO Analysis

B70/100

viewsonic.comviewsonic.com

ViewSonic

ViewSonic Corporation, headquartered in Brea, California, is a leading global provider of computing, consumer electronics, and communications solutions.

Title Length9 chars

Recommended: 50-60 chars

Description Length152 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (63/69)

4 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

59 rules

Sitemap reference found

Allows all crawlers

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Security Score

15%Critical

Critical / Transactional

HTTPS

No WAF

89d

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

15.02.2026

Valid Until

16.05.2026

Subject Alternative Names (1)

www.viewsonic.com

SHA-256 Fingerprint

13:C6:F7:AD:01:3F:23:A6:66:55:C8:30:2D:E8:FF:8F:02:AB:45:54...

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

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, max-age=0)

content-encoding

📦 Gzip(gzip)

content-security-policy-report-only

script-src 'self' 'unsafe-eval' 'unsafe-hashes' 'unsafe-inli...

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

usb-smtp-inbound-1.mimecast.com

usb-smtp-inbound-2.mimecast.com

Domain Information

viewsonic.com

Domain Age

30y 8m

Created

31.05.1995

Expires

30.05.2027

Last Updated

15.02.2022

Registrar

Network Solutions, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

Open Sans

55/100

Readability

/30

32/40

16px · LH 1.38

Hierarchy

/20

13/25

1.62x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Open Sans

Sans26px

Body Font

Open Sans

Sans16px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

26px

48px

24px

15px

16px

Minor Second

Scale

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

✅ Good hierarchy: Clear distinction between headlines and body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ 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.

⚠️ Risky: Text appears on background images without overlay protection.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Customer Support

FreshdeskMid-Market

Live chat and helpdesk tools

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Reviews & Social Proof

YotpoMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

26 Resources

Scripts

Styles

Async

Defer

Top Script Sources

viewsonic.com(15)gstatic.com(1)google.com(1)googletagmanager.com(1)datadoghq-browser-agent.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube TikTok

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Last analyzed: 16 Feb 2026 at 15:39

Historical Analysis & Change Tracking