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

yupoo.com

https://yupoo.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

yupoo.com

Sponsored

Hosting Provider

Tencent Cloud

cloud.tencent.com

IP Address

106.54.33.145

Server Location

🇨🇳 Shanghai, China

ASN

AS45090

Organization

Tencent cloud computing (Beijing) Co., Ltd.

Nameservers

ns1.ialloc.com.ns2.ialloc.com.

Performance

Page Speed

1 KB

37 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Tencent Cloud

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Analytics

CSS Frameworks

Frameworks

SEO Analysis

B70/100

yupoo.comyupoo.com

Yupoo-pictures storage,data transfer,your picture cloud computing s...

Yupoo is also a professional picture hosting service web site, 20 years of professional services, stable, fast, secure, e-commerce sites, shop sellers, the b...

Title truncated. Description truncated.

Title Length82 chars

Recommended: 50-60 chars

Description Length205 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Sponsored

Security Score

31%Critical

Interactive

HTTPS

No WAF

44d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

TrustAsia Technologies, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

02.04.2025

Valid Until

02.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.yupoo.comyupoo.com

SHA-256 Fingerprint

EE:E2:8B:60:AA:0B:91:FA:4C:49:F8:F3:29:11:21:9F:21:58:30:6C...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=utf-8

date

Tue, 17 Feb 2026 17:41:35 GMT

etag

W/"10e50-JhCnfYVTCBIeps4axgTG/P0gsJE"

vary

Accept-Encoding

x-frame-options

SAMEORIGIN

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

yupoo.com

Domain Age

20y 11m

Created

16.03.2005

Expires

16.03.2027

Last Updated

24.12.2025

Registrar

Alibaba Cloud Computing (Beijing) Co., Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Helvetica

86/100

Readability

/30

40/40

24px · LH 1.50

Hierarchy

/20

21/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Helvetica

Sans48px

Body Font

Helvetica

Sans24px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

48px

36px

24px

✅ Excellent readability: 24px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x larger than 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.

✅ Protected text on images: Using gradient for readability.

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

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

s.yupoo.com(3)hm.baidu.com(1)googletagmanager.com(1)

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Last analyzed: 17 Feb 2026 at 17:41

Historical Analysis & Change Tracking