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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movie.douban.com

https://movie.douban.com· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

movie.douban.com

Mobile

Sponsored

Hosting Provider

Tencent Cloud

cloud.tencent.com

IP Address

140.143.177.206

Server Location

🇨🇳 Beijing, China

ASN

AS45090

Organization

Tencent cloud computing (Beijing) Co., Ltd.

Server

dae

Performance

Page Speed

1.2 MB

219 requests

Image Optimization

Lazy LoadWebP

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

React

Infrastructure

Hosting

Tencent Cloud

Technology Stack

11 Technologies Detected

Libraries

Analytics

Advertising

Google Ads Google AdSense

Frameworks

CSS Frameworks

Icon Libraries

Fonts

Other

SEO Analysis

D47/100

movie.douban.commovie.douban.com

豆瓣电影

豆瓣电影提供最新的电影介绍及评论包括上映影片的影讯查询及购票服务。你可以记录想看、在看和看过的电影电视剧，顺便打分、写影评。根据你的口味，豆瓣电影会推荐好电影给你。

Title Length4 chars

Recommended: 50-60 chars

Description Length82 chars

Recommended: 120-160 chars

Issues (1)

• Missing viewport meta tag - page may not be mobile-friendly

8 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

35 rules

Sitemap reference found

Sponsored

Security Score

46%Poor

Interactive

HTTPS

No WAF

165d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

31.07.2025

Valid Until

30.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

*.douban.com

SHA-256 Fingerprint

51:51:A4:13:AE:63:4A:92:4E:3F:3E:C7:A2:A2:BB:3B:A5:34:45:40...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(must-revalidate, no-cache, private)

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=utf-8

date

Sun, 15 Feb 2026 09:37:52 GMT

expires

Sun, 1 Jan 2006 01:00:00 GMT

pragma

no-cache

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

movie.douban.com

Domain Age

21y 5m

Created

19.09.2004

Expires

19.09.2027

Last Updated

29.12.2025

Registrar

Alibaba Cloud Computing (Beijing) Co., Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Legitimate interest basis mentioned

Typography & Readability

Open Sans + Helvetica

62/100

Readability

/30

40/40

24px · LH 1.62

Hierarchy

/20

15/25

0.73x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

17/20

System fonts

Heading Font

Open Sans

Sans18px

Body Font

Helvetica

Sans24px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

18px

16px

18px

24px

Minor Second

Scale

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

✅ Optimal line spacing: 1.62 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

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

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

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

GGoogle Fonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Matomo (Piwik)Mid-Market

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

A/B Testing & Optimization

VWO (Visual Website Optimizer)Mid-Market

Experimentation and conversion optimization

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

img1.doubanio.com(7)img3.doubanio.com(4)pagead2.googlesyndication.com(2)fundingchoicesmessages.google.com(2)ssl.google-analytics.com(1)

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Last analyzed: 15 Feb 2026 at 09:38

Historical Analysis & Change Tracking