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

zhidao.baidu.com

https://zhidao.baidu.com· First analyzed 12 Feb 2026· Updated 12 Feb 2026

Export

zhidao.baidu.com

Mobile

Sponsored

Hosting Provider

Beijing Baidu Netcom Science and Technology Co., Ltd.

IP Address

180.76.11.175

Server Location

🇨🇳 Beijing, China

ASN

AS55967

Organization

Beijing Baidu Netcom Science and Technology Co., Ltd.

Server

Nginx

Performance

Page Speed

74 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Beijing Baidu Netcom Science and Technology Co., Ltd.

Technology Stack

3 Technologies Detected

Libraries

jQuery

CSS Frameworks

Tailwind CSS

Web Servers

Nginx

SEO Analysis

F23/100

zhidao.baidu.comzhidao.baidu.com

百度知道 - 全球领先中文互动问答平台

百度知道是全球领先的中文问答互动平台，每天为数亿网民答疑解惑。百度知道通过AI技术实现智能检索和智能推荐，让您的每个疑问都能够快速获得有效解答。

Title Length19 chars

Recommended: 50-60 chars

Description Length72 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (26/26)
• Missing viewport meta tag - page may not be mobile-friendly

9 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

40 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

178d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

09.07.2025

Valid Until

10.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (20)

baidu.combaifubao.comwww.baidu.cnwww.baidu.com.cnmct.y.nuomi.comapollo.autodwz.cn*.baidu.com+12 more

SHA-256 Fingerprint

0D:82:2C:9A:90:5A:EF:E9:8F:37:12:C0:E0:26:30:EE:95:33:2C:45...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-headers

X-ik-ssl, X-ik-token, X-ik-utdata, X-ik-appid, X-ik-cuid, X-...

connection

keep-alive

content-encoding

⚡ Brotli(br)

content-type

text/html

date

Thu, 12 Feb 2026 23:36:36 GMT

not-try

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

zhidao.baidu.com

Domain Age

26y 4m

Created

11.10.1999

Expires

11.10.2028

Last Updated

08.04.2025

Registrar

MarkMonitor Information Technology (Shanghai) Co., Ltd.

DNSSEC

Not Enabled

Typography & Readability

PingFangSC-Medium

39/100

Readability

/30

40/40

20px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

PingFangSC-Medium

Body Font

PingFangSC-Medium

Sans20px

Contrast Ratio

Reading Comfort

~211 CPL

Needs attention

20px

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good performance: Using 2 font families keeps load times fast.

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

❌ Very long lines: ~211 chars/line causes eye strain. Use max-width: 65ch.

⚠️ Cramped layout: 10 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

iknow-zhidao.bdimg.com(18)hm.baidu.com(1)fex.bdstatic.com(1)

Sponsored

Last analyzed: 12 Feb 2026 at 23:37

Historical Analysis & Change Tracking