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

youdao.com

https://youdao.com· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

youdao.com

Mobile

Sponsored

Hosting Provider

China Unicom Network

IP Address

220.197.31.37

Server Location

🇨🇳 Guiyang, China

ASN

AS4837

Server

YDWS

Nameservers

rem3.yodao.net.rem1.yodao.net.rem2.yodao.net.

Performance

Page Speed

2.3 MB

56 requests

0–49

50–89

90–100

Architecture Stack

Hybrid

⚙️ SSR

Frontend

Framework

Nuxt.js

Infrastructure

Hosting

China Unicom Network

Technology Stack

4 Technologies Detected

Meta Frameworks

UI Components

Other

CSS Frameworks

SEO Analysis

F23/100

youdao.comyoudao.com

网易有道

网易有道是中国领先的智能学习公司，致力于提供100%以用户为导向的学习产品和服务。有道成立于2006年，打造了一系列深受用户喜欢的口碑型大众学习工具产品，例如：网易有道词典、有道精品课、有道翻译官、有道云笔记等。2014年，网易有道宣布正式进军互联网教育行业。2018年4月，网易有道完成首次战略融资，投后估值11...

Description truncated.

Title Length4 chars

Recommended: 50-60 chars

Description Length219 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (25/25)

8 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

187 rules

Allows all crawlers

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

260d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

30.09.2025

Valid Until

31.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.youdao.comyoudao.com

SHA-256 Fingerprint

25:54:1A:0C:06:8E:D9:AD:05:7E:9E:82:42:27:36:34:00:34:3F:2E...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

none

connection

keep-alive

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=utf-8

date

Fri, 13 Feb 2026 08:48:16 GMT

etag

"47cee-RX5eLfqAK6JOJukNHzoCerZyF/I"

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

hzmx02.mxmail.netease.com

hzmx01.mxmail.netease.com

Domain Information

youdao.com

Domain Age

23y 8m

Created

15.06.2002

Expires

15.06.2027

Last Updated

19.05.2025

Registrar

Alibaba Cloud Computing (Beijing) Co., Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Poppins

41/100

Readability

/30

32/40

14px · LH 1.50

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Poppins

Body Font

Poppins

Sans14px

Contrast Ratio

Reading Comfort

Single Family

left aligned

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ 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.

⚠️ 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

15 Resources

Scripts

Styles

Async

Defer

Top Script Sources

shared.ydstatic.com(14)

Sponsored

Last analyzed: 13 Feb 2026 at 08:48

Historical Analysis & Change Tracking