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

thanhnien.vn

https://thanhnien.vn· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

thanhnien.vn

Sponsored

Hosting Provider

VNPT

IP Address

14.225.199.151

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS135905

Organization

VNPT

Server

Nginx

CDN

Cloudflare

WAF

Cloudflare

Nameservers

uma.ns.cloudflare.com.tom.ns.cloudflare.com.

Performance

Page Speed

1.7 MB

250 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

VNPT

CDN

Cloudflare

Progressive Web App

Service Worker

Detected API Sources

https://avivid.likr.tw/api/gtm...

Technology Stack

10 Technologies Detected

Analytics

Libraries

CSS Frameworks

Tag Managers

Advertising

Web Servers

Customer Support

CDN

SEO Analysis

B76/100

thanhnien.vnthanhnien.vn

Tin tức 24h mới nhất, tin nhanh, tin nóng hàng ngày | Báo Thanh Niên

Tin tức 24h, đọc báo TN cập nhật tin nóng online Việt Nam và thế giới mới nhất trong ngày, tin nhanh thời sự, chính trị, xã hội hôm nay, tin tức, top news VN

Title Length68 chars

Recommended: 50-60 chars

Description Length157 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag - every page should have one H1

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1,063 URLs

robots.txt

6 rules

Sitemap reference found

Sponsored

Security Score

73%Good

Static / Informational

HTTPS

No WAF

186d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

22.07.2025

Valid Until

23.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.thanhnien.vnthanhnien.vn

SHA-256 Fingerprint

DB:70:9D:B0:7B:02:68:B3:1C:5E:88:B4:70:D9:CF:80:26:4E:71:36...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-cache, private)

content-encoding

📦 Gzip(gzip)

content-length

58434

content-type

text/html; charset=utf-8

crc32

0ee0c820

date

Wed, 18 Feb 2026 04:54:58 GMT

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

MX Records (5)

alt4.aspmx.l.google.com

alt3.aspmx.l.google.com

alt1.aspmx.l.google.com

alt2.aspmx.l.google.com

+1 more

Domain Information

thanhnien.vn

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Merriweather

60/100

Readability

/30

32/40

14px · LH 1.43

Hierarchy

/20

25/25

2x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Merriweather

Serif28px

Body Font

Merriweather

Serif14px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

28px

21px

16px

14px

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

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

✅ Good performance: Using 1 font families keeps load times fast.

✅ 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.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Facebook PixelMid-Market

Ad platforms and retargeting pixels

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

media1.admicro.vn(20)

Website Identity

Facebook YouTube TikTok

Sponsored

Last analyzed: 18 Feb 2026 at 04:55

Historical Analysis & Change Tracking