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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kenh14.vn

https://kenh14.vn· First analyzed 26 Apr 2026· Updated 26 Apr 2026

Export

kenh14.vn

Mobile

Sponsored

Hosting Provider

VNPT

IP Address

14.225.10.15

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS135905

Organization

VNPT

Server

OpenResty

Nameservers

ns8.synerfy.vn.ns6.synerfy.vn.ns7.synerfy.vn.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

390 ms10%

Speed Index

507 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

13.5 MB

250 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

VNPT

Progressive Web App

Service Worker

Technology Stack

8 Technologies Detected

Analytics

Google Analytics

Facebook Pixel Segment

UI Components

CSS Frameworks

Icon Libraries

Tag Managers

Web Servers

SEO Analysis

B79/100

Meta Tags14/15

Content10/12

Headings3/8

Technical23/25

E-E-A-T5/7

Images7/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile1/4

Indexability3/3

kenh14.vnkenh14.vn

Kênh tin tức giải trí - Xã hội - Kenh14.vn

Trang tin tức giải trí - xã hội Việt Nam - Quốc Tế. Đưa tin nhanh nhất : thời trang, video ngôi sao, phim ảnh, tình yêu, học đường, các chuyển động xã hội.

Title Length42 chars

Recommended: 50-60 chars (~247px / 580px)

Description Length155 chars

Recommended: 120-160 chars

Issues (1)

• Missing H1 tag — every page should have exactly one H1

7 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

747 URLs

747 sub-sitemaps

robots.txt

11 rules

Sitemap reference found

Local SEO

Local Search Readiness

30/100

Needs Work

9 12

Sponsored

AI & LLM Readiness

D43/100

Bot Access

20/25

Machine Read.

1/25

Schema Data

6/25

Citation

16/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:4%

Words:3,173

Token eff.:Poor Structure

Structured Data

2 JSON-LD

Organization×1.1WebSite

sameAs entity links

Citation Readiness

Opening Summary1514w

Descriptive Headingsavg 16.6w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

Upgrade to view recommendations

Sponsored

Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

71/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

11/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

15/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

9/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

1/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

1 recommendation

•Accessibility recommendation preview...

Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

23/100

1.71 g

CO₂e / view

13.5 MB

Page Weight

Cleaner Than

New Visitor

1.95 g

Returning (cached)

976 mg

Annual (10K/mo)

204.9 kg

Emission Segments

Data Center

381 mg

Network

410 mg

Device

916 mg

Resource Breakdown

JavaScript

206.1 KB

Images

12.6 MB

CSS

683.1 KB

HTML

63.8 KB

Other

3.3 KB

Green Hosting Not Verified

VNPT

8 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

71%Good

Static / Informational

HTTPS

No WAF

306d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

06.02.2026

Valid Until

27.02.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.kenh14.vnkenh14.vn

SHA-256 Fingerprint

76:E9:20:F2:3C:36:AF:60:A6:70:01:A1:2C:83:8C:1E:B7:3E:1D:CC...

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

64989

content-type

text/html; charset=utf-8

date

Sun, 26 Apr 2026 15:40:53 GMT

filterid

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (7)

aspmx5.googlemail.com

alt2.aspmx.l.google.com

aspmx2.googlemail.com

aspmx.l.google.com

+3 more

Domain Information

kenh14.vn

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Cookie consent banner detected

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

65/100

Mobile Friendly1 breakpoint

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1, maximum-scale=5, minimal-ui

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Arial

WCAG Partial

60/100

Readability

/30

21/30

14px · LH 1.43

Hierarchy

/20

7/20

1.14x ratio

WCAG

/25

16/25

1.11:1 min contrast

Performance

/25

16/25

System fonts

Heading Font

Arial

Sans16px

Body Font

Arial

Sans14px

Contrast Ratio

1.11:1

21 issues

Reading Comfort

~59 CPL

Optimal (45–75)

16px

14px

Minor Second

Scale

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~59 chars/line (ideal 45–75 CPL).

✅ Easy to read: Flesch score 89/100 — accessible to general audiences.

⚠️ Partial contrast: 21 elements below WCAG AA threshold (min 1.1:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

Flesch 89

Color Palette

13 unique colors

16.12:1 AAA Light

#ffffff

Background· 46.1%

#242020

Other· 3.1%

#f0a62b

Primary· 8.9%

#100e0c

Secondary· 6.1%

#9f181c

Accent· 5.6%

#7e5744

Secondary· 4.9%

#323329

Secondary· 4.9%

#8f8a76

Secondary· 4.2%

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Google AdsEnterprise

Ad platforms and retargeting pixels

Social Media

Facebook SDKFree

LinkedIn WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

23 Resources

Scripts

Styles

Async

Defer

Top Script Sources

media1.admicro.vn(12)kenh14cdn.com(2)googletagmanager.com(1)static.trunkpkg.com(1)deqik.com(1)

Website Identity

https://kenh14.vn

Organization

bandoc@kenh14.vn

Tầng 21, tòa nhà Center Building, Hapulico Complex, số 1 Nguyễn Huy Tưởng, p. Thanh Xuân Trung, quận Thanh Xuân

100000, Hà Nội

Việt Nam

Location detected: 🇻🇳 Vietnamvia tld

📧 Google Workspacevi

Social Profiles

Facebook

Sponsored

Last analyzed: 26 Apr 2026 at 15:41

Historical Analysis & Change Tracking