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

tdk.com

https://tdk.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

tdk.com

Mobile

Sponsored

Hosting Provider

Internet Initiative Japan Inc.

IP Address

202.238.239.243

Server Location

🇯🇵 Meguro City, Japan

ASN

AS2497

Server

Nginx

CDN

Akamai

WAF

Akamai

Nameservers

ns-578.awsdns-08.net.ns-1271.awsdns-30.org.ns-1942.awsdns-50.co.uk.ns-345.awsdns-43.com.

Performance

Page Speed

2 MB

68 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

11 Technologies Detected

Icon Libraries

Font Awesome Material Icons

Libraries

Other

UI Components

Other

CSS Frameworks

Analytics

Tag Managers

Web Servers

Customer Support

SEO Analysis

C67/100

tdk.comtdk.com

TDK Corporation | TDK

Welcome to TDK corporate website. TDK is the world’s leading electronic components and devices company that has the high magnetics technology. We contribute ...

Description truncated.

Title Length21 chars

Recommended: 50-60 chars

Description Length310 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (41/49)

4 issues found

Upgrade to view details

Sponsored

Security Score

81%Very Good

Interactive

HTTPS

WAF

352d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

Valid From

05.02.2026

Valid Until

04.02.2027

OCSP Stapling

Enabled

Subject Alternative Names (20)

www.tdk.comad.tdk.comelectronica-qa.tdk.comelectronica.tdk.commytdk-dev.tdk.cnmytdk-dev.tdk.commytdk-stage.tdk.cnmytdk-stage.tdk.com+12 more

SHA-256 Fingerprint

85:32:F7:DE:19:C6:5D:05:2F:26:AF:9C:F4:B6:9B:88:B3:5B:87:D7...

Upgrade to view header details

HTTP Headers

Developer Console

server

nginx

content-type

text/html; charset=UTF-8

x-drupal-dynamic-cache

UNCACHEABLE (poor cacheability)

content-language

x-content-type-options

nosniff

x-frame-options

ALLOW-FROM https://www.tdk.cn

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mxa-00549401.gslb.pphosted.com

mxb-00549401.gslb.pphosted.com

Domain Information

tdk.com

Domain Age

29y 6m

Created

07.08.1996

Expires

06.08.2027

Last Updated

12.11.2023

Registrar

Japan Registry Services Co., Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Noto Sans + sans-serif

41/100

Readability

/30

5/40

12px · LH 1.00

Hierarchy

/20

18/25

5.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Noto Sans

Sans64px

Body Font

sans-serif

Sans12px

Contrast Ratio

Reading Comfort

~89 CPL

Needs attention

64px

20px

12px

❌ Critical: 12px body text is too small. Increase to at least 14px.

⚠️ Tight line spacing (1.00). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 5.3x 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

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(13)skynettechnologies.com(2)googletagmanager.com(1)s.go-mpulse.net(1)code.jquery.com(1)

Website Identity

X (Twitter)Instagram LinkedIn YouTube

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Last analyzed: 17 Feb 2026 at 08:51

Historical Analysis & Change Tracking