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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softether-download.com

https://softether-download.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

Mobile

Sponsored

Hosting Provider

TOKAI Communications Corporation

IP Address

27.121.46.57

Server Location

🇯🇵 Atsugi, Japan

ASN

AS10010

Organization

TOKAI Communications Corporation

Server

Microsoft IIS

Nameservers

nsj.tennoudai.net.nsk.tennoudai.net.nsu.tennoudai.net.nsi.tennoudai.net.

Performance

Page Speed

59 KB

5 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

TOKAI Communications Corporation

Technology Stack

4 Technologies Detected

Analytics

Web Servers

Frameworks

SEO Analysis

F29/100

softether-download.comsoftether-download.com

SoftEther Download Center

No description available for this page.

Title Length25 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Missing viewport meta tag - page may not be mobile-friendly

8 issues found

Upgrade to view details

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

71d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

30.01.2026

Valid Until

30.04.2026

Subject Alternative Names (2)

*.softether-download.comsoftether-download.com

SHA-256 Fingerprint

2C:4D:36:25:8B:5C:D6:3E:69:63:A0:3E:D1:B8:DC:9A:4A:D0:E6:73...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟣 Private(private)

content-length

7140

content-type

text/html; charset=utf-8

date

Wed, 18 Feb 2026 02:05:10 GMT

server

Microsoft-IIS/8.0

x-aspnet-version

4.0.30319

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

Domain Information

softether-download.com

Domain Age

13 years

Created

13.02.2013

Expires

13.02.2027

Last Updated

13.02.2026

Registrar

Japan Registry Services Co., Ltd.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Typography & Readability

Segoe UI Light + Segoe UI

58/100

Readability

/30

20/40

13px · LH 1.60

Hierarchy

/20

18/25

2.2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Segoe UI Light

Sans29px

Body Font

Segoe UI

Sans13px

Contrast Ratio

Reading Comfort

~130 CPL

Needs attention

29px

13px

❌ Critical: 13px body text is too small. Increase to at least 14px.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.2x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

❌ Very long lines: ~130 chars/line causes eye strain. Use max-width: 65ch.

⚠️ Cramped layout: 7 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

2 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(1)

Website Identity

GitHub

Sponsored

Last analyzed: 18 Feb 2026 at 02:05

Historical Analysis & Change Tracking