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

astm.org

https://astm.org· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

astm.org

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

65.8.131.8

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

CDN

CloudFront

Nameservers

udns1.cscdns.net.udns2.cscdns.uk.

Performance

Page Speed

4.8 MB

97 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

Styling

Tailwind CSS

CMS

Magento

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

10 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Hotjar

Fonts

Adobe Fonts (Typekit)Adobe Fonts

Meta Frameworks

CSS Frameworks

Icon Libraries

Tag Managers

Advertising

SEO Analysis

B76/100

astm.orgastm.org

ASTM International | ASTM

Over 13,000 ASTM standards operate globally. Defined and set by us, they improve the lives of millions every day. ASTM provides the standards and solutions y...

Description truncated.

Title Length25 chars

Recommended: 50-60 chars

Description Length231 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

5 URLs

robots.txt

5 rules

Sitemap reference found

Sponsored

Security Score

76%Good

Interactive

HTTPS

No WAF

62d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

16.03.2025

Valid Until

16.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (6)

astm.orgwww.astm.orgaccount.astm.orgstore.astm.orgsn.astm.orgnewsroom.astm.org

SHA-256 Fingerprint

47:14:E8:BB:C2:A4:DE:94:AA:B1:A8:BE:4B:01:A5:4B:25:26:F8:FC...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🔴 No Cache(private, no-cache, no-store, max-age=0, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-security-policy

frame-ancestors 'self' https://*.contentstack.com https://*....

content-type

text/html; charset=utf-8

date

Fri, 13 Feb 2026 08:04:56 GMT

link

</_next/static/css/7efa67a9ecc067bd.css>; rel=preload; as="s...

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

extmaila.astm.org

extmaild.astm.org

Domain Information

astm.org

Domain Age

32y 1m

Created

13.01.1994

Expires

12.01.2027

Last Updated

13.01.2026

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Typography & Readability

arial-nova

34/100

Readability

/30

25/40

50px · LH 1.16

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

arial-nova

Sans

Body Font

arial-nova

Sans50px

Contrast Ratio

Reading Comfort

~40 CPL

Needs attention

32px

24px

50px

✅ Excellent readability: 50px body text is ideal for all devices.

⚠️ Tight line spacing (1.16). Consider 1.4-1.6 for better readability.

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

✅ Consistent design: Single font family with weight variations is a modern best practice.

⚠️ Risky: Text appears on background images without overlay protection.

⚠️ Cramped layout: 44 elements lack adequate spacing.

AAdobe Fonts Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

HotjarMid-Market

User behavior and product analytics

Advertising

LinkedIn AdsEnterprise

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(16)googletagmanager.com(2)marketing.astm.org(1)snap.licdn.com(1)

Website Identity

astm.org

32 years old

CSC Corporate Domains, Inc.

Social Profiles

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 13 Feb 2026 at 08:05

Historical Analysis & Change Tracking