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

swift.org

https://swift.org· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

swift.org

Sponsored

Hosting Provider

Apple Inc

IP Address

17.253.144.12

Server Location

🇺🇸 Cupertino, United States

ASN

AS714

Organization

Apple Inc

Server

Apple

CDN

Nameservers

d.ns.apple.com.a.ns.apple.com.b.ns.apple.com.c.ns.apple.com.

Performance

Page Speed

895 KB

29 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Apple Inc

CDN

Technology Stack

2 Technologies Detected

CSS Frameworks

Tailwind CSS

Analytics

Google Analytics

SEO Analysis

C64/100

swift.orgswift.org

Swift Programming Language

No description available for this page.

Title Length26 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (1)

• Missing meta description - important for click-through rates

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

439 URLs

robots.txt

2 rules

Sponsored

Security Score

56%Poor

Interactive

HTTPS

No WAF

69d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Apple Inc.

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

02.02.2026

Valid Until

29.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.swift.orgswift.org

SHA-256 Fingerprint

36:08:E4:60:4B:4B:B4:C3:03:C4:DE:1D:1B:03:5E:F7:ED:1D:D3:3D...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ranges

bytes

age

cdnuuid

0a67e346-7163-4a4d-b495-a897539fdb7b-1099408999

cache-control

🟡 180s(max-age=180, public)

connection

keep-alive

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

swift.org

Domain Information

swift.org

Domain Age

29y 2m

Created

13.12.1996

Expires

12.12.2026

Last Updated

12.12.2025

Registrar

Nom-iq Ltd. dba COM LAUDE

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

-apple-system

90/100

Readability

/30

40/40

17px · LH 1.60

Hierarchy

/20

25/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

-apple-system

Sans34px

Body Font

-apple-system

Sans17px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

34px

32px

24px

14px

17px

✅ Excellent readability: 17px body text is ideal for all devices.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

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

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

✅ 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.

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)developer.apple.com(1)

Website Identity

X (Twitter)GitHub Mastodon Bluesky

Sponsored

Last analyzed: 19 Feb 2026 at 18:08

Historical Analysis & Change Tracking