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

callawaygolf.com

https://callawaygolf.com· First analyzed 26 Apr 2026· Updated 26 Apr 2026

Export

callawaygolf.com

Mobile

Sponsored

Hosting Provider

Vercel

vercel.com

IP Address

64.239.109.1

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Walnut, United States

ASN

AS16509

Organization

Vercel, Inc

Server

Vercel

Nameservers

pdns1.cscdns.net.pdns2.cscdns.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.3 s10%

Speed Index

1.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

3.1 MB

310 requests

Image Optimization

Lazy LoadWebPResponsiveVercel Image Optimization

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

Infrastructure

Platform

Vercel

CDN

Vercel Image

Technology Stack

20 Technologies Detected

Advertising

Google Ads Twitter Ads LinkedIn Ads TikTok Pixel Microsoft Advertising Criteo

Analytics

Google Analytics

Google Analytics 4

Facebook Pixel Segment FullStory

Fonts

Adobe Fonts (Typekit)Adobe Fonts

Frameworks

Meta Frameworks

CSS Frameworks

Tag Managers

Payments

Personalization

Platforms

SEO Analysis

C60/100

Meta Tags15/15

Content3/12

Headings3/8

Technical19/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile3/4

Indexability3/3

callawaygolf.comcallawaygolf.com

Callaway Golf Official Site | Golf Clubs, Golf Balls

The Official source for Callaway golf clubs, golf balls and gear. Discover a wide range of premium golf clubs, equipment and more!

Title Length52 chars

Recommended: 50-60 chars (~305px / 580px)

Description Length130 chars

Recommended: 120-160 chars

Issues (2)

• Very thin content (9 words). Search engines need substantial content for ranking.
• Missing H1 tag — every page should have exactly one H1

9 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

1 URLs

1 sub-sitemaps

robots.txt

31 rules

Sitemap reference found

Local SEO

Local Search Readiness

31/100

Needs Work

8 9 2

Sponsored

AI & LLM Readiness

F37/100

Bot Access

20/25

Machine Read.

13/25

Schema Data

0/25

Citation

4/25

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.txtvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:0%

Words:1,512

Token eff.:Optimal

Structured Data

Microdata

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

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.

68/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

6/20

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

11/15

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.

2 recommendations

•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.

38/100

317 mg

CO₂e / view

3.1 MB

Page Weight

30%

Cleaner Than

New Visitor

363 mg

Returning (cached)

181 mg

Annual (10K/mo)

38.1 kg

Emission Segments

Data Center

16 mg

Network

93 mg

Device

208 mg

Resource Breakdown

JavaScript

2.7 MB

Images

36.8 KB

CSS

95.5 KB

Fonts

36.9 KB

HTML

161.0 KB

Other

65.1 KB

Green Hosting Verified

Vercel

Provider Match

5 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

66%Fair

Interactive

HTTPS

No WAF

64d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

31.03.2026

Valid Until

29.06.2026

Subject Alternative Names (1)

www.callawaygolf.com

SHA-256 Fingerprint

EB:6A:80:A3:79:33:5D:75:6B:3B:47:CE:59:AB:F6:72:AC:98:D9:C5...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

cache-control

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

content-encoding

⚡ Brotli(br)

content-security-policy

frame-ancestors 'self' *.contentstack.com

content-type

text/html; charset=utf-8

date

Sun, 26 Apr 2026 10:17:09 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mxb-002fd801.gslb.pphosted.com

mxa-002fd801.gslb.pphosted.com

Domain Information

callawaygolf.com

Domain Age

30y 11m

Created

24.05.1995

Expires

23.05.2027

Last Updated

19.05.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

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.

64/100

Mobile Friendly3 breakpoints

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=1

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

__Roboto_Condensed_53ac5f + __Roboto_f0b2ec

WCAG Partial

57/100

Readability

/30

22/30

16px · LH 1.40

Hierarchy

/20

7/20

WCAG

/25

12/25

1:1 min contrast

Performance

/25

16/25

System fonts

Heading Font

__Roboto_Condensed_53ac5f

Sans

Body Font

__Roboto_f0b2ec

Sans16px

Contrast Ratio

1:1

14 issues

Reading Comfort

~44 CPL

Narrow lines

30px

24px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.40 ratio (ideal range 1.4–1.6).

✅ Easy to read: Flesch score 80/100 — accessible to general audiences.

⚠️ Partial contrast: 14 elements below WCAG AA threshold (min 1.0:1).

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

❌ Pure vw font sizes: Viewport units alone break browser zoom (WCAG 1.4.4 fail). Use clamp(rem, vw, rem).

AAdobe Fonts Buy on MyFontsFlesch 81

Color Palette

9 unique colors

21:1 AAA Light

#ffffff

Background· 26.400000000000002%

#000000

Background· 25.900000000000002%

#2c1312

Primary· 12.4%

#551012

Accent· 8.8%

#8f171b

Accent· 7.4%

#2f86e1

Accent· 6.1%

#293556

Secondary· 4.5%

#864345

Secondary· 3.6%

Business & Marketing Stack

10 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

ContentsquareEnterprise

User behavior and product analytics

Advertising

Twitter/X AdsMid-Market

LinkedIn AdsEnterprise

TikTok PixelMid-Market

Microsoft AdsEnterprise

Reddit PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Reviews & Social Proof

BazaarvoiceEnterprise

Customer reviews and testimonials

Sponsored

Scripts & Styles

27 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)c.lytics.io(3)analytics.tiktok.com(3)google-analytics.com(1)pixel.byspotify.com(1)

Website Identity

callawaygolf.com

1-877-723-5218

30 years old

2180 Rutherford RoadCarlsbad, CA 92008

Location detected: 🇺🇸 United Statesvia ip

CSC Corporate Domains, Inc.en

Social Profiles

Facebook X (Twitter)Instagram

Sponsored

Last analyzed: 26 Apr 2026 at 10:17

Historical Analysis & Change Tracking