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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runkeeper.com

https://runkeeper.com· First analyzed 25 Apr 2026· Updated 25 Apr 2026

Export

runkeeper.com

Mobile

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

18.165.140.44

Site Location

🇫🇮 Finlandvia ip

Server Location

🇫🇮 Helsinki, Finland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Nginx

CDN

CloudFront

Nameservers

ns-549.awsdns-04.net.ns-1491.awsdns-58.org.ns-1692.awsdns-19.co.uk.ns-381.awsdns-47.com.

Performance

Core Web Vitals

Weight

First Contentful Paint

1.2 s10%

Speed Index

1.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

11.8 MB

45 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

runkeeper_theme_2_0Custom

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

10 Technologies Detected

Plugins

Atomic Blocks Instagram Feed

Yoast SEO

Other

AOS (Animate On Scroll)

CSS Frameworks

Icon Libraries

Analytics

Tag Managers

Web Servers

Libraries

SEO Analysis

A83/100

Meta Tags15/15

Content10/12

Headings8/8

Technical25/25

E-E-A-T0/7

Images2/7

Links2/5

URL5/5

Social5/5

Freshness4/4

Mobile4/4

Indexability3/3

runkeeper.comrunkeeper.com

Track your Run - ASICS Runkeeper Running Tracker App

Just like a real-life coach, the ASICS Runkeeper app will help you set your goals, train for them, and track your progress along the way.

Title Length52 chars

Recommended: 50-60 chars (~318px / 580px)

Description Length137 chars

Recommended: 120-160 chars

Issues (1)

• Most images missing alt text (20/24) — critical for accessibility and SEO

6 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

10 URLs

10 sub-sitemaps

robots.txt

27 rules

Sitemap reference found

Local SEO

Local Search Readiness

17/100

Poor

5 12 1

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F36/100

Bot Access

3/25

Machine Read.

13/25

Schema Data

4/25

Citation

16/25

AI Bot Access

0/14 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.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

navheader/footer

Text ratio:3%

Words:521

Token eff.:Optimal

Sections/1K:34.5

Depth:2/5

Structured Data

4 JSON-LD

WebSiteBreadcrumbListSearchAction

Citation Readiness

Opening Summary43w

Descriptive Headingsavg 3.4w

Canonical URL

Open Graph3/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

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

15/20

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

Semantic Structure

20/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

2/15

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

5/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 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.

43/100

1.23 g

CO₂e / view

11.8 MB

Page Weight

Cleaner Than

New Visitor

1.40 g

Returning (cached)

700 mg

Annual (10K/mo)

147.0 kg

Emission Segments

Data Center

60 mg

Network

360 mg

Device

805 mg

Resource Breakdown

JavaScript

98.3 KB

Images

11.1 MB

CSS

632.1 KB

HTML

22.8 KB

Other

600 B

Green Hosting Verified

Amazon Web Services (AWS)

Provider Match

6 recommendations

•Carbon footprint recommendation preview...

Upgrade to view recommendations

Security Score

21%Critical

Interactive

HTTPS

No WAF

312d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

03.02.2026

Valid Until

03.03.2027

OCSP Stapling

Enabled

Subject Alternative Names (6)

runkeeper.com*.fitnesskeeperapi.comrnkpr.com*.rnkpr.comfitnesskeeperapi.com*.runkeeper.com

SHA-256 Fingerprint

8B:AC:A8:37:40:C6:1D:F7:06:2D:4F:3E:AD:86:FC:48:40:00:B3:4A...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 600s(max-age=600, must-revalidate)

content-encoding

⚡ Brotli(br)

content-type

text/html; charset=UTF-8

date

Sat, 25 Apr 2026 09:21:28 GMT

link

<https://runkeeper.com/cms/>; rel=shortlink

server

nginx

Good Warning Issue

Email Infrastructure

Mimecast

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (2)

de-smtp-inbound-2.mimecast.com

de-smtp-inbound-1.mimecast.com

Domain Information

runkeeper.com

Domain Age

18y 2m

Created

20.02.2008

Expires

20.02.2027

Last Updated

16.01.2026

Registrar

Amazon Registrar, 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.

76/100

Mobile Friendly1 breakpoint

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

1 recommendation

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

ASICS Webfont

WCAG AA

76/100

Readability

/30

23/30

21px · LH 1.50

Hierarchy

/20

19/20

4.29x ratio · ✓ H1→H6

WCAG

/25

15/25

5.78:1 min contrast

Performance

/25

19/25

System fonts

Heading Font

ASICS Webfont

Sans90px

Body Font

ASICS Webfont

Sans21px

Contrast Ratio

5.78:1

WCAG AA (≥4.5:1)

Reading Comfort

~37 CPL

Narrow lines

90px

67px

21px

✅ Excellent readability: 21px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

✅ WCAG AA contrast: All text meets 4.5:1 ratio (min 5.8:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

✅ Strong hierarchy: Headlines are 4.3x larger than body text.

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

Buy on MyFontsFlesch 68

Color Palette

13 unique colors

Light

#ffffff

Primary· 34.3%

#68472d

Secondary· 8.2%

#7186a9

Secondary· 7.8%

#886c57

Secondary· 6.7%

#b4c1cb

Secondary· 6.5%

#8099b5

Secondary· 6.1%

#9aadbf

Secondary· 6%

#e1e6e8

Secondary· 6%

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

runkeeper.com(6)googletagmanager.com(1)unpkg.com(1)cdn.cookielaw.org(1)

Website Identity

Track your Run - ASICS Runkeeper Running Tracker App

Just like a real-life coach, the ASICS Runkeeper app will help you set your goals, train for them, and track your progress along the way.

runkeeper.com/cms/

18 years old

Location detected: 🇫🇮 Finlandvia ip

Amazon Registrar, Inc.📧 Mimecasten-US

Social Profiles

Facebook X (Twitter)Instagram YouTube

Sponsored

Last analyzed: 25 Apr 2026 at 09:21

Historical Analysis & Change Tracking