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Recent Trends
Performance stable →
51
TTFB stable →
163ms
FCP stable →
2.2s
LCP stable →
3.3s
Scanned
2026-04-16 18:05 UTC
Worker
🇪🇸 Madrid
Duration
2.9m
Vs prev

Audit overview

3 categories need attention: Security, and 2 others.

Fix Priority Matrix

5 findings

Quick Wins

2

High impact, low effort — start here.

Strategic

3

High impact, requires investment.

Easy Improvements

0

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

0

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →

Screenshots

DESKTOP + MOBILE
Desktop
Desktop screenshot
Mobile
Mobile screenshot

Top Priorities (5)

Sorted by impact
Critical: 1

Content-Security-Policy header is missing

Without a CSP, a single XSS bug can exfiltrate everything your users type — including credentials.

Security › Security Headers
Critical: 2

No Content-Security-Policy header found

Without a CSP, a single XSS bug can exfiltrate everything users type — credentials, payment data, session tokens.

Security › Content Security Policy
Critical: 3

3 image(s) missing alt attribute

Each image without alt text is a WCAG 1.1.1 failure — invisible to screen-reader users, lost from Google Image Search.

Accessibility › Alt Text Quality
Critical: 4

3 image-in-link without alt text

Image-only links with no alt create empty links — screen-reader users hear 'link' with no destination context.

Accessibility › Alt Text Quality
Critical: 5

3 image-only link(s) without alt text

Image-only links with no alt are unidentifiable to screen-reader users — link's destination is invisible.

Accessibility › Link & Button Quality
What fixing these means. Your site performs reasonably well, but a few targeted fixes could meaningfully improve results. Accessibility issues exclude users who rely on assistive technology — an estimated 15% of your potential audience. Addressing the critical issues below would have the most immediate impact on your user trust.
2 security gaps detected — browsers may warn visitors about your site.
3 accessibility issues exclude users who rely on assistive technology.

Business case

What fixing the audit's findings is worth -- and what ignoring them keeps costing.

Return on investment

$850 investment → $6,545/month returns + USD 157,500 risk avoided

Investment
$850
8.5 h · 5 findings
Monthly returns
$6,545
$78,538/yr
Payback
0.1 mo
+9140% Y1
Regulatory risk avoided USD 157,500
Or — fix only the top 3 findings
$7500.1 mo payback · +10372% Y1
Optimistic scenario assuming the top 3 capture most of the upside. Real-world recovery typically falls between this projection and the full-fix ROI above.
$100 — in quick wins — start here for the fastest payback

Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.

Conversion barriers

8 barrier(s) likely increasing bounce by ~24%.

Barriers
8
2 crit 6 warn
Bounce delta
+24pp
added vs baseline
Score
62
C
Speed
1
Trust
2
Usability
0
Content
3
Nav
2
  • Page feels frozen for 2.4s
    Clicks on the primary CTA are ignored while JavaScript runs
    → Break up long tasks; defer non-critical JavaScript to post-hydration
  • 8 broken link(s) on the page
    Clicks land on 404s — trust drops and the session often ends
    → Fix or remove the broken destinations surfaced on the Content tab
  • No HSTS header
    Returning visitors are briefly exposed to downgrade attacks on first request
    → Set Strict-Transport-Security: max-age=31536000; includeSubDomains
  • No Content-Security-Policy header
    Higher XSS blast radius — one compromised script can exfiltrate the checkout form
    → Ship a reporting-only CSP first, then enforce once violations are clean
  • No Open Graph tags
    Links shared on LinkedIn / Slack / Facebook show bare URLs — referral clicks drop
    → Add og:title, og:description, og:image, og:url to the page head

Preliminary CRO audit — each barrier links to the tab with detailed analysis.

Remediation cost

$850 8.5 developer hours at $100/hr
Quick wins
$100 2 fixes in ~60 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions

Team composition

Multiplier applied to dev hours to reflect QA, design, and PM overhead. Use Dev only for solo work; Full team for projects with formal review processes.

$ /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

Warning:Cost of inaction

$6,545 / month at risk ~$78,538 / year if left unfixed
Default is 10,000. Use your own number for accurate $-figures.

Compliance Risk

$157,500

ADA Title IIICCPA/CPRA
  • No privacy policy link detected
    CCPA/CPRA: USD 2,500 – USD 7,500
  • Trackers detected but no cookie policy found
    CCPA/CPRA: USD 2,500 – USD 7,500
  • Trackers detected but no privacy policy found
    CCPA/CPRA: USD 2,500 – USD 7,500

Bounce-Rate Cost

$6,545 /mo

+24.3pp bounce · ~2,433 lost visitors/mo

CPC: USD 2.69

Bandwidth Waste

$0.26 /mo

3283.4 MB/mo × 0.080 USD/GB

  • Optimize transfer: save ~328 KB per page load
    Saves $0.26/mo

Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.

Compliance methodology · SEO assumptions · Bandwidth model

Your performance is already good — improvements may show diminishing returns

Unique monthly visitors from your analytics

Purchases, signups, or key actions

Optional — for revenue estimation

additional conversions/month

more engaged visitors from reduced bounce

potential monthly revenue
Current bounce (est.)
After fixes (est.)
Estimated bounce reduction

Fix 5 critical issues to capture this value

How this is calculated

Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.

Your site's LCP: → estimated after fixes.

These are estimates based on industry research — actual results vary

Bounce-rate model & assumptions

Your data stays in your browser — nothing is sent to our servers

Lighthouse

Mobile

60
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.84 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.00 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

2.35 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.029

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

14.32 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

10.04 s

Desktop

81
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

746 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

786 ms

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

232 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.014

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

6.89 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.14 s

Categories

8
Avg score 71.2

How you compare

Where this site stands against peers running the same stack.

Backbone.js · 61 peers
You 71
·
Avg 72
At average
0 50 100
Better than 29% of Backbone.js sites See full Backbone.js benchmark →
core-js · 1582 peers
You 71
·
Avg 72
At average
0 50 100
Content P2Accessibility P7SEO P7Compliance P15Performance P85Sustainability P72Security P61Infrastructure P59

Top 10% of core-js sites score 95+ on Content; you're at 60 — closing this gap is the highest-leverage improvement.

Better than 24% of core-js sites See full core-js benchmark →

Technology stack

Backbone.js 1.1.2

10 technologies detected 1 stack layers 3 with CPE identifier Enterprise

Stack Architecture

Framework
Backbone.js 1.1.2Google Search Console HSTS Lodash 3.10.1Microsoft 365 Proofpoint React 16.8.6 Redux Zepto core-js 2.6.5

All Detected Technologies (10)

BackboneJS is a JavaScript library that allows to develop and structure the client side applications that run in a web browser.

Categories JavaScript frameworks Website https://backbonejs.org Detected by BeaverCheck
This technology has a CPE identifier — check for known vulnerabilities Search NVD →
Categories Analytics Detected by BeaverCheck · Medium Evidence TXT record: google-site-verification=s1KAsSED_OW5FMoqEkTv7d5Vl6IjwQbhNFAkBqtykiQ

HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.

Categories Security Website https://www.rfc-editor.org/rfc/rfc6797#section-6.1 Detected by BeaverCheck

Lodash is a JavaScript library which provides utility functions for common programming tasks using the functional programming paradigm.

Categories JavaScript libraries Website https://www.lodash.com Detected by BeaverCheck
This technology has a CPE identifier — check for known vulnerabilities Search NVD →
Categories Email Detected by BeaverCheck Evidence TXT SPF record includes spf.protection.outlook.com: v=spf1 ip4:198.22.123.0/24 ip4:168.94.230.0/24 ip4:198.22.122.4 ip4:198.22.122.6 include:spf.protection.outlook.com include:spf-002a6b01.pphosted.com include:spf-007f1401.pphosted.com ~all
Categories Email Detected by BeaverCheck Evidence MX record: mxa-002a6b01.gslb.pphosted.com

React is an open-source JavaScript library for building user interfaces or UI components.

Categories JavaScript frameworks Website https://reactjs.org Detected by BeaverCheck
This technology has a CPE identifier — check for known vulnerabilities Search NVD →

Redux is a predictable state container for JavaScript applications.

Categories JavaScript frameworks Website https://redux.js.org Detected by BeaverCheck
Categories JavaScript libraries Website https://zeptojs.com Detected by BeaverCheck

core-js is a modular standard library for JavaScript, with polyfills for cutting-edge ECMAScript features.

Categories JavaScript libraries Website https://github.com/zloirock/core-js Detected by BeaverCheck

Observations (3)

No build tool detected

A framework (Backbone.js) was detected but no bundler was identified. The build tool may not be detectable from output patterns, or the site may use the framework's built-in bundler.

React version may be outdated

Detected React 16.8.6. The current major version is 18. Consider updating for security patches and new features.

→ Security

Complex technology stack detected

10 technologies identified. A complex stack increases maintenance burden and attack surface. Consider whether all components are actively needed.

Show your score

Drop this badge on your README, marketing site, or status page. It auto-updates every time the audit re-runs and links back to this report.

BeaverCheck badge

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[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Fbestbuy.com)](https://beavercheck.com/results/a2878c27-8079-4e66-b57c-26983740e8a2)
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https://beavercheck.com/badge?url=https%3A%2F%2Fbestbuy.com

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Fix Plan

Three-week roadmap to ship the audit's findings, with one-click copy targets for your tracker.

Three-week fix plan

2 sprints · 8h total → projected C (79)

Sprint 1: Quick Wins

+3

Highest ROI — low effort, high impact

2 findings 1h → C (74)
  • · 3 image-in-link without alt text
  • · 3 image-only link(s) without alt text

Sprint 2: Core Fixes

+5

Medium effort, high structural impact

3 findings 8h → C (79)
  • · 3 image(s) missing alt attribute
  • · Content-Security-Policy header is missing
  • · No Content-Security-Policy header found

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