# BeaverCheck Audit Report — https://www.codecademy.com

**Date:** April 7, 2026  
**URL:** https://www.codecademy.com  
**Overall Grade:** C (79/100)  
**Report:** https://beavercheck.com/results/6f09d51a-04eb-9980-0abe-dbc218eb3968

## Top Findings

1. **[CRITICAL]** Content-Security-Policy header is missing — Security > Security Headers
2. **[CRITICAL]** No Content-Security-Policy header found — Security > Content Security Policy
3. **[WARNING]** External script from challenges.cloudflare.com lacks integrity attribute — Security > Subresource Integrity
4. **[WARNING]** No DMARC record found — Security > Email Security
5. **[WARNING]** Third-party code accounts for 81% of page weight (369.4 KiB of 454.5 KiB) — Performance > Third-Party Impact

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 81 |
| Accessibility | 91 |
| Best Practices | 92 |
| SEO | 50 |

---

## Security

### Security Headers (A — 85/100)

*9 of 10 headers properly configured*

- **[PASS]** Strict-Transport-Security is properly configured
- **[PASS]** X-Content-Type-Options is properly configured
- **[PASS]** X-Frame-Options is properly configured
- **[PASS]** Referrer-Policy is properly configured
- **[PASS]** Permissions-Policy is set
- **[CRITICAL]** Content-Security-Policy header is missing — CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.
- **[PASS]** Cross-Origin-Opener-Policy is properly configured
- **[PASS]** Cross-Origin-Embedder-Policy is set
- **[PASS]** X-Powered-By header is not present
- **[PASS]** Server header is present without version info

### Content Security Policy (F — 0/100)

*No enforcing CSP policy found*

- **[CRITICAL]** No Content-Security-Policy header found — CSP is the most effective defense against XSS attacks. Add a Content-Security-Policy header to restrict resource loading.

### TLS & Certificates (A+ — 100/100)

*TLS 1.3, 7 checks passed*

- **[PASS]** TLS 1.3 is used
- **[PASS]** Strong cipher suite is used
- **[INFO]** HTTP/2 is not negotiated — HTTP/2 provides multiplexing and header compression for better performance.
- **[PASS]** Certificate is valid (expires in 56 days)
- **[PASS]** Certificate chain has 3 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 1 domain(s)
- **[PASS]** Certificate is issued by a trusted CA

### Cookie Security (A+ — 100/100)

*No cookies set — no cookie security risks*

- **[PASS]** No cookies set — no cookie security risks

---

## Advanced Security

### Subresource Integrity (F — 20/100)

*0 of 1 external resources have SRI*

- **[WARNING]** External script from challenges.cloudflare.com lacks integrity attribute — Without SRI, if this CDN is compromised, attackers could inject malicious code.

### JS Library Vulnerabilities (A+ — 100/100)

*No known vulnerabilities*

- **[PASS]** No known JavaScript library vulnerabilities detected

### Information Leakage (A+ — 100/100)

*No exposures*

- **[PASS]** security.txt is present — good practice
- **[PASS]** No sensitive files exposed

### Email Security (F — 30/100)

*No DMARC*

- **[WARNING]** No DMARC record found — Without DMARC, email receivers have no policy for handling authentication failures.

### Permissions-Policy (A+ — 100/100)

*17 directives, 0 missing*

- **[PASS]** accelerometer=() — blocked for all origins
- **[PASS]** browsing-topics=() — blocked for all origins
- **[PASS]** camera=() — blocked for all origins
- **[PASS]** clipboard-read=() — blocked for all origins
- **[PASS]** clipboard-write=() — blocked for all origins
- **[PASS]** geolocation=() — blocked for all origins
- **[PASS]** gyroscope=() — blocked for all origins
- **[PASS]** hid=() — blocked for all origins
- **[PASS]** interest-cohort=() — blocked for all origins
- **[PASS]** magnetometer=() — blocked for all origins
- **[PASS]** microphone=() — blocked for all origins
- **[PASS]** payment=() — blocked for all origins
- **[PASS]** publickey-credentials-get=() — blocked for all origins
- **[PASS]** screen-wake-lock=() — blocked for all origins
- **[PASS]** serial=() — blocked for all origins
- **[PASS]** sync-xhr=() — blocked for all origins
- **[PASS]** usb=() — blocked for all origins

### CORS Configuration (B — 80/100)

*No CORS headers*

- **[PASS]** No CORS headers present — secure default

---

## Performance

### Page Weight Budget (A+ — 100/100)

*454 KB transferred, 16 requests*

- **[PASS]** Page weighs 879 KB (454 KB transferred)
- **[PASS]** 16 HTTP requests
- **[INFO]** Estimated 0.09 g CO2 per page load

### Third-Party Impact (D — 50/100)

*81% third-party, 0 ms blocking*

- **[WARNING]** Third-party code accounts for 81% of page weight (369.4 KiB of 454.5 KiB)
- **[PASS]** Third-party blocking time is low (0 ms)

### Text Compression (A+ — 100/100)

*All text resources are compressed*

- **[PASS]** All text resources are compressed

### Image Optimization (A — 90/100)

*2 images, 0 KB saveable*

- **[PASS]** All images are well-optimized

### JS Execution Cost (C — 60/100)

*1280ms total JS execution*

- **[WARNING]** https://www.codecademy.com/cdn-cgi/challenge-platf...: 1020ms CPU time
- **[INFO]** Unattributable: 186ms CPU time
- **[INFO]** https://www.codecademy.com/: 74ms CPU time
- **[INFO]** Third-party scripts: 186ms (15% of total)

### Font Loading (A+ — 100/100)

*No web fonts (system fonts)*

- **[PASS]** No web fonts loaded — system fonts are fastest

### JS Bundles (A+ — 100/100)

*7 scripts, 0 KB unused*


### Resource Caching (A+ — 100/100)

*All resources properly cached*

- **[PASS]** No caching issues found

### Critical Rendering Path (A+ — 100/100)

*No render-blocking resources*

- **[PASS]** No render-blocking resources detected

### Resource Hints (A+ — 100/100)

*No optimization needed*

- **[PASS]** No resource hint issues

### Render-Blocking Resources (A+ — 100/100)

*No render-blocking resources detected*

- **[PASS]** No render-blocking resources detected in <head>

### Third-Party Resources (A+ — 100/100)

*No third-party resources detected*


---

## Content Quality

### Links (A+ — 100/100)

*5 links checked, 5 healthy, 0 broken*

- **[PASS]** 5 of 5 links are healthy

### Mixed Content (A+ — 100/100)

*No mixed content detected — all resources use HTTPS.*

- **[PASS]** No mixed content detected — all resources use HTTPS

### Open Graph (F — 0/100)

*No Open Graph tags found — social sharing previews will be generic.*

- **[WARNING]** No Open Graph meta tags found — Without og:title, og:description, and og:image, social media platforms will generate a generic preview when your page is shared.

### Structured Data (C — 40/100)

*No structured data (JSON-LD) found.*

- **[INFO]** No structured data (JSON-LD) found — Adding structured data helps search engines understand your content and can enable rich results.

---

## Infrastructure

### DNS Records (A — 90/100)

*2 A records, 30 ms lookup*

- **[PASS]** Resolves to 2 IPv4 address(es)
- **[PASS]** Has 2 IPv6 (AAAA) record(s)
- **[INFO]** No NS records found
- **[INFO]** No MX records — email not configured via DNS
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[INFO]** No SPF record found in TXT records — SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
- **[PASS]** DNS resolution time: 30 ms

### Redirect Chain (A+ — 100/100)

*0 redirect(s), 72 ms total*


### IPv6 Readiness (A+ — 100/100)

*IPv6 reachable (17 ms)*

- **[PASS]** IPv6 is configured and reachable at 2606:4700::6811:b878, 2606:4700::6811:b778

### Crawlability (A+ — 100/100)

*robots.txt present, sitemap with 12 URLs*

- **[PASS]** robots.txt is present
- **[PASS]** sitemap.xml is present
- **[PASS]** sitemap.xml is valid XML
- **[PASS]** sitemap.xml contains 12 entries
- **[PASS]** Sitemap index with 12 child sitemaps
- **[PASS]** robots.txt references sitemap

### URL Variants (A+ — 100/100)

*www/non-www, trailing slash, HTTP→HTTPS*

- **[PASS]** HTTP correctly 301-redirects to HTTPS

### Domain Intelligence (A+ — 100/100)

*codecademy.com — via CSC Corporate Domains, Inc., 14 years, 10 months old*

- **[PASS]** Domain registered until Aug 10, 2026 (4 months remaining)
- **[INFO]** DNSSEC is not enabled — DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
- **[PASS]** Registrar: CSC Corporate Domains, Inc.

---

## Compliance

### WCAG Compliance (A+ — 100/100)

*No testable criteria*


### Cookie Consent & Privacy (A+ — 95/100)

*privacy policy found*

- **[PASS]** Privacy policy link found
- **[INFO]** No terms of service link detected
- **[INFO]** No cookie consent banner detected
- **[INFO]** This is an automated check, not legal advice — BeaverCheck detects technical indicators of consent management. This does not constitute a legal compliance assessment. Consult a privacy professional for GDPR/CCPA compliance.

### Language & i18n (A — 90/100)

*Lang attribute present*

- **[PASS]** <html lang> attribute is present
- **[PASS]** <html lang> value is valid
- **[INFO]** No Content-Language HTTP header
- **[INFO]** Language signals are inconsistent — The <html lang> attribute and Content-Language header should agree.

### Readability & Typography (A+ — 100/100)

*Font sizes and tap targets checked*


### Viewport Configuration (A+ — 100/100)

*Viewport properly configured*

- **[PASS]** Viewport meta tag is present
- **[PASS]** width=device-width is set
- **[PASS]** User zooming is allowed

### Third-Party Trackers (A+ — 100/100)

*No third-party trackers detected*

- **[PASS]** No third-party trackers detected

---

## Legal

### Legal Page Ecosystem (F — 35/100)

*1 of 7 expected legal pages detected*

- **[PASS]** Privacy Policy detected — Found at https://www.cloudflare.com/privacypolicy/, linked from footer.
- **[WARNING]** Terms of Service not detected — No link matching common Terms of Service URL patterns or link text was found. Most websites are expected to have a Terms of Service, especially those collecting user data.
- **[INFO]** Cookie Policy not detected — No link matching common Cookie Policy URL patterns or link text was found. Most websites are expected to have a Cookie Policy, especially those collecting user data.
- **[INFO]** Accessibility Statement not detected — No link matching common Accessibility Statement URL patterns or link text was found. Most websites are expected to have a Accessibility Statement, especially those collecting user data.
- **[INFO]** DMCA / Copyright Notice not detected — No link matching common DMCA / Copyright Notice URL patterns or link text was found. Most websites are expected to have a DMCA / Copyright Notice, especially those collecting user data.
- **[INFO]** Refund / Returns Policy not detected — No link matching common Refund / Returns Policy URL patterns or link text was found. Most websites are expected to have a Refund / Returns Policy, especially those collecting user data.
- **[INFO]** Acceptable Use Policy not detected — No link matching common Acceptable Use Policy URL patterns or link text was found. Most websites are expected to have a Acceptable Use Policy, especially those collecting user data.

### Copyright Notice (C — 55/100)

*No copyright notice detected*

- **[INFO]** No copyright notice detected — No copyright notice detected in the page content. While not legally required in most jurisdictions (copyright exists automatically), a notice is standard practice and signals site ownership.

### Regulatory Indicators

*1 regulatory indicator(s) detected*

- **[INFO]** This is a technical scan, not a legal assessment — BeaverCheck detects technical indicators that may suggest regulatory relevance. This is not a compliance audit and should not be relied upon for legal decisions. Consult qualified legal counsel for compliance assessments.
- **[INFO]** GDPR indicators detected (moderate confidence) — Indicators suggesting GDPR may be relevant: Privacy policy page found. EU General Data Protection Regulation — governs collection and processing of personal data of EU residents.

### Third-Party Data Sharing

*1 third-party service(s) detected*

- **[INFO]** Data inventory for transparency purposes — This inventory identifies third-party services that receive data from your site visitors. Under regulations like GDPR (Article 30), maintaining records of data processing activities is commonly considered a best practice. This automated scan provides a starting point — it may not capture all data flows.
- **[INFO]** 1 third-party services across 1 categories — 1 third-party services detected across 1 categories: CDN (1). Each of these services receives some user data from your site visitors.
- **[INFO]** Cloudflare (CDN) — Detected via script URL. Typically collects: IP address (transient), Request metadata. Privacy policy: https://www.cloudflare.com/privacypolicy/. Data Processing Agreement available.

### Compliance Badges (C — 55/100)

*0 compliance badge(s) detected*

- **[INFO]** No compliance badges detected — No recognized compliance certification badges or seals were found. This is common — many sites do not display compliance badges.

---

## Availability

### CDN & Delivery (B — 80/100)

*Cloudflare*

- **[PASS]** Site is served via Cloudflare CDN (edge: CDG)

### HTTP Caching (F — 30/100)

*No cache headers*

- **[WARNING]** No Cache-Control header found — Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

### Transport Security (A — 90/100)

*HTTP/3, HSTS, and TLS version analysis*

- **[INFO]** HTTP/3 (QUIC) not advertised — HTTP/3 eliminates head-of-line blocking. If your CDN supports it, consider enabling it.
- **[PASS]** HSTS enabled (includeSubDomains, preload)
- **[PASS]** HSTS preload enabled
- **[PASS]** TLS 1.3 in use (fastest handshake, 1-RTT)

---

## Accessibility

### Landmark Structure (B — 70/100)

*2 landmarks*

- **[PASS]** <main> landmark present
- **[WARNING]** No <nav> landmark found
- **[INFO]** No banner (header) landmark
- **[WARNING]** Skip navigation link is missing (WCAG 2.4.1) — Add a skip link as the first focusable element so keyboard users can bypass repeated navigation.

### Heading Hierarchy (A+ — 100/100)

*3 headings*

- **[PASS]** Single H1 present

### Alt Text Quality (A+ — 100/100)

*All 1 images OK*

- **[PASS]** 1 image(s) with good alt text

### Form Accessibility (A+ — 100/100)

*No form controls*

- **[PASS]** No form controls on this page

### Link & Button Quality (A — 94/100)

*2 links, 0 buttons — all OK*

- **[WARNING]** 2 link(s) open in new tab without warning — Add '(opens in new tab)' to link text or aria-label.

---

## UX

### 404 Error Page (F — 35/100)

*HTTP 404, bare page*

- **[PASS]** Correct 404 status code returned
- **[WARNING]** Bare server default 404 page — The 404 page has no custom styling. Users hitting a broken link see a generic error with no way to navigate back. Add a custom 404 page with your site navigation and a search bar.

### Favicon & Branding (D — 50/100)

*8 icon(s) detected*

- **[PASS]** favicon.ico present at site root
- **[INFO]** No apple-touch-icon detected — iOS devices use this when users add your site to their home screen. Add <link rel='apple-touch-icon' sizes='180x180' href='/apple-touch-icon.png'>.
- **[PASS]** Multiple icon sizes detected

### Web Manifest (A+ — 95/100)

*PWA-ready*

- **[PASS]** Meets PWA install criteria
- **[PASS]** Name present: Codecademy
- **[PASS]** 192x192 icon present
- **[PASS]** 512x512 icon present
- **[PASS]** Display mode: standalone

### Dark Mode Support (B — 70/100)

*Dark mode detected*

- **[PASS]** prefers-color-scheme CSS detected in inline styles
- **[INFO]** Detection limited to meta tags and inline styles — External CSS files may contain prefers-color-scheme rules not visible to this scan.

### Print Stylesheet (D — 40/100)

*No print styles*

- **[INFO]** No print-specific styles detected — When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.

### Navigation UX (F — 0/100)

*No navigation patterns*

- **[INFO]** No breadcrumbs, search, or skip link detected — These navigation aids help users orient themselves and find content efficiently, especially on large sites.

---

## SEO

### Canonical URL (B — 80/100)

*Minor issues*

- **[WARNING]** No canonical tag found — Search engines will determine the canonical URL themselves, which may cause duplicate content issues.

### Meta Tags (A — 85/100)

*Title: 16 chars*

- **[PASS]** Page title is set
- **[WARNING]** Title is only 16 characters — consider expanding
- **[INFO]** Title and H1 have very different wording — Alignment helps users confirm they've reached the right page.

### Content Depth (F — 10/100)

*47 words, Very Difficult*

- **[CRITICAL]** Page has only 47 words — nearly empty — Search engines need substantive text content to understand and rank a page.
- **[INFO]** Text-to-HTML ratio is 1% — Very low ratio suggests heavy framework overhead or boilerplate.
- **[INFO]** Reading level: Very Difficult (grade 11)
- **[WARNING]** Thin content — only 47 words

### Internal Links (B — 70/100)

*0 internal, 2 external*

- **[WARNING]** No internal links found — Internal links help search engines discover and rank your other pages.
- **[PASS]** 100% of links use descriptive anchor text
- **[INFO]** 0 internal / 2 external links
- **[WARNING]** Dead-end page — no outgoing internal links

### Image SEO (A+ — 100/100)

*1 images, 1 descriptive filenames*

- **[PASS]** All images have descriptive filenames

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (A+ — 100/100)

*0.11g CO2 per view*

- **[PASS]** 0.11g CO2 per page view — This page transfers 0.4 MB, producing an estimated 0.11g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.02g, end-user device 0.08g.
- **[INFO]** At 10,000 monthly views: 12.6 kg CO2/year — With 10,000 page views per month, this page would generate approximately 12.6 kg of CO2 annually — equivalent to charging 1575 smartphones.
- **[PASS]** Green hosting reduces data center emissions

### Green Hosting (A+ — 100/100)

*Green (both)*

- **[PASS]** Both hosting and CDN use renewable energy
- **[INFO]** Cloudflare: Verified by the Green Web Foundation
- **[INFO]** Cloudflare: 100% renewable energy for global network since 2019
- **[INFO]** Green hosting status based on known provider commitments — Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.

### Repeat Visit Weight (B — 80/100)

*78% cached*

- **[PASS]** 78% reduction on repeat visits — Returning visitors download only 100 KB (vs 454 KB first visit). 14 of 16 resources are served from browser cache, saving 0.08g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.02g CO2 (first visit: 0.11g)

### Carbon Budget (A+ — 100/100)

*10th percentile*

- **[PASS]** 0.11g CO2 — below the sustainability target of 0.50g — Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
- **[INFO]** Estimated 10th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

### Transfer Efficiency (A+ — 100/100)

*100% efficient*

- **[PASS]** Transfer efficiency: 100% — Only 0 KB of potential savings identified. Your page is well-optimized for size.

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*Generated by [BeaverCheck](https://beavercheck.com) — https://beavercheck.com/results/6f09d51a-04eb-9980-0abe-dbc218eb3968*
