# BeaverCheck Audit Report — https://tailwindcss.com

**Date:** April 4, 2026  
**URL:** https://tailwindcss.com  
**Overall Grade:** C (76/100)  
**Report:** https://beavercheck.com/results/91815bbe-41bf-44c0-9b55-a609ec590f4e

## 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. **[CRITICAL]** Page weighs 9.6 MB (7.2 MB transferred) — Performance > Page Weight Budget
4. **[CRITICAL]** 1 button(s) with no accessible text — Accessibility > Link & Button Quality
5. **[CRITICAL]** 2 image(s) missing alt attribute — Accessibility > Alt Text Quality

---

## Lighthouse Scores

| Category | Score |
|----------|-------|
| Performance | 57 |
| Accessibility | 86 |
| Best Practices | 96 |
| SEO | 91 |

---

## Security

### Security Headers (F — 20/100)

*1 of 10 headers properly configured*

- **[WARNING]** HSTS is missing includeSubDomains — Without includeSubDomains, subdomains can still be accessed over HTTP.
- **[WARNING]** X-Content-Type-Options header is missing — This header prevents MIME-type sniffing, which can lead to XSS attacks. Set it to 'nosniff'.
- **[WARNING]** X-Frame-Options header is missing — This header prevents clickjacking by controlling who can embed your page in a frame. Set it to DENY or SAMEORIGIN.
- **[WARNING]** Referrer-Policy header is missing — Controls how much referrer information is sent with requests. Set to 'strict-origin-when-cross-origin' or stricter.
- **[WARNING]** Permissions-Policy header is missing — Controls which browser features (camera, microphone, geolocation) are allowed. Set it to restrict unused features.
- **[CRITICAL]** Content-Security-Policy header is missing — CSP is the most important header for preventing XSS attacks. See the CSP section for detailed analysis.
- **[WARNING]** Cross-Origin-Opener-Policy header is missing — COOP isolates your browsing context, preventing cross-origin side-channel attacks. Set to 'same-origin'.
- **[WARNING]** Cross-Origin-Embedder-Policy header is missing — COEP prevents loading cross-origin resources without explicit permission. Required for SharedArrayBuffer and high-resolution timers.
- **[WARNING]** X-Powered-By header reveals technology stack — This header discloses server technology (e.g. Express, PHP), helping attackers target known vulnerabilities. Remove it.
- **[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 75 days)
- **[PASS]** Certificate chain has 3 certificates
- **[PASS]** Certificate uses modern signature algorithm
- **[PASS]** Certificate covers 2 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 (A+ — 100/100)

*No external resources*

- **[PASS]** No external resources to protect

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

*No known vulnerabilities*

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

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

*No exposures*

- **[INFO]** No security.txt found — Consider adding a security.txt at /.well-known/security.txt.
- **[PASS]** No sensitive files exposed

### Email Security (D — 50/100)

*DMARC: none*

- **[WARNING]** DMARC policy is none — monitoring only — This only monitors, it doesn't block spoofed emails. Change to p=quarantine or p=reject.

### Permissions-Policy (D — 40/100)

*No header set*

- **[WARNING]** No Permissions-Policy header — Consider adding a Permissions-Policy header to restrict browser feature access from embedded content.

### CORS Configuration (B — 80/100)

*No CORS headers*

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

---

## Performance

### Page Weight Budget (F — 0/100)

*7.2 MB transferred, 79 requests*

- **[CRITICAL]** Page weighs 9.6 MB (7.2 MB transferred)
- **[WARNING]** Images are 5.4 MB — compress or use modern formats — Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
- **[INFO]** Fonts are 1.1 MB — consider subsetting or using system fonts — Subset fonts to include only used characters, or switch to system font stacks.
- **[INFO]** 79 HTTP requests
- **[INFO]** Estimated 1.5 g CO2 per page load

### Third-Party Impact (A+ — 100/100)

*0% third-party, 0 ms blocking*

- **[INFO]** Third-party code accounts for 0% of page weight (3.1 KiB of 7.2 MiB)
- **[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 (B — 75/100)

*26 images, 0 KB saveable*

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

### JS Execution Cost (F — 20/100)

*8047ms total JS execution*

- **[WARNING]** https://tailwindcss.com/: 3052ms CPU time
- **[WARNING]** https://tailwindcss.com/_next/static/chunks/33e576...: 2180ms CPU time
- **[WARNING]** https://tailwindcss.com/_next/static/chunks/70e258...: 1670ms CPU time
- **[WARNING]** Unattributable: 713ms CPU time
- **[WARNING]** https://tailwindcss.com/_next/static/chunks/612016...: 262ms CPU time
- **[INFO]** Third-party scripts: 713ms (9% of total)

### Font Loading (A+ — 100/100)

*10 fonts (1178 KB)*

- **[INFO]** 10 font(s) use font-display: swap (FOUT risk but functional)

### JS Bundles (B — 80/100)

*20 scripts, 76 KB unused*

- **[WARNING]** https://tailwindcss.com/_next/static/chunks/396c93...: 27 KB unused (96%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://tailwindcss.com/_next/static/chunks/16a6a8...: 25 KB unused (93%) — Consider code splitting or tree shaking to reduce unused code.
- **[WARNING]** https://tailwindcss.com/_next/static/chunks/33e576...: 24 KB unused (34%) — Consider code splitting or tree shaking to reduce unused code.
- **[INFO]** Total unused JavaScript: 76 KB

### 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)

*38 hints, 0 missing preconnects*

- **[PASS]** Page uses 38 resource hint(s)

---

## Content Quality

### Links (A — 95/100)

*157 links checked, 156 healthy, 1 broken*

- **[WARNING]** 156 of 157 links are healthy
- **[WARNING]** Broken link: https://KNPXZI5B0M-dsn.algolia.net — Found in <link href>. Returns HTTP 404.

### Mixed Content (A+ — 100/100)

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

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

### Open Graph (B — 85/100)

*Open Graph tags are partially configured — some improvements recommended.*

- **[INFO]** og:title is long (76 characters) — Titles over 60 characters may be truncated in social sharing previews.
- **[INFO]** Missing og:url — The og:url tag specifies the canonical URL for the shared content.
- **[INFO]** Missing og:type — The og:type tag helps social platforms categorize the content.
- **[INFO]** Missing og:site_name — The og:site_name tag displays the website name in social previews.

### 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+ — 100/100)

*3 A records, 6 ms lookup*

- **[PASS]** Resolves to 3 IPv4 address(es)
- **[PASS]** Has 3 IPv6 (AAAA) record(s)
- **[PASS]** 2 nameserver(s) configured
- **[PASS]** 2 mail exchanger(s) configured
- **[INFO]** CAA records not checked — CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
- **[PASS]** SPF record present in TXT
- **[PASS]** DNS resolution time: 6 ms

### Redirect Chain (A+ — 100/100)

*No redirects — direct access*

- **[PASS]** No redirects — direct access

### IPv6 Readiness (A+ — 100/100)

*IPv6 reachable (1 ms)*

- **[PASS]** IPv6 is configured and reachable at 2606:4700:20::681a:28f, 2606:4700:20::681a:38f, 2606:4700:20::ac43:440b

### Crawlability (B — 75/100)

*no robots.txt, no sitemap*

- **[INFO]** No robots.txt found — robots.txt is optional but recommended. It tells search engine crawlers which pages to index.
- **[INFO]** No sitemap.xml found — A sitemap helps search engines discover and index your pages more efficiently.

### URL Variants (A+ — 100/100)

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

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

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

*tailwindcss.com — via Tucows Domains Inc., 8 years, 10 months old*

- **[PASS]** Domain registered until Jul 20, 2032 (6 years, 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: Tucows Domains Inc.

---

## Compliance

### WCAG Compliance (A+ — 100/100)

*No testable criteria*


### Cookie Consent & Privacy (B — 80/100)

*No consent signals detected*

- **[WARNING]** No privacy policy link detected — A privacy policy page is recommended for transparency and may be legally required.
- **[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

---

## Legal

### Legal Page Ecosystem (F — 0/100)

*0 of 7 expected legal pages detected*

- **[WARNING]** Privacy Policy not detected — No link matching common Privacy Policy URL patterns or link text was found. Most websites are expected to have a Privacy Policy, especially those collecting user data.
- **[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 (A+ — 100/100)

*© 2026 Tailwind Labs Inc*

- **[PASS]** Copyright notice is up to date — Copyright notice is up to date: © 2026 Tailwind Labs Inc
- **[PASS]** Copyright holder: Tailwind Labs Inc

### Regulatory Indicators

*0 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]** No specific regulatory indicators detected — No strong signals for GDPR, CCPA, ADA, PCI, HIPAA, or COPPA were found. This does not mean these regulations don't apply — it means we didn't detect common technical indicators.

### Third-Party Data Sharing

*0 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]** No recognized third-party data-sharing services detected — This page does not appear to load external tracking, analytics, or advertising scripts.

### 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 (A — 85/100)

*Cloudflare (DYNAMIC)*

- **[PASS]** Site is served via Cloudflare CDN (edge: AMS)
- **[INFO]** CDN cache status: DYNAMIC

### HTTP Caching (B — 75/100)

*public, max-age=0, must-revalidate*

- **[PASS]** Cache-Control header is set
- **[PASS]** ETag present — enables conditional (304) responses

---

## Accessibility

### Landmark Structure (D — 45/100)

*1 landmarks*

- **[CRITICAL]** No <main> landmark found — Screen reader users cannot quickly navigate to the primary content. Wrap your main content in <main>.
- **[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)

*16 headings*

- **[PASS]** Single H1 present

### Alt Text Quality (B — 80/100)

*2 of 43 images have issues*

- **[CRITICAL]** 2 image(s) missing alt attribute — Images without alt text are invisible to screen readers.
- **[PASS]** 26 decorative image(s) correctly marked
- **[PASS]** 15 image(s) with good alt text

### Form Accessibility (A+ — 100/100)

*No form controls*

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

### Link & Button Quality (D — 48/100)

*41 issue(s) across 99 links and 16 buttons*

- **[CRITICAL]** 40 link(s) with no accessible text — Links without text are announced as raw URLs by screen readers.
- **[WARNING]** 15 link(s) open in new tab without warning — Add '(opens in new tab)' to link text or aria-label.
- **[CRITICAL]** 1 button(s) with no accessible text
- **[PASS]** 44 link(s) with descriptive text

---

## 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 (B — 80/100)

*8 icon(s) detected*

- **[PASS]** favicon.ico present at site root
- **[PASS]** HTML icon links detected
- **[PASS]** Apple touch icon present
- **[PASS]** Multiple icon sizes detected

### Web Manifest (C — 55/100)

*Valid manifest*

- **[PASS]** Name present: Tailwind CSS
- **[PASS]** 192x192 icon present

### Dark Mode Support (B — 70/100)

*Dark mode detected*

- **[PASS]** Dark-specific theme-color detected — A theme-color with media='(prefers-color-scheme: dark)' adapts the browser toolbar for dark mode.
- **[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 — 5/100)

*No navigation patterns*

- **[PASS]** Hamburger menu detected (responsive design)
- **[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 — 90/100)

*Title: 76 chars*

- **[PASS]** Page title is set
- **[WARNING]** Title is 76 characters — will be truncated in search results
- **[PASS]** Title and H1 are well-aligned

### Content Depth (A — 85/100)

*1258 words, Fairly Difficult*

- **[PASS]** Page has 1258 words — good depth for search engines
- **[INFO]** Text-to-HTML ratio is 1% — Very low ratio suggests heavy framework overhead or boilerplate.
- **[INFO]** Reading level: Fairly Difficult (grade 9)

### Internal Links (A+ — 100/100)

*29 internal, 70 external*

- **[PASS]** 29 internal links (29%)
- **[PASS]** 60% of links use descriptive anchor text
- **[INFO]** 29 internal / 70 external links

### Image SEO (A+ — 95/100)

*43 images, 28 descriptive filenames*

- **[INFO]** 15 image(s) have hash/generic filenames
- **[INFO]** 2 image(s) missing alt text — see Accessibility tab

### Hreflang

*0 hreflang tags*


---

## Sustainability

### CO2 Per Page Load (F — 30/100)

*1.70g CO2 per view*

- **[WARNING]** 1.70g CO2 per page view — This page transfers 7.2 MB, producing an estimated 1.70g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.35g, end-user device 1.30g.
- **[INFO]** At 10,000 monthly views: 203.5 kg CO2/year — With 10,000 page views per month, this page would generate approximately 203.5 kg of CO2 annually — equivalent to charging 25436 smartphones.
- **[PASS]** Green hosting reduces data center emissions

### Green Hosting (A+ — 100/100)

*Green (both)*

- **[PASS]** Both hosting and CDN use renewable energy
- **[INFO]** Next.js: 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 (A+ — 100/100)

*98% cached*

- **[PASS]** 98% reduction on repeat visits — Returning visitors download only 134 KB (vs 7336 KB first visit). 78 of 79 resources are served from browser cache, saving 1.66g CO2 per repeat visit.
- **[INFO]** Repeat visit: 0.03g CO2 (first visit: 1.70g)

### Carbon Budget (F — 30/100)

*81th percentile*

- **[WARNING]** 1.70g CO2 — above the median website (0.60g) — Heavier than an estimated 19% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
- **[INFO]** Estimated 81th percentile — Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.

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

*99% efficient*

- **[PASS]** Transfer efficiency: 99% — Only 76 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/91815bbe-41bf-44c0-9b55-a609ec590f4e*