vuadonggoi.com — Website Report

Enable HTTP Strict Transport Security to force HTTPS connections.

# Nginx:
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

# Apache (.htaccess):
Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains"

# Next.js (next.config.js headers):
{ key: 'Strict-Transport-Security', value: 'max-age=31536000; includeSubDomains' }

Add a Content-Security-Policy header to prevent XSS and injection attacks.

# Nginx:
add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline';" always;

# Apache (.htaccess):
Header set Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline';"

# Next.js (next.config.js headers):
{ key: 'Content-Security-Policy', value: "default-src 'self'; script-src 'self' 'unsafe-inline'" }

Server responded in 5.3s. Aim for under 200ms Time to First Byte (TTFB). Check your server configuration, database queries, and hosting performance.

16 scripts without async or defer attributes. These block page rendering. Add defer or async to non-critical scripts.

Set X-Content-Type-Options: nosniff to prevent MIME-type sniffing.

# Nginx:
add_header X-Content-Type-Options "nosniff" always;

# Next.js (next.config.js headers):
{ key: 'X-Content-Type-Options', value: 'nosniff' }

Set X-Frame-Options to prevent clickjacking attacks.

# Nginx:
add_header X-Frame-Options "SAMEORIGIN" always;

# Next.js (next.config.js headers):
{ key: 'X-Frame-Options', value: 'SAMEORIGIN' }

Add a Referrer-Policy header to control information leakage.

# Nginx:
add_header Referrer-Policy "strict-origin-when-cross-origin" always;

# Next.js (next.config.js headers):
{ key: 'Referrer-Policy', value: 'strict-origin-when-cross-origin' }

Add a Permissions-Policy header to control browser feature access.

# Nginx:
add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;

# Next.js (next.config.js headers):
{ key: 'Permissions-Policy', value: 'camera=(), microphone=(), geolocation=()' }

Your title is 64 characters. Keep it under 60 for best display in search results.

Found 1 of 118 images without alt attributes. Alt text is critical for accessibility (screen readers) and SEO (image search).

1 of 118 images have no alt attribute. Screen readers cannot describe these images to visually impaired users.

Heading hierarchy jumps from H2 to H5. Don't skip heading levels — this confuses screen readers and assistive technology.

Some text appears to use light colors that may not have sufficient contrast against the background. WCAG requires a minimum 4.5:1 contrast ratio.

Your HTML is 309KB. Large HTML documents take longer to parse. Consider lazy loading content or splitting into multiple pages.

Loading 13 CSS files. Each blocks rendering. Consider combining stylesheets or inlining critical CSS.

117 images don't use loading="lazy". Add lazy loading to below-the-fold images to improve initial page load.

Add more internal links to help search engines discover and index your other pages. Internal linking also helps distribute page authority.

Found 12 elements with large inline styles. Move these to external CSS for better caching and maintainability.

Found 21 HTML comments. Remove unnecessary comments in production to reduce file size.