URL Redirect Types: 301 vs 302 - SEO Redirection Strategies

Learn the differences between 301 and 302 redirects, their SEO impact, and correct usage scenarios. Avoid redirection mistakes.

URL redirects are a critical part of website management. Choosing the correct redirect type directly affects your SEO performance. In this guide, we examine all redirect types and usage scenarios in detail.

HTTP Redirect Codes

3xx Status Code Family

HTTP 3xx codes indicate that the resource has moved to another location:

• 300: Multiple Choices
• 301: Moved Permanently
• 302: Found (Temporary)
• 303: See Other
• 304: Not Modified (cache)
• 307: Temporary Redirect
• 308: Permanent Redirect

301 Permanent Redirect

When to Use?

• When a page permanently moves to a new URL
• During domain changes
• HTTP to HTTPS migration
• When URL structure changes permanently
• Consolidating www and non-www

SEO Effects

• 90-99% of link juice is transferred
• Search engines remove old URL from index
• New URL inherits ranking power
• Considered permanent

Implementation Examples

Apache (.htaccess)

# Single page redirect
Redirect 301 /old-page /new-page

# Domain change
RewriteEngine On
RewriteCond %{HTTP_HOST} ^olddomain\.com$ [NC]
RewriteRule ^(.*)$ https://newdomain.com/$1 [R=301,L]

# HTTP to HTTPS
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

Nginx

server {
    listen 80;
    server_name olddomain.com;
    return 301 https://newdomain.com$request_uri;
}

# Single page redirect
location = /old-page {
    return 301 /new-page;
}

PHP

<?php
header("HTTP/1.1 301 Moved Permanently");
header("Location: https://example.com/new-page");
exit();
?>

JavaScript (Client-side - Not Recommended)

// Use only when necessary
window.location.replace("https://example.com/new-page");

302 Temporary Redirect

When to Use?

• Page is temporarily elsewhere
• During A/B testing
• Showing maintenance page
• Geo-targeting redirects
• Mobile device redirects

SEO Effects

• Limited link juice transfer
• Original URL stays in index
• Treated as temporary state
• Can cause issues if used long-term

Implementation Examples

# Apache
Redirect 302 /promo /campaign-page

# Nginx
location = /promo {
    return 302 /campaign-page;
}

# PHP
<?php
header("HTTP/1.1 302 Found");
header("Location: /campaign-page");
exit();
?>

307 and 308 Redirects

307 Temporary Redirect

Modern version of 302. Preserves HTTP method (POST stays POST).

# Nginx
location /api/old {
    return 307 /api/new;
}

308 Permanent Redirect

Modern version of 301. Preserves HTTP method.

# Nginx
location /api/v1 {
    return 308 /api/v2;
}

Comparison Table

Common Mistakes and Solutions

1. Wrong Redirect Type Selection

Mistake: Using 302 for permanent moves

Solution: Always use 301 for permanent changes

2. Redirect Chains

Mistake: Chain like A → B → C → D

Solution: Direct redirect A → D

# Bad
/page-v1 → /page-v2 → /page-v3

# Good
/page-v1 → /page-v3
/page-v2 → /page-v3

3. Redirect Loops

Mistake: A → B → A (infinite loop)

Solution: Carefully check redirect rules

4. Trailing Slash Issues

# Make consistent
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_URI} !(.*)/$
RewriteRule ^(.*)$ https://%{HTTP_HOST}/$1/ [R=301,L]

SEO Best Practices

1. Update sitemap: Update sitemap after redirects
2. Fix internal links: Update internal links to new URLs
3. Search Console notification: Notify Google of URL changes
4. Backlink tracking: Redirect important backlinks to new URL
5. Canonical tag usage: Use canonical tags with redirects

Redirect Testing Tools

• Redirect Checker: Check HTTP status codes
• Screaming Frog: Bulk redirect analysis
• Google Search Console: Monitor crawl errors
• curl command: Quick terminal check

# Test with curl
curl -I https://example.com/old-page

# Follow redirect chain
curl -IL https://example.com/old-page

Conclusion

Choosing the right redirect type is critical for your SEO success. Use 301 for permanent changes, 302 for temporary situations. Avoid redirect chains and test your changes regularly. Support SEO-friendly URLs created with SlugURL with proper redirects to maintain your search engine rankings.