Normalizer
URL normalizer online. Normalize URLs: lowercase hostname, sort query params, remove defaults. Standardize URLs for comparison—free browser tool.
URL to Normalize
Normalized URL
Why Normalize URLs?
- • Caching: Same content, same URL
- • Comparison: Compare URLs reliably
- • SEO: Avoid duplicate content issues
Features
- Normalize URLs to standard format
- Lowercase scheme and host
- Remove default ports (80, 443)
- Sort query parameters alphabetically
- Remove unnecessary slashes
- Decode percent-encoded characters
Common Use Cases
- Compare URLs for equality
- Deduplicate URLs in databases
- Standardize URLs for caching
- Normalize URLs for analytics
- Clean up scraped URLs
URL Normalization
URL normalization converts URLs to a standard format so that equivalent URLs are represented identically. This is crucial for caching, deduplication, and comparison.
Normalization rules:
- Lowercase protocol & host - HTTP:// → http://, Example.COM → example.com
- Remove default ports - :80 for HTTP, :443 for HTTPS
- Sort query params - ?b=2&a=1 → ?a=1&b=2
- Remove trailing slash - /page/ → /page (optional)
- Decode unreserved chars - %7E → ~, %2D → -
- Remove empty params - ?key=&foo= → (removed)
Example:
Before: HTTP://Example.COM:80/Path?b=2&a=1 After: http://example.com/Path?a=1&b=2
Use cases: Prevent duplicate cache entries, merge identical URLs from different sources, improve URL comparison speed.
Examples
Before: HTTP://Example.COM/page
After: http://example.com/pageBefore: https://example.com:443/api
After: https://example.com/apiBefore: https://api.com/search?sort=date&q=test&limit=10
After: https://api.com/search?limit=10&q=test&sort=dateFrequently Asked Questions
Normalization ensures that equivalent URLs are identical. Without it, example.com and Example.COM are treated as different URLs, causing duplicate cache entries, broken deduplication, and inefficient databases.
No. Normalization preserves the URL's meaning. Lowercasing the host, removing default ports, and sorting query params don't change what the URL points to. However, path is case-sensitive on some servers.
Yes. Store normalized URLs in databases to avoid duplicates and improve query performance. Normalization also helps with caching keys, analytics, and URL-based deduplication.
Trailing slashes are tricky. On some servers, /page and /page/ are different resources. Our normalizer offers an option to remove trailing slashes, but use it carefully based on your server's behavior.
Yes! Sorting query parameters alphabetically ensures that ?b=2&a=1 and ?a=1&b=2 result in the same normalized URL. This is safe because parameter order doesn't matter for most APIs.