What makes a URL SEO-friendly?

An SEO-friendly URL is short (under 60 characters ideally), descriptive, lowercase, and uses hyphens as word separators. It includes the primary keyword near the beginning, avoids parameters and session IDs, and follows a logical site hierarchy. Google's guidelines recommend simple, human-readable URLs that convey the page's content at a glance.

// SEO-friendly URL best practices

// ✅ Good SEO URLs
/blog/typescript-6-migration-guide       // descriptive, hyphenated
/tools/json-formatter                     // short, keyword-rich
/docs/api/authentication                  // hierarchical structure

// ❌ Bad SEO URLs
/page?id=1234                            // no keywords
/blog/post_title_here_2024_01_15_v2      // too long, underscores
/Blog/TypeScript-Guide                   // mixed case

// JavaScript — generate SEO slug with max length
function seoSlug(text, maxLen = 60) {
  return slugify(text).substring(0, maxLen).replace(/-$/, "");
}

Common use cases

SEO teams use URL generators when planning site architecture and URL structures for new sections. Developers integrate URL generation logic into CMS platforms and headless content APIs. Content writers verify their proposed titles will produce clean URLs before publishing. Migration specialists map old dynamic URLs to new SEO-friendly patterns during site redesigns.