Guide
How to Create a URL Slug
A URL slug is the human-readable part of a URL that identifies a specific page — like /how-to-create-url-slugs in this very URL. Good slugs help users, search engines, and social sharing. This guide covers the rules and best practices.
Last updated: April 10, 2026
What Is a URL Slug?
In the URL https://example.com/blog/how-to-bake-sourdough, the slug is how-to-bake-sourdough. It's the last path segment that identifies this particular page.
Slugs originated in newspaper publishing — a 'slug' was a short name for an article used during production. On the web, they serve the same purpose: a short, readable identifier for a page's content.
Why Slugs Matter for SEO
- Search engines use the URL as a relevance signal. A slug containing your target keywords helps search engines understand what the page is about.
- Users are more likely to click a search result with a readable URL. /guides/how-to-bake-sourdough is more inviting than /page?id=3847.
- Social sharing: When URLs are shared on social media or in messages, a clean slug communicates the page's content before anyone clicks.
- Link trust: People are more likely to click a URL they can read and understand. Spammy or random-looking URLs reduce trust.
URL Slug Rules
- Lowercase only. URLs are case-sensitive on most servers. Use all lowercase to avoid confusion and duplicate-content issues.
- Hyphens as separators. Use - between words, not underscores _ or spaces. Google treats hyphens as word separators but treats underscores as joiners.
- No special characters. Remove punctuation, accents, symbols, and non-ASCII characters. Convert ñ to n, ü to u, etc.
- No stop words (usually). Words like a, the, is, and, or, of add length without adding meaning. /how-to-bake-bread is better than /how-to-bake-a-loaf-of-bread.
- Keep it short. 3-5 words is ideal. Long slugs get truncated in search results and are harder to remember.
- No trailing slashes inconsistency. Pick one convention (with or without trailing slash) and stick with it site-wide.
Examples: Good vs Bad Slugs
- Good: /guides/compound-interest-calculator → Short, descriptive, uses keywords.
- Bad: /guides/How_To_Use_Our_Amazing_Compound_Interest_Calculator_Tool → Too long, underscores, mixed case, unnecessary words.
- Good: /tools/json-formatter → Clear, concise.
- Bad: /tools/tool.php?type=json&action=format → Query parameters, file extension, not readable.
- Good: /blog/sourdough-starter-recipe → Descriptive, keyword-rich.
- Bad: /blog/post-42 → Tells the user nothing about the content.
Handling Edge Cases
- Numbers are fine: /guides/top-10-css-tricks is perfectly valid.
- International content: Transliterate non-Latin characters to ASCII. München → munchen.
- Duplicate slugs: If two pages would have the same slug, add a distinguishing word or number: /review/iphone-15 vs /review/iphone-15-pro.
- Changing slugs: If you rename a page's slug, set up a 301 redirect from the old URL to the new one. Broken links hurt SEO.
Using Our URL Slug Generator
Paste any title, heading, or phrase into our free URL Slug Generator and get a clean, SEO-friendly slug instantly. It handles lowercasing, removing special characters, replacing spaces with hyphens, and trimming unnecessary words.
Use it when publishing blog posts, creating product pages, or setting up any new URL that needs to be clean and readable.
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