Slug Generator
Generate URL-friendly slugs from text for SEO-friendly URLs.
All Variants
What Is a URL Slug?
A URL slug is the human-readable, URL-friendly portion of a web address that identifies a specific
page. For example, in https://example.com/blog/how-to-use-docker,
the slug is how-to-use-docker. Slugs are created by converting titles or phrases
into lowercase, hyphen-separated strings with only URL-safe characters.
How Slug Generation Works
The process typically involves these steps:
- Convert to lowercase: "How to Use Docker" → "how to use docker"
- Replace spaces with hyphens: "how to use docker" → "how-to-use-docker"
- Remove special characters: Strip punctuation, symbols, and non-ASCII characters.
- Transliterate accented characters: "ü" → "u", "ñ" → "n", "é" → "e"
- Collapse multiple hyphens: "hello---world" → "hello-world"
- Trim leading/trailing hyphens: "-hello-" → "hello"
Why Do Slugs Matter?
- SEO: Search engines use URL slugs as a ranking signal. Descriptive slugs containing target keywords improve search visibility.
- User Experience: Clean, readable URLs help users understand what a page is about before clicking.
- Social Sharing: Links with descriptive slugs look more professional and trustworthy when shared on social media.
- Accessibility: Screen readers can read descriptive slugs, providing context about the link destination.
- Permanence: Well-designed slugs remain meaningful even if you restructure your site's navigation.
Slug Best Practices
| Practice | Good Example | Bad Example |
|---|---|---|
| Use descriptive words | getting-started-with-react | post-12345 |
| Keep it short | docker-compose-guide | the-complete-beginners-guide-to-docker-compose-in-2024 |
| Use hyphens, not underscores | url-slug-generator | url_slug_generator |
| Omit stop words | css-grid-layout | a-guide-to-the-css-grid-layout |
Frequently Asked Questions
Why use hyphens instead of underscores?
Google treats hyphens as word separators but treats underscores as word joiners. web-design
is interpreted as "web" and "design" (two words), while web_design is interpreted as
"webdesign" (one word). Hyphens are the SEO-recommended separator.
Should I change slugs after publishing?
Avoid changing slugs for published content, as it breaks existing links and SEO value. If you must change a slug, set up a 301 redirect from the old URL to the new one.