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How do I convert text to a URL slug online?

Paste any text and instantly get a clean, URL-friendly slug with lowercase letters, hyphens, and no special characters. The tool handles Unicode, transliterates accented characters, and supports bulk conversion. Copy with one click. Everything runs in your browser.

Blog post title to slug
Input
How to Fix "Invalid JSON" Errors in 2024
Output
how-to-fix-invalid-json-errors-in-2024
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URL Slug Generator

Convert text into clean, URL-friendly slugs. Handles Unicode, transliteration, and stop words.

Examples

How to Build a REST API with Node.jshow-to-build-a-rest-api-with-node-js
Les Misérables — Victor Hugoles-miserables-victor-hugo
10 Günter's Tips & Tricks for CSS!10-gunter-s-tips-tricks-for-css
Привет мир (Hello World)hello-world

About URL Slugs

  • A URL slug is the part of a URL that identifies a page in human-readable form — e.g. /blog/how-to-build-a-rest-api.
  • Unicode characters like accented letters (é, ñ, ü) are transliterated to their ASCII equivalents for maximum compatibility.
  • Stop words (a, the, in, of, etc.) can be removed to create shorter, cleaner URLs that rank better for SEO.
  • Everything runs in your browser — no data is sent over the network.

Tips & Best Practices

Pro Tip

Keep slugs under 75 characters for SEO

Google displays about 75 characters of URL in search results before truncating. Shorter slugs are easier to share, copy, and remember. Remove stop words (the, a, an, in, of, for) and use 3-5 keywords maximum: /tools/json-formatter not /tools/the-best-json-formatter-and-validator-tool-for-developers.

Common Pitfall

Changing slugs breaks existing links — always redirect

Every external link, bookmark, and search engine index points to your current URL. Changing a slug without a 301 redirect creates 404 errors and loses accumulated SEO authority. In Next.js, add redirects in next.config.ts. Always maintain a redirect map for renamed pages.

Real-World Example

Handle Unicode slugs with transliteration, not removal

"Über die Brücke" should become uber-die-brucke, not -die-br-cke. Use a transliteration library (speakingurl, limax, slugify) that converts ü→u, ñ→n, é→e, ø→o. For CJK content, consider Pinyin romanization or keeping Unicode in the URL (modern browsers display it properly).

Security Note

Validate slugs to prevent path traversal

User-generated slugs like ../../../etc/passwd or ..\windows\system32 can enable directory traversal if used directly in file paths. Always sanitize: remove dots, slashes, and backslashes. Validate against a strict regex like /^[a-z0-9]+(?:-[a-z0-9]+)*$/ and never use slugs to construct file system paths without validation.

Frequently Asked Questions

What is a URL slug and why does it matter for SEO?
A URL slug is the human-readable portion of a URL identifying a specific page, like 'how-to-use-git' in example.com/blog/how-to-use-git. Slugs matter for SEO because search engines use them to understand page content. A descriptive slug with relevant keywords helps rankings. Best practices: use lowercase, separate words with hyphens, keep it to 3-5 words, remove stop words, and avoid special characters. Clean slugs also improve link sharing and user trust.
How do I handle Unicode and special characters in URL slugs?
Unicode characters are typically transliterated to ASCII equivalents. Accented characters like e-acute become 'e', German umlauts like u-umlaut become 'ue'. CJK characters can use romanization systems. DevBolt handles transliteration automatically for common character sets. ASCII-only slugs ensure maximum compatibility across all systems, email clients, and social media platforms where URLs might be shared or truncated.
Should I use hyphens or underscores in URL slugs?
Use hyphens (-). Google treats hyphens as word separators, so 'web-development' is indexed as two separate words. Underscores are treated as joiners, so 'web_development' is indexed as one compound word, reducing search relevance. This distinction was confirmed by Google and remains the standard recommendation. Most CMS platforms and URL slug libraries default to hyphens for this reason.

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