Slug Generator

What Is a URL Slug?

A URL slug is the part of a web address that identifies a specific page in a human-readable format. For example, in example.com/blog/my-first-post, the slug is my-first-post. Clean, descriptive slugs help search engines understand your content and improve click-through rates.

How It Works

1. Normalize — Convert to lowercase, replace accented characters (é→e, ñ→n, ü→u)
2. Clean — Remove HTML tags, special characters, and extra whitespace
3. Separate — Replace spaces and word boundaries with your chosen separator
4. Optional — Remove common stop words (a, an, the, and, or, etc.)
5. Trim — Respects max length at word boundaries (doesn't cut in the middle of words)

All processing is deterministic — zero AI, zero hallucination. Same input always produces the same slug.

Why AI Can't Generate Reliable Slugs

AI language models (ChatGPT, Claude, Gemini) are trained to predict the next word, not to apply deterministic string transformations. Common failures:

• Inconsistent handling of special characters (&, %, #, @)
• Wrong Unicode normalization (é→e vs keeping é)
• Hallucinated word replacements (changes "color" to "colour" based on training data)
• Inconsistent separator usage within the same batch
• Can't process hundreds of titles at once with consistent rules

Frequently Asked Questions

What characters are allowed in a URL slug?

URL slugs should only contain lowercase letters (a-z), numbers (0-9), and hyphens (-). No spaces, special characters, or uppercase letters. This tool automatically removes or replaces disallowed characters.

Should I use hyphens or underscores in URLs?

Google recommends hyphens (-) over underscores (_). Hyphens are treated as word separators, helping search engines understand individual words. Underscores are not treated as separators — "my_post" is read as "mypost". This tool defaults to hyphens for this reason.

What are stop words and should I remove them?

Stop words are common words like "a", "an", "the", "and", "or", "in", "on", "of", "to", "for", "is", "it", "at", "by". Removing them creates shorter, cleaner slugs without losing meaning. For example, "The Best Guide to SEO" becomes "best-guide-seo" rather than "the-best-guide-to-seo".

What is the ideal slug length for SEO?

Keep slugs under 60 characters when possible. Short, descriptive slugs (3-5 words) are best for SEO and user readability. Google truncates URLs in search results after about 60 characters.

Does this tool store my text on a server?

No. Everything runs entirely in your browser. Your text never leaves your device — no data transmission, no storage, no third-party servers. 100% private.

Can I bulk convert hundreds of titles?

Yes! Switch to Bulk mode and paste one title per line. Click "Generate All" to convert every title at once with identical slug rules. Copy all results with one click.