Create a simple URL slug

Normalize a Latin-text label into lowercase ASCII words separated by hyphens.

JavaScript Version 1.0.0 · MIT · .md

function slugify(value) { return value.normalize('NFKD').replace(/[\u0300-\u036f]/g, '').toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/^-|-$/g, ''); }

Input & expected output

"Your order 8812 is out for delivery!"

"your-order-8812-is-out-for-delivery"

The edge case

"Café déjà vu"

"cafe-deja-vu"

Know the limits

• This deliberately produces ASCII slugs. Many non-Latin scripts become empty.
• It does not guarantee uniqueness; preserve stable slugs separately from titles.

The function above is the implementation used by the lab. The lab validates JSON types and caps size before execution; include equivalent validation when accepting untrusted input in your application.

Keep exploring

• Capitalize a string — Uppercase the first Unicode code point and preserve the remaining text.
• Reverse a string — Reverse Unicode code points without splitting surrogate pairs.
• Check a palindrome — Compare a string with its code-point reversal.