What a slug is
A slug is the readable part of a URL that identifies a page — the bit after the last slash, like /slug-generator. A good slug uses only safe characters: lowercase letters, numbers and a separator. Turning a title into one (often called slugify) follows a few steps:
Accented letters are reduced to their plain form (é → e), anything that isn't a letter, number or space is dropped, and runs of spaces collapse to a single separator. The result is short, clean and safe to put in a link.
Worked example
Turning "10 Best Calculators for 2026 — Free & Fast!" into a slug:
10-best-calculators-for-2026-free-fast.Slug best practices
Keep slugs short and descriptive — a few meaningful words beat a whole sentence. Use hyphens (search engines treat them as word separators, unlike underscores), stick to lowercase to avoid duplicate-URL confusion on case-sensitive servers, and include your main keyword. You can optionally drop filler "stop words" like a, the and of for a tighter slug. Once a page is published, avoid changing its slug, since that breaks existing links unless you set up a redirect.