What Is a URL Slug?
Updated 2026-07-04 · By the MakeToolz team
Quick answer: a URL slug is the part of a web address that comes after the domain and names a specific page. In this page's address it is the /what-is-a-url-slug at the end. Good slugs are short, lowercase, hyphen-separated, and built around a keyword. You can make one in a click with our URL Slug Generator.
Think of the slug as a page's readable nickname. It tells a reader and a search engine what the page is about before they even click. A clear slug looks trustworthy. A messy one looks like spam.
Where the slug lives in a URL
A web address has several parts. Take https://maketoolz.com/blog/what-is-a-url-slug and split it up:
- https:// is the protocol.
- maketoolz.com is the domain.
- /blog/ is the folder or path.
- what-is-a-url-slug is the slug.
The slug is the piece you choose. The domain is fixed and the folder is set by your site structure, but the slug is yours to write. Most content systems create a slug automatically from your page title, and most let you edit it by hand.
Why slugs matter for SEO
A slug is a small ranking signal, not a magic switch. It helps in three practical ways.
- Clarity. Both readers and search engines read the slug to guess what a page covers.
/what-is-a-url-slugtells you everything./post?id=48213tells you nothing. - Keywords. Putting your main keyword in the slug reinforces what the page is about. It is a light signal, but a real one, and it is easy to get right.
- Shareability. A clean slug looks safe when someone pastes it into a chat, a forum, or a social post. A slug full of numbers and symbols makes people hesitate to click.
None of these signals wins a ranking on its own. Content and links matter far more. But a good slug is free to write and costs you nothing, so there is no reason to leave it messy.
What makes a good slug
- Lowercase. Mixed case can create duplicate URL problems on some servers, where
/Pageand/pageare treated as two different addresses. Lowercase avoids that. - Hyphens, not underscores. Google reads hyphens as spaces between words. It reads underscores as joiners. So
url-slugcounts as two words, whileurl_slugcounts as one. Use hyphens. - Short. Aim for three to five meaningful words. Drop filler like "a", "the", "of", and "and". A tight slug reads better and shares better.
- Keyword-focused. Lead with the term you want the page to rank for. Put the important word near the front.
- No special characters. Strip punctuation, emoji, and accents. Turn cafe into
cafe, notcaf%C3%A9, which is what an accented letter becomes in a URL.
Doing all of this by hand is fiddly, especially the accent stripping and symbol removal. Our Slug Generator applies every rule at once. Paste a title and it lowercases the text, converts accents to plain letters, removes symbols, drops filler, and joins the words with hyphens.
Good slugs versus bad slugs
Seeing them side by side makes the rules stick:
- Good:
/best-running-shoes(clear, keyword first, readable). - Good:
/how-to-tie-a-tie(matches how people search). - Good:
/top-10-tools(a number that adds meaning is fine). - Bad:
/index.php?p=1123&cat=7(no keywords, not readable, looks like code). - Bad:
/The_Best_Running_Shoes_For_2026!!!(uppercase, underscores, and symbols).
The good ones read like a phrase a person would say. The bad ones read like machine output.
Should you change an existing slug?
Be careful here. Changing a live page's slug changes its URL. Every old link, bookmark, and search result still points to the old address, which now leads nowhere. That breaks links and can lose the rankings the page already earned.
If you must change a published slug, set up a 301 redirect from the old slug to the new one. A 301 tells browsers and search engines that the page moved for good, so it passes most of the old page's ranking value to the new URL. Without that redirect, you risk a broken page and lost traffic.
For brand new pages that no one has linked to yet, edit the slug freely. The risk only applies once a page is public and gathering links.
People Also Ask
What is a slug in simple terms?
It is the readable nickname for a page inside its web address. It is the words after the last slash that tell you what the page is about. For a blog post about tying a tie, the slug might be how-to-tie-a-tie.
Where does the word "slug" come from?
It comes from newspaper publishing. A "slug" was the short name an editor gave a story while it was being written and laid out. The web borrowed the word for the short name of a page in its URL.
Can a slug have numbers?
Yes. Numbers are fine when they add meaning, like /top-10-tools or a year in /guide-2026. Avoid meaningless database ID numbers such as /post-48213, since those tell readers nothing.
How do I create a slug?
Take your title, make it lowercase, remove punctuation, drop filler words, and join the key words with hyphens. Or paste the title into our Slug Generator and it does all of that in one click.
What is the difference between a slug and a URL?
The URL is the whole web address. The slug is just the last, page-naming part of it. Every URL contains a slug, but the slug is only one piece of the full address, alongside the protocol, domain, and folder.
How long should a URL slug be?
Keep it to three to five meaningful words. Shorter slugs are easier to read, easier to share, and less likely to get cut off in search results. Cut any word that does not help someone understand the page.
Do slugs need to match the page title exactly?
No. The slug should reflect the topic, but it does not have to copy the title word for word. Titles are often longer and include filler. A good slug trims the title down to its core keywords.
Are underscores or hyphens better for slugs?
Hyphens. Search engines treat a hyphen as a word separator, so each word is read on its own. Underscores glue words together into one term, which weakens keyword clarity. Always separate words with hyphens.
Want a clean slug without checking every rule by hand? Paste your title into our free URL Slug Generator and get a lowercase, hyphenated, keyword-ready slug in one click.