Slug Generator: How to Turn Any Headline into a Clean, SEO-Friendly URL

A URL slug is the final part of a web address — the bit after the domain name that identifies the specific page. In clickhype.co.uk/bake-sourdough-bread, the slug is bake-sourdough-bread. It is the one part of the address you choose yourself, and once the post is live, it tends to stay with that page for its entire life.

WordPress will invent one for you if you let it, usually by squashing your whole headline into lowercase and hoping for the best. Sometimes that’s fine. Often it produces a rambling, punctuation-strewn address that looks messy in search results and worse when somebody pastes it into a group chat. If you’d rather skip the tidying, our free slug generator turns any headline into a clean slug in one click, stripping out the capitals, spaces and stray characters for you.

Why Slugs Matter (and How Much They Don’t)

Let’s keep this honest from the start: a slug is a small thing. It will not rescue a weak post, and Google has described the words in a URL as a very lightweight ranking signal. Nobody ever reached page one on the strength of a beautiful slug alone.

What a good slug actually earns you is human, not algorithmic:

• Readability. A short, plain slug tells readers what the page is about before they click — in search results, in a browser tab, in a link preview.
• Trust. yoursite.com/best-budget-laptops looks like a page someone cared about. yoursite.com/Best%20Budget_Laptops!!%20(2026) looks like something you’d hesitate to open.
• Shareability. Clean slugs survive being copied into emails, messages and social posts. Slugs full of encoded characters (%20 and friends) get mangled, truncated or broken in transit.

Think of the keyword in your slug as a small label on a folder: it helps people — and, at the margins, search engines — file the page correctly. That’s the whole job. Do it well once, and you never think about it again.

The Rules of a Good Slug

Six rules cover nearly every case:

1. Lowercase, always. Capitals in URLs are inconsistent across servers and invite duplicate-address confusion. Lowercase removes the question entirely.
2. Hyphens, not underscores. Google reads a hyphen as a separator between words, so bake-sourdough-bread is understood as three words. An underscore joins instead — bake_sourdough_bread is effectively read as one long blob, bakesourdoughbread.
3. Short but complete. Three to five words is the usual sweet spot: long enough to describe the page, short enough to read at a glance.
4. Include the main keyword naturally. If the post targets “budget laptops for students”, the slug best-budget-laptops-students keeps that promise. Don’t stuff — one clear topic, said once.
5. Leave out dates and fast-ageing numbers. A slug called best-laptops-2026 needs surgery every January, and changing slugs is exactly what you want to avoid (more on that below). “Best of the year” belongs in the title and the content, where you can update it freely.
6. No spaces or special characters. Spaces get encoded as %20, and characters like &, ? and # have jobs of their own inside URLs. They break links, confuse sharing tools and look dreadful.

Here’s what those rules do to real headlines:

Notice how much gets thrown away: the first person, the clickbait, the punctuation, the year. That’s the point. A slug is a label, not a headline — the persuasion happens in the title, the filing happens in the URL.

A quick word about stop words

Old SEO advice insists you strip out little joining words — the, a, an, how, to — as if Google bills you per word. It doesn’t. A slug like how-to-bake-sourdough-bread is perfectly fine with “how” in it, and removing stop words can occasionally leave something that reads oddly or loses meaning.

The truth is duller: removing them is optional tidiness. Do it when a slug is running long and the little words are padding; leave them when they make the slug read naturally. Worrying about stop words beyond that is superstition, not SEO.

Slugs in WordPress: Permalinks and Where to Edit Them

In WordPress, slugs sit inside your permalink structure — the template every URL on the site follows. Under Settings → Permalinks, “Post name” is the sane choice for almost every blog: yoursite.com/bake-sourdough-bread, nothing wasted. The dated structures (/2026/10/31/…) bake a calendar into every address, and “Plain” gives you the dreaded ?p=123, which tells readers nothing.

You can set or fix a post’s slug individually, just under the title in the classic editor or in the URL panel of the block editor. WordPress drafts one from your headline the first time you save — which is why generating a proper slug before you publish, rather than accepting the auto-draft, is worth the ten seconds.

One structure deserves a second thought: including the category, as in yoursite.com/blogging-tips/bake-sourdough-bread. The upside is context — readers and search engines can see where the post sits. The downsides are longer URLs and a hidden trap: if you later move the post to a different category, its URL changes, and URL changes are where the trouble in the next section lives. Most blogs are better off with the short version.

Getting permalink structure and slugs set up properly is one part of a wider technical tidy-up — our WordPress technical SEO checklist walks through permalinks alongside canonical tags, sitemaps and the rest of the foundations, in the order worth doing them.

How to Use the Slug Generator

Open the slug generator and paste in your headline — or, if the headline isn’t final yet, the words you know the post will be about. A slug built from the topic survives a headline rewrite, which is another reason not to weld the two together.

1. Paste or type the text. The generator lowercases it, removes punctuation and swaps spaces for hyphens.
2. Use the options if you need them. There’s a remove-stop-words toggle for when the result runs long, and a maximum length setting if you want a hard cap.
3. Read the result out of context. Would this slug make sense pasted into a message with nothing around it? If yes, you’re done.
4. Paste it into the slug field in WordPress — before publishing, not after.

One detail the generator handles automatically: everything comes out lowercase. That matters because headlines often aren’t. If a headline is drafted in Title Case for the page, the slug still takes the lowercase version — and if you’re tidying headline text itself for a social post or a document, a case converter flips between title case, sentence case and lowercase in seconds. Just never paste a capitalised slug into WordPress by hand.

Finally, once the post is live, it’s worth running the finished page through a meta checker now and then to confirm the title, description and canonical URL all point where you expect — the slug is part of that canonical address, so it’s a good early-warning check if anything has drifted.

The Big Warning: Changing a Slug Changes the Address

Everything above is calm, low-stakes tidying — as long as the post hasn’t been published yet. Afterwards, the stakes change completely, because a slug is not a nickname. It is the address.

Change the slug on a live, indexed post and the page moves. The old URL now returns a 404 error. Every bookmark, every link you shared, every backlink another site gave you points at an address that no longer exists — and the ranking your post built up at the old address doesn’t politely forward itself. Google can eventually work out what happened, but “eventually, maybe, after losing ground” is not a strategy.

WordPress does sometimes rescue changed post slugs with an automatic redirect, and some plugins add their own. Sometimes. Relying on it is how sites end up with a graveyard of 404s nobody noticed for six months. If you genuinely must change a live slug — a rebrand, a badly wrong keyword, a merged post — do it properly:

1. Copy the old URL down first. You can’t redirect an address you’ve forgotten.
2. Change the slug in the editor and check the new page loads correctly.
3. Add a 301 redirect from the old URL to the new one — a permanent “this page has moved” instruction. Most SEO plugins have a redirect manager built in; there are dedicated redirection plugins too.
4. Update your own internal links to point at the new URL, so your site isn’t relying on its own redirects.
5. Test the old URL. Paste it into a browser. You should land on the new page, not an error.

Better still: get the slug right in the ten seconds before you press Publish, and you never need any of this.

Common Slug Mistakes

• Publishing the raw auto-slug. A fifteen-word headline becomes a fifteen-word URL. Nobody reads it, nobody trusts it.
• Underscores. bake_sourdough_bread reads as one glued-together word to search engines. Hyphens separate; underscores stick.
• Putting the year in. best-cameras-2026 is fresh for twelve months and an embarrassment forever after.
• Keyword stuffing. best-cheap-laptops-best-budget-laptops-cheap is not thorough — it’s a slug shouting, and it reads as spam.
• Meaningless slugs. /post-2, /article, /new — technically valid, useless to everyone.
• “Tidying” old slugs during a redesign. The most expensive mistake on this list, because every tidy-up is a bundle of URL changes. See the warning above.

Frequently Asked Questions

Should my slug match my post title exactly?

Almost never. Titles are written to persuade humans and can be as long as they need to be; slugs are labels. Keep the topic and the main keyword, drop the drama, the questions and the punctuation.

Do keywords in a slug help my ranking?

Only slightly. Google treats URL words as a very light relevance clue, worth having if it comes naturally, never worth stuffing or restructuring a site over. The bigger win is human: a clear slug gets read, trusted and shared.

How long should a slug be?

There’s no official limit, but three to five descriptive words is the practical range for most posts. If you can say what the page is in fewer, do. If the slug needs a scroll bar, it needs an edit.

Can I change a slug after publishing?

Yes — but only with a 301 redirect from the old URL to the new one, set up at the same time. Without it, the old address 404s, links break, and the post can lose the ground it had earned. Never change live slugs casually.

Should I remove stop words like “the” and “how”?

Only if it makes the slug shorter without making it stranger. Google doesn’t penalise stop words in URLs, and how-to-bake-sourdough-bread is fine as it stands. It’s a tidiness choice, not an SEO rule.

Final Thoughts

A slug is a small decision with a long shadow. Get it right and it quietly works for the life of the post — readable in search results, safe to share, easy to file. Get it wrong after publishing and the fix involves redirects, broken links and crossed fingers.

So make it a habit rather than a task: draft the headline, run it through the slug generator, glance at the result, paste it in, publish. Ten seconds at the one moment when changing it costs nothing at all.