SEO-Friendly URLs: How to Write Slugs That Rank

URLs are easy to overlook, but they do real work. A clean, descriptive URL helps search engines understand your page, reassures people before they click, and looks trustworthy when shared. A messy one does the opposite. Here's how to get slugs right.

What is a slug?

The slug is the human-readable part of a URL that identifies a specific page — usually everything after the final slash. In example.com/blog/seo-friendly-urls, the slug is seo-friendly-urls. It's the part you have the most control over, and the part that matters most for readability.

Why slugs matter for SEO

• They describe the page. Keywords in the URL give search engines an extra, clear signal about the topic.
• They build trust. A readable URL in the search results tells users what to expect, improving click-through rates.
• They travel well. When someone pastes your link into a chat or forum, a descriptive slug acts as a preview of the content.

The rules of a good slug

• Use lowercase. Some servers treat /Page and /page as different URLs, which causes duplicate-content headaches.
• Separate words with hyphens. Google reads hyphens as spaces; it does not reliably split words joined by underscores.
• Keep it short. Include your main keyword and drop filler words like "the", "a" and "and" where they aren't needed.
• Avoid special characters. Spaces, accents, symbols and emoji get percent-encoded into ugly, unreadable strings.
• Skip dates and IDs unless they're genuinely useful — they date your content and add noise.

Good vs. bad: real examples

Bad: example.com/index.php?id=1042&cat=7
Better: example.com/blog/how-qr-codes-work

Bad: example.com/The_Ultimate_Guide_To_SEO_2026!!!
Better: example.com/seo-guide

The improved versions are shorter, all lowercase, hyphenated and free of junk characters — easy for both people and crawlers to parse.

Don't change slugs carelessly

Once a page is published and possibly linked to, changing its slug breaks those links and any ranking it has built. If you must change a URL, set up a 301 redirect from the old address to the new one so visitors and search engines are sent to the right place and the page keeps its authority.

Generate perfect slugs automatically

You don't have to format slugs by hand. Paste any title into our free slug generator and it strips accents and punctuation, lowercases the text and joins the words with hyphens — giving you a clean, SEO-ready URL every time.