URL Slugs: Write Web Addresses That Last with Free Online Tools

A slug is the final, path-level identifier for a single page. In a full URL such as https://siteb.biz/text-tools/url-slug-basics, the domain is siteb.biz, the folder path is /text-tools/, and the slug is url-slug-basics. It is not the page title, not the meta description, and not the headline that appears above the article. Some content management systems generate a slug automatically from the title, but the two fields serve different purposes: the title can change with a redesign or a seasonal campaign; the slug should not, because every external link points to it.

A headline is written to catch attention in a feed; a slug is written to survive for years in a link. That difference explains why you should strip marketing language, year numbers and product version strings from slugs. A title like '10 Best Free Online Tools for 2024' becomes a slug such as 10-best-free-online-tools-for-2024, which looks fine today and broken in January 2025. The same applies to promotional phrases: 'Limited-Time Offer' ages badly, while 'offer' stays neutral. Keep the noun, lose the adjective.

Accented characters are valid in URLs, but they create two problems. Browsers usually display ü as ü while the underlying address is percent-encoded as %C3%BC, which is ugly in plain text and fragile when copied between systems. For German, the convention is to transliterate ü to ue, ä to ae and ö to oe, but the shorter 'u' form is acceptable in many international contexts. French and Spanish accents are more often dropped: résumé becomes resume, not reesume. For non-Latin scripts—Cyrillic, Arabic, Chinese—percent-encoding is unavoidable unless you use a Latin transliteration layer, which introduces its own inconsistencies.

Stop words—the, a, an, of, and—can usually be removed from slugs without losing meaning. 'Guide to URL Slugs' becomes url-slugs-guide or guide-url-slugs; both are readable. Length matters because long slugs truncate in search results, social previews and email clients. Aim for roughly 40 to 60 characters in the slug itself, including hyphens. Dates are the most common regret: /blog/2024/url-slug-basics locks the content to one year and forces a redirect when the guide is updated in 2026. If the date is part of the archive structure, keep it in the folder path, never in the slug.

Changing a slug after a page is indexed is not a typo fix; it is a migration. You must return a 301 redirect from the old URL to the new one, update every internal link, and wait for search engines to re-process the signal. During that window, rankings can slip, referral traffic can drop, and any bookmarks or backlinks that miss the redirect become 404 errors. The work is straightforward on a small site and expensive on a large one: a redirect audit from an SEO consultant typically runs €400–€1,200 depending on site size, while a developer implementing the redirects may charge €150–€600 depending on the CMS and the number of rules.

Before you publish, imagine someone reading the URL in five years. Will the topic still be accurate? Will the year in the slug feel stale? Will the file still exist if the author leaves? A durable slug is descriptive, language-appropriate, and free of anything that ties it to a campaign or a quarter. It should be easy to type from memory and safe to paste into an email without breaking. The best slugs look obvious in retrospect and survive redesigns because they name the thing, not the moment.

Browser-based slug generators are useful for the first pass: paste a title, get a hyphenated string, copy it into your CMS. The five tools we publish on siteb.biz run entirely in your browser, so nothing leaves your machine, and the independent mini projects we list each sit on their own subdomain with their own privacy policies. Still, a slug generator cannot know your content strategy, your existing URL patterns or your redirect history. For a one-off blog post, a free online tool is enough. For a site migration, a rebrand or a multilingual setup, hire a developer or an SEO professional; the cost of getting it wrong is usually higher than the cost of the advice.

If a slug is genuinely wrong—misleading, offensive, or blocking a restructure—change it, but change it once. Map the old URL to the new one with a 301 redirect at the server level, not a plugin-only redirect that can be disabled by accident. Update every internal link, including navigation, footer links and image srcset references if they contain the URL. Submit the changed URL through your search console and monitor 404 logs for at least 30 days. Keep the redirect live indefinitely; removing it after a year is the most common way to recreate the original problem.