Text to Slug: What Makes a Good URL Slug for SEO

Every blog post, product page, and article needs a clean URL — and that URL almost always comes from turning a title into a "slug": lowercase, hyphenated, free of special characters. Getting this right matters more than it seems, both for SEO and for avoiding broken links down the line.

What Is a URL Slug?

A slug is the part of a URL that identifies a specific page in readable form — for example, in seostacktools.com/how-to-check-dns-records, the slug is how-to-check-dns-records. A good slug is short, descriptive, lowercase, and uses hyphens rather than spaces or underscores.

How Text Becomes a Slug

Converting a title into a slug generally involves:

• Converting all letters to lowercase
• Replacing spaces with hyphens
• Removing special characters (apostrophes, punctuation, symbols)
• Collapsing multiple consecutive hyphens into one
• Trimming leading and trailing hyphens

For example, "What's the Best SEO Tool in 2026?" becomes whats-the-best-seo-tool-in-2026.

Why Slug Quality Matters for SEO

Search engines and users both benefit from a clean, descriptive URL. A slug like /how-to-check-dns-records tells both a search engine and a human what the page is about before they even click. A slug like /post?id=48291 tells them nothing. Descriptive slugs are also more likely to include relevant keywords naturally, which is a minor but real on-page SEO signal.

Slug Best Practices

• Keep it reasonably short — long slugs get truncated in search results and are harder to share
• Avoid stop words where possible ("a," "the," "of") to keep it tight, though this is a style choice, not a hard rule
• Never change an existing page's slug without setting up a 301 redirect from the old URL — otherwise you lose any existing search ranking and break external links
• Stick to lowercase letters, numbers, and hyphens only — avoid underscores, which some search engines treat differently than hyphens

How to Generate a Slug

1. Open the Text to Slug tool
2. Paste your title or phrase
3. Copy the generated, URL-ready slug

Handling Accented and Non-English Characters

Titles with accented characters (é, ñ, ü) or non-Latin scripts need special handling that a naive lowercase-and-hyphenate approach misses. A good slug generator transliterates accented Latin characters to their closest plain-ASCII equivalent rather than stripping them outright — so "Café Menú" becomes cafe-menu rather than caf-men (which loses meaning) or a URL full of percent-encoded characters (which looks broken to most users). For non-Latin scripts like Chinese, Arabic, or Cyrillic, most sites either transliterate to a romanized approximation or fall back to a numeric/ID-based slug, since a direct hyphenation approach doesn't apply the same way.

Stop Words: Keep or Remove?

Common words like "a," "the," "of," and "for" are often stripped from slugs to keep them short, and Google has confirmed it doesn't need these words present to understand a URL's topic. That said, removing every stop word can occasionally produce an awkward or ambiguous slug ("best-tools-2026" versus "best-of-the-tools-for-2026") — readability for an actual human glancing at the URL still matters, even though it's not a ranking requirement. A reasonable approach is to remove stop words by default for brevity, but keep one in occasionally if the slug reads noticeably better or avoids genuine ambiguity with it included.

Slug vs Permalink vs Path: Terminology

These terms get used loosely and interchangeably, but technically:

• Slug — just the page-identifying segment itself, e.g. how-to-check-dns-records.
• Path — the full route after the domain, e.g. /blog/how-to-check-dns-records, which may include the slug plus category or section prefixes.
• Permalink — the complete, permanent URL including domain, e.g. https://example.com/blog/how-to-check-dns-records. "Permanent" is the operative idea — a permalink is meant to stay stable indefinitely once published.

Frequently Asked Questions

Should I use hyphens or underscores in a slug?

Hyphens. Google has historically treated hyphens as word separators but underscores as joining characters (so "seo_tools" may be read as one word "seotools" rather than two), making hyphens the safer, standard choice.

What happens if I change a page's slug after it's already indexed?

The old URL will 404 unless you set up a 301 redirect to the new URL. Without a redirect, you lose accumulated search ranking on that URL and break any existing external links or bookmarks.

Should slugs include numbers or dates?

It depends on the content — for evergreen content, avoid dates in the slug since they can make content look outdated even after updates. For genuinely time-specific content, a date can be appropriate.

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• The Complete Guide to Free Online Tools (all tool guides)

Try it yourself: Use our free Text to Slug →