Utility

Text to URL Slug Converter

Turn any title or phrase into a clean, SEO-friendly URL slug

Separator
Generated slug
10-best-javascript-frameworks-in-2025

37 characters

What Is a URL Slug?

A URL slug is the human-readable segment at the end of a web address that identifies a specific page. In https://example.com/blog/best-javascript-frameworks, the slug is best-javascript-frameworks. A good slug is lowercase, uses hyphens as word separators, contains target keywords, and strips filler words and special characters.

Why URL Slugs Matter for SEO

Google uses the URL as one of many relevance signals. A slug containing your target keywords sends a contextual signal to crawlers before they even read the page content. It also appears in the search result URL line, which users read before clicking. A clear, descriptive slug improves click-through rate.

  • Good slug: /tools/mortgage-calculator
  • Bad slug: /page?id=2847&ref=nav

Hyphens vs. Underscores

Always use hyphens. Google confirmed as far back as 2009 that hyphens act as word separators, while underscores do not. The URL /javascript-tips ranks for "javascript" + "tips" separately; /javascript_tips is treated as a single token "javascript_tips". This is one of the most misunderstood URL best practices.

Best Practices for URL Slugs

  • Use lowercase only — /Best-Practices and /best-practices can be treated as different pages, causing duplicate content issues.
  • Keep it short — 3–5 words is ideal. Strip "the", "a", "and", "of" and other stop words from long titles.
  • Include the primary keyword — but don't stuff multiple variants. One target keyword per slug.
  • No special characters — ampersands, quotes, percent signs, and spaces must be percent-encoded in URLs. Avoid them entirely in slugs.
  • No dates unless essential — /2024/01/15/article dates your content and requires redirects when you update it.
  • Be permanent — once published and indexed, changing a slug breaks inbound links and ranking. Redirect if you must change one.

Frequently Asked Questions

What is a URL slug?
A URL slug is the part of a URL that identifies a specific page in a human-readable, SEO-friendly way. For a blog post titled "10 Best JavaScript Frameworks in 2025", the slug would typically be "10-best-javascript-frameworks-in-2025". Slugs use lowercase letters, numbers, and hyphens — no spaces, special characters, or uppercase letters.
Why do URL slugs matter for SEO?
Search engines use the URL as a relevance signal. A clean slug with keywords ("best-running-shoes") is better than a generic ID ("product?id=4521"). Descriptive slugs also appear in search result snippets, improving click-through rates. Google recommends using hyphens as word separators (not underscores) and keeping URLs short and relevant to the page content.
Should I use hyphens or underscores in URL slugs?
Use hyphens. Google's own guidance (and John Mueller's public statements) confirm that hyphens are treated as word separators, while underscores join words together. "running-shoes" is seen as two separate words; "running_shoes" is treated as one compound word. This matters for keyword matching in search rankings. Hyphens are the universal industry standard for URL slugs.
Should URL slugs include stop words?
For very long titles, removing common stop words (a, the, and, of, etc.) can shorten the slug without losing meaning. For example, "The Best Guide to Running Shoes" → "best-guide-running-shoes". However, if the stop word is part of a brand name or meaningful phrase, keep it. For shorter titles, leaving stop words in is fine and can make the URL more readable.
How long should a URL slug be?
Aim for 3–5 words in most cases. Shorter slugs are easier to share, remember, and read. Very long slugs dilute keyword relevance and look messy in search results. If your title is long, strip stop words and filler phrases to get to the core keywords. While there is no hard limit, Google recommends keeping URLs as short as possible while remaining descriptive.

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