Slug Generator

URL Slugs and Search Engine Optimization

Google has confirmed that words in URLs are a lightweight ranking signal. More practically, descriptive slugs dramatically improve click-through rates in search results: users see the URL preview below a search snippet and are more likely to click /blog/best-hiking-boots-2026 than /blog/post?id=4821. A clear, keyword-rich slug signals topical relevance before the page even loads.

In 2011, Google's Matt Cutts explicitly recommended hyphens over underscores for word separation in URLs, stating that Google treats hyphens as word separators but underscores as word joiners — meaning best-hiking-boots is indexed as three separate words while best_hiking_boots is treated as one compound token. This recommendation remains current Google guidance and is reflected in every major SEO framework. WordPress, Ghost, and Hugo all default to hyphen-separated slugs for this reason.

Keep slugs under 5 words and 60 characters. Longer slugs get truncated in search result URLs, and the extra words after the 5th contribute diminishing SEO value while adding visual noise. Never change a published slug without implementing a permanent 301 redirect — broken URLs accumulate over time and each one represents lost link equity.

Generating Slugs in Popular Frameworks

All three implementations perform Unicode transliteration — converting accented and non-Latin characters to their closest ASCII equivalents. This ensures slugs remain URL-safe across all character sets without percent-encoding.

# Python — using python-slugify (handles Unicode transliteration)
from slugify import slugify

slugify("Héllo Wörld! This is a Slug.")
# → "hello-world-this-is-a-slug"

slugify("Привет мир", allow_unicode=False)
# → "privet-mir"  (Cyrillic → Latin transliteration)

slugify("My Post Title", max_length=40, word_boundary=True)
# → "my-post-title"


# Ruby on Rails — String#parameterize (built-in ActiveSupport)
# "Héllo Wörld".parameterize          # => "hello-world"
# "Héllo Wörld".parameterize(separator: "_")  # => "hello_world"


# PHP — Laravel Str::slug
# use Illuminate\Support\Str;
# Str::slug("Héllo Wörld", "-")       // "hello-world"
# Str::slug("Über Straße", "-")       // "uber-strasse"

Slug Best Practices

• Use hyphens, not underscores: Google treats hyphens as word separators and underscores as word joiners, which affects how your URL keywords are indexed.
• Lowercase only: URLs are case-sensitive on most servers; mixing case creates duplicate URL issues and canonicalization problems.
• Remove stop words (the, and, of, a, in, to) to keep slugs concise without losing meaning — /best-hiking-boots beats /the-best-of-the-hiking-boots.
• Strip special characters, punctuation, and symbols entirely rather than encoding them — percent-encoded URLs (%26, %3F) are ugly and error-prone.
• Keep slugs under 60 characters — longer slugs are truncated in Google search result snippets and add no additional ranking benefit.
• Never change a published slug without a permanent 301 redirect — dead URLs lose all accumulated backlinks and indexing history.