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Url Slug Generator - Free Online Tool

Last updated March 22, 2026

What Is a URL Slug?

A URL slug is the human-readable part of a URL that identifies a specific page. A blog post titled "10 Best Practices for REST API Design" gets the slug 10-best-practices-for-rest-api-design. Good slugs are lowercase, hyphen-separated, keyword-rich, and free of special characters.

Basic Slug Generation

Input title: "Introduction to Machine Learning with Python"

Transformations applied:
  1. Lowercase:          introduction to machine learning with python
  2. Replace spaces:     introduction-to-machine-learning-with-python
  3. Remove special chars: (none to remove)
  4. Collapse hyphens:   (no consecutive hyphens)
  5. Trim hyphens:       (no leading/trailing hyphens)

Output slug: introduction-to-machine-learning-with-python

Handling Special Characters

Input: "C++ vs. Rust: Which Language Should You Choose in 2024?"

Step-by-step:
  Lowercase:     c++ vs. rust: which language should you choose in 2024?
  Transliterate: c++ vs. rust: which language should you choose in 2024?
  Remove special: c  vs  rust  which language should you choose in 2024
  Replace spaces: c--vs--rust--which-language-should-you-choose-in-2024
  Collapse hyphens: c-vs-rust-which-language-should-you-choose-in-2024

Output: c-vs-rust-which-language-should-you-choose-in-2024

Diacritic Transliteration

Accented characters are converted to their ASCII equivalents:

Input: "Café au Lait: Recette Française Authentique"

Transliteration:
  é → e
  è → e
  ç → c
  â → a
  ô → o
  û → u
  ñ → n
  ü → u
  ö → o
  ä → a

Output: cafe-au-lait-recette-francaise-authentique

More examples:
  "Über die Straße"     → uber-die-strasse
  "Año Nuevo"           → ano-nuevo
  "Ångström Unit"       → angstrom-unit
  "Søren Kierkegaard"   → soren-kierkegaard

Stop Word Removal (SEO Optimization)

Removing common stop words creates shorter, more keyword-dense slugs:

Input: "The Complete Guide to Building REST APIs with Node.js"

Without stop word removal:
  the-complete-guide-to-building-rest-apis-with-node-js
  (52 characters)

With stop word removal (removes: the, to, with):
  complete-guide-building-rest-apis-node-js
  (41 characters — shorter and more keyword-dense)

Common stop words removed:
  a, an, the, and, or, but, in, on, at, to, for,
  of, with, by, from, is, are, was, were, be, been

Maximum Length Control

Input: "A Comprehensive Deep Dive into the Architecture of Modern Distributed Database Systems and Their Performance Characteristics"

Full slug (too long):
  a-comprehensive-deep-dive-into-the-architecture-of-modern-distributed-database-systems-and-their-performance-characteristics
  (124 characters)

Truncated to 60 characters (at word boundary):
  comprehensive-deep-dive-architecture-modern-distributed
  (55 characters — truncated cleanly at word boundary)

Recommended max length: 60–70 characters for SEO

Hyphens vs Underscores

Input: "JavaScript Array Methods"

With hyphens (recommended):
  javascript-array-methods
  Google treats hyphens as word separators
  "javascript", "array", "methods" are separate keywords ✓

With underscores (not recommended for SEO):
  javascript_array_methods
  Google treats underscores as word joiners
  "javascript_array_methods" is treated as ONE keyword ✗

Verdict: Always use hyphens for SEO-friendly slugs.

Handling Numbers

Input: "15 JavaScript Tips for 2024"

Output: 15-javascript-tips-2024
  (numbers preserved — they carry meaning)

Input: "Top 10 Python Libraries for Data Science"

Output: top-10-python-libraries-data-science
  (with stop word removal: "for" removed)

Full URL Preview

Domain: https://myblog.com/posts/
Title:  "Getting Started with Docker and Kubernetes"

Generated slug: getting-started-docker-kubernetes

Full URL preview:
  https://myblog.com/posts/getting-started-docker-kubernetes

How it appears in search results:
  myblog.com › posts › getting-started-docker-kubernetes

Batch Slug Generation

Input titles:
  "How to Use Git Rebase"
  "Understanding Async/Await in JavaScript"
  "Docker Compose: A Practical Guide"
  "Building REST APIs with FastAPI"

Generated slugs:
  how-to-use-git-rebase
  understanding-async-await-javascript
  docker-compose-practical-guide
  building-rest-apis-fastapi

Slug Generation in Code

// JavaScript
function generateSlug(title) {
  return title
    .toLowerCase()
    .normalize('NFD')
    .replace(/[\u0300-\u036f]/g, '')  // remove diacritics
    .replace(/[^a-z0-9\s-]/g, '')     // remove special chars
    .trim()
    .replace(/\s+/g, '-')             // spaces to hyphens
    .replace(/-+/g, '-');             // collapse hyphens
}

generateSlug("Café au Lait: Recette Française");
// → "cafe-au-lait-recette-francaise"

// Python
import re
import unicodedata

def generate_slug(title):
    title = unicodedata.normalize('NFD', title.lower())
    title = ''.join(c for c in title if unicodedata.category(c) != 'Mn')
    title = re.sub(r'[^a-z0-9\s-]', '', title)
    title = re.sub(r'\s+', '-', title.strip())
    return re.sub(r'-+', '-', title)

SEO Best Practices for Slugs

Keep slugs under 60–70 characters
Use hyphens, not underscores
Include the primary keyword near the beginning
Avoid stop words (the, a, an, and, or, in, to)
Use only lowercase letters, numbers, and hyphens
Never change a published slug — it breaks existing links and SEO
Use 301 redirects if you must change a slug

URL Slug Generator Free Online Tool 2026

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