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URL SlugRegex — Pattern, Examples & Code

^[a-z0-9]+(?:-[a-z0-9]+)*$

What it matches / doesn't match

Matches ✅Does not match ❌
●hello-world●-leading-hyphen
●my-blog-post-2024●trailing-hyphen-
●api-v2●double--hyphen

How it works

Matches URL-safe slugs consisting of lowercase letters and digits, with single hyphens as word separators. Leading hyphens, trailing hyphens, and consecutive hyphens are all rejected. This pattern does not allow uppercase letters or underscores — normalize the input string first if needed.

Code Usage

JavaScript

const regex = /^[a-z0-9]+(?:-[a-z0-9]+)*$/;
regex.test("hello-world"); // true

Python

import re
pattern = re.compile(r'^[a-z0-9]+(?:-[a-z0-9]+)*$')
bool(pattern.match("hello-world"))  # True

Go

import "regexp"
r := regexp.MustCompile(`^[a-z0-9]+(?:-[a-z0-9]+)*$`)
r.MatchString("hello-world") // true

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FAQ

What does the URL Slug regex pattern match?

Matches URL-safe slugs consisting of lowercase letters and digits, with single hyphens as word separators. Leading hyphens, trailing hyphens, and consecutive hyphens are all rejected. This pattern does not allow uppercase letters or underscores — normalize the input string first if needed.

How do I use the URL Slug regex in JavaScript?

const regex = /^[a-z0-9]+(?:-[a-z0-9]+)*$/; regex.test("hello-world"); // true

Can I use the URL Slug regex in Python?

Yes. import re pattern = re.compile(r'^[a-z0-9]+(?:-[a-z0-9]+)*$') bool(pattern.match("hello-world")) # True