Web

URL Slug

Validate URL slugs: lowercase letters and digits separated by single hyphens, no leading/trailing hyphens.

Try it in RegexPro →

Available in

JSSupported

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

PYSupported

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

GOSupported

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

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

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

How it works

Anchored with ^ and $. Requires at least one alphanumeric character. Hyphens can only appear between alphanumeric groups — not at start or end.

Examples

Input

my-blog-post

Matches

  • my-blog-post

Input

hello-world-123

Matches

  • hello-world-123

Input

-bad-slug-

No match

—

Common use cases

  • •CMS URL slug validation
  • •SEO-friendly URL generation
  • •Blog post/product permalink checks
  • •Route parameter sanitisation

Related patterns

Slug (Unicode Letters Allowed)

Web

Validate URL slugs allowing Unicode letters (`café-rénové`), as supported by Next.js i18n routing.

HTML5 Color Input Value

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Validate the value of an HTML5 `<input type="color">` — exactly 6 hex digits with leading hash.

URL Path Segment

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Match individual `/segment` parts of a URL path, capturing each one.

URL Query String

Web

Extract the query string portion of a URL (everything between `?` and `#` or end-of-string).

Related concepts

Anchors: ^ and $ Explained

Concept

Anchors match positions, not characters. ^ asserts the start of the string (or line, with the m flag) and $ asserts the end.

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