Slug Validator
Paste a URL slug to check whether it is valid — complete with the reason if it is invalid and a component breakdown if it is valid. Everything is processed on your device.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
My Blog Post
Example Output
✗ INVALID — has uppercase & spaces
How to Use
- 1Paste the a URL slug you want to check into the input box.
- 2If the tool offers extra options (e.g. dialect, flags, or variant), set them as needed.
- 3Click Validate (or press Ctrl+Enter).
- 4Read the result badge — VALID, INVALID, or VALID with a warning — along with the details and the list of issues, if any.
About Slug Validator
Slug Validator checks whether a string is a clean URL slug: lowercase letters, digits, and hyphens only; no spaces, no leading/trailing hyphen, and no double hyphens. A good slug makes URLs readable and SEO-friendly.
The tool lists each rule violation so you know exactly what to fix before using the slug in a permalink.
FAQ
Is my data sent to a server?
No. All validation runs in your browser with JavaScript. Nothing is uploaded, logged, or stored on our servers — safe for sensitive data.
How is this validator different from a parser or formatter?
A validator answers one question: is this input correct/valid? It returns a valid/invalid badge with the reason. A parser breaks input into its components, and a formatter tidies its layout. Use a validator when you just need to confirm something is sound before using it.