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URL Slug Generator

Turns a list of titles into URL slugs, folding accents and flagging any two that would collide.

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Processing happens locally in your browser. What you paste or load is processed by this page and is not uploaded to a server. Nothing is stored unless you use a control that says it stores something, and you can clear anything this site has kept from the privacy page.

How to use this tool

  1. Paste one title per line.
  2. Choose the separator, and a maximum length if your routing has one.
  3. Select Make slugs.
  4. Read the summary before using the result. It tells you whether any two slugs collided, which would mean two pages competing for one URL.

What slug generator does

A slug is the readable part of a URL, and it has to survive being typed, copied into an email and pasted into a shell. That means lower case, no spaces, no punctuation and no accented letters — "Café Society: A Review" becomes cafe-society-a-review. Folding the accent rather than dropping the letter is the part naive slug code gets wrong, and it is the difference between cafe and caf.

The other half of the job is collisions. Two different titles regularly produce the same slug once punctuation and case are gone, and a duplicate slug means a broken route or an overwritten page. Paste your whole list at once and the summary tells you how many collided, so you can add a suffix before the URLs are published rather than afterwards.

Frequently asked questions

They are folded to their base letter, so Café becomes cafe and Ångström becomes angstrom. That is almost always what you want in a URL. Dropping the letter entirely, which simpler tools do, would give you caf.

Because two different titles frequently produce the same slug once case and punctuation are stripped — "Data Quality in Practice" and "Data quality: in practice" collide. A duplicate slug means a broken route or one page overwriting another, and it is much cheaper to find here than after publishing.

Hyphens, for a public URL. Search engines have long treated a hyphen as a word separator and an underscore as a joiner, so my-page reads as two words and my_page can read as one. Underscores are here for the cases where a system requires them.