Hyphen or underscore?

Hyphen. Search engines read a hyphen as a word break and an underscore as a joiner, so my-blog-post counts as three words and my_blog_post as one.

How long should a slug be?

Short enough to read whole in a search result. Under 60 characters is a sensible ceiling, and three to five meaningful words beat a full sentence.

Small words like the, of or and that carry little meaning on their own. Dropping them shortens a slug without losing its subject, although it can make a title read oddly.

What does transliterating do?

It rewrites letters outside a-z as their closest ASCII match: é becomes e, ß becomes ss, ñ becomes n. Accented URLs do work, but they get percent-encoded the moment they are copied.

Does my text leave the browser?

No. There is no server, no upload and no analytics. Open DevTools, watch the Network tab and type: not a single request goes out.

Slugify — free URL slug generator, runs in your browser

Turn any title into a clean URL slug. Free, no sign-up, and your text never leaves this page.

Your text

Try one:

Slug

One line, one slug

Number repeated slugs ( -2, -3 )

Slug

Paste a list of titles to see one slug per line.

Options

Separator

Lowercase Transliterate accents (é → e) Remove special characters Symbols to words (& → and) Remove numbers

Advanced options

Content language Picks the transliteration table, the symbol words and the stop word list.

Remove stop words

Maximum length 0 means no limit. Cuts at a word boundary.

Questions

Hyphen or underscore?: Hyphen. Search engines read a hyphen as a word break and an underscore as a joiner, so my-blog-post counts as three words and my_blog_post as one.
How long should a slug be?: Short enough to read whole in a search result. Under 60 characters is a sensible ceiling, and three to five meaningful words beat a full sentence.
What are stop words?: Small words like the, of or and that carry little meaning on their own. Dropping them shortens a slug without losing its subject, although it can make a title read oddly.
What does transliterating do?: It rewrites letters outside a–z as their closest ASCII match: é becomes e, ß becomes ss, ñ becomes n. Accented URLs do work, but they get percent-encoded the moment they are copied.
Does my text leave the browser?: No. There is no server, no upload and no analytics. Open DevTools → Network and type: not a single request goes out.
Can I upload a file?: No, on purpose. Typing and pasting are the only ways in, which keeps the whole tool to one small, auditable surface.