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Slugify for Developers
Turn any text into a safe slug, filename, anchor or branch name.
Quick Tool Overview
Slugify for Developers transliterates rather than deletes — café becomes cafe, ß becomes ss, R&D becomes r-and-d — and gives the variants you end up needing anyway: a filename, an anchor, a branch name and a constant.
- What it does
- Turns text into a safe slug and its variants
- You give it
- A title, or a list with one per line
- You get back
- URL, filename, anchor, branch and constant
- Best for
- URLs, filenames and heading anchors
About the Slugify for Developers
Text in, a safe slug out — plus the variants you actually end up needing: an underscore version for a filename, a heading anchor, a branch name and a constant name, all from the same input.
The transliteration is what separates a usable slug from a mangled one. Accented letters are decomposed and their marks removed, so <code>café</code> becomes <code>cafe</code> rather than <code>caf</code>. Letters that have no decomposition get an explicit mapping — <code>ß</code> to <code>ss</code>, <code>ø</code> to <code>o</code>, <code>æ</code> to <code>ae</code> — because dropping them silently changes the word. And symbols are spelled out with spaces around them, so <code>R&D</code> gives <code>r-and-d</code> rather than <code>randd</code>.
Key features of the Slugify for Developers
Accents transliterated
Decomposed and stripped of their marks, so é becomes e rather than disappearing and leaving caf.
The letters that do not decompose
ß, ø, æ, đ, ł and þ each have an explicit mapping, because dropping them silently changes the word.
Symbols spelled out
With spaces around them, so R&D gives r-and-d and 100% gives 100-percent — not randd and 100.
Cut at a word boundary
A length limit trims to the last separator, so a capped slug never ends mid-word.
Five variants at once
The same input as a URL slug, a filename, an anchor, a branch name and a constant.
How to use the Slugify for Developers
-
1
Paste your text
A title, a heading or a whole list with one per line.
-
2
Choose a separator
Hyphen for URLs, underscore for filenames, or none at all.
-
3
Set a maximum length
The slug is cut at a word boundary rather than mid-word.
-
4
Take the variant you need
URL, filename, anchor, branch name or constant.
Frequently asked questions
Hyphens. Search engines treat a hyphen as a word separator and an underscore as a word joiner, so my_blog_post reads as one token and my-blog-post reads as three words.
Long enough to say what the page is and no longer — three to six words is typical. Cutting at a word boundary matters more than the exact limit; a slug ending mid-word looks broken.
They are transliterated, not dropped: é becomes e, ü becomes u, ß becomes ss. Letters with no standard decomposition have an explicit mapping, because silently deleting them changes the word.
Only with a 301 redirect from the old one. A slug is part of the URL, so changing it breaks every existing link and any ranking that URL has accumulated.
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