The URL slug is the part of a URL after the domain — example.com/this-is-the-slug/. Done well, slugs are shareable, SEO-friendly, and human-readable. Done badly (?p=12345&s=abc), they’re invisible to search engines and confusing to users. Every CMS auto-generates a slug from the post title, but the auto-generated version is often wrong: too long, retains stop words, includes special characters that need URL-encoding.
Our URL slug generator takes any title and produces a clean slug — lowercase, hyphen-separated, transliterated for non-ASCII characters, with optional length cap. Built for content workflows where you publish multiple times a week and want consistent slugs. This guide explains what makes a good slug, the SEO implications of slug choices, and the gotchas with Unicode languages.
What makes a good URL slug
- Lowercase only. URLs are case-sensitive on most servers; mixed-case slugs cause 404s when shared with wrong casing.
- Hyphens, not underscores. Google treats hyphens as word separators. Underscores are treated as word joiners (
my_great_postreads as one token to crawlers). - Short — 50-60 characters maximum. Google truncates URLs in SERP after ~75 chars; long slugs look spammy and don’t fit in mobile snippets.
- Stop words removed. “The”, “a”, “an”, “of”, “is” rarely add meaning to a slug.
how-to-cook-pastabeatshow-to-cook-the-best-pasta-of-your-life. - Keyword-front-loaded. Put the primary keyword first.
nyc-best-pizzareads better thanguide-to-the-best-pizza-in-nyc. - No punctuation, no spaces, no Unicode. Apostrophes, exclamation marks, accents, emojis — strip them all. They survive in modern browsers but break older ones, email links, and pasted URLs.
How URL slugs affect SEO
Slugs are a relatively minor ranking factor — Google has said as much in public communications — but they affect three signals that compound over time:
- Click-through rate. Users see slugs in search results.
example.com/best-running-shoes-2026reads more relevant thanexample.com/post?id=12345. Clearer slugs win clicks. - Backlink anchor text. When other sites link to you, many use the URL itself as the anchor. A keyword-rich slug becomes free anchor text.
- Social share previews. Twitter, Slack, and LinkedIn show URLs prominently. Clean slugs look more professional in shares.
How to use the browser slug generator
- Open the URL slug generator
- Paste your post title or any text into the input
- The slug appears live as you type
- Toggle “Strip stop words” (the/a/an/of/etc. removed)
- Set max length (50-60 is the SEO sweet spot)
- Toggle “Transliterate Unicode” — converts
cafétocafe,北京tobei-jing, etc. - Click Copy
Slug generation in code
// JavaScript (slug-friendly approach)
function slugify(text) {
return text
.toLowerCase()
.normalize("NFKD") // decompose accents
.replace(/[̀-ͯ]/g, "") // remove diacritics
.replace(/[^a-z0-9\s-]/g, "") // strip punctuation
.trim()
.replace(/\s+/g, "-") // spaces to hyphens
.replace(/-+/g, "-") // collapse multiple hyphens
.slice(0, 60); // length cap
}
slugify("Café Owners Guide!"); // "cafe-owners-guide"
// Python (python-slugify package)
from slugify import slugify
slugify("Café Owners Guide!") # "cafe-owners-guide"
// Node (slugify package — handles 50+ languages)
import slugify from "slugify";
slugify("北京", { lower: true }); // "bei-jing"
// PHP (WordPress's built-in)
$slug = sanitize_title("Café Owners Guide!");
Common slug mistakes
- Including dates.
/2024/05/best-tools/looks dated by the next year. Either embrace it (news sites do) or omit dates and use evergreen slugs. - Including IDs.
/post-12345-best-tools/is the worst of both worlds — adds noise without semantic value. - Changing slugs after publishing. Existing inbound links break unless you set up 301 redirects. Pick the slug carefully on first publish.
- Stuffing keywords.
/best-cheap-affordable-budget-running-shoes/reads as keyword-stuffed and Google may penalise. - Forgetting trailing slashes. Pick
/posts/foo/or/posts/fooas your canonical form and stick to it. Inconsistent trailing slashes confuse crawlers and cause duplicate-content issues.
Frequently asked questions
Should I include the year in my URL slug?
Only if the content is genuinely time-bound (news, annual rankings, year-specific reviews). For evergreen content (how-to guides, tutorials), omit dates so the slug remains relevant. If you do include a year, plan to update or redirect the URL when the year changes.
How long should a URL slug be?
50-60 characters is the SEO sweet spot. Long enough to include keywords; short enough to display in mobile search snippets without truncation. 75+ characters get truncated in Google SERP.
Should I remove stop words from my slug?
Generally yes — they add length without adding meaning. how-to-cook-pasta beats how-to-cook-the-best-pasta-of-your-life. Exception: when removing the stop word changes meaning (rare). The tool’s “Strip stop words” toggle lets you choose per-slug.
What if my title contains non-English characters?
Three options: (1) transliterate to ASCII (café → cafe) — safest for global audiences; (2) keep Unicode in the URL with proper encoding (modern browsers handle this fine, but tools, CRMs, and email clients sometimes don’t); (3) use a localised slug system per language. The tool defaults to transliteration for ASCII safety.
Can I change a slug after publishing?
Yes, but you must set up a 301 redirect from the old URL to the new one to preserve incoming links and SEO value. Without redirects, all existing backlinks break and the page loses its accumulated ranking signal. WordPress and most CMSes have plugins to manage redirects automatically when slugs change.
Is the slug data sent anywhere?
No. The slug is generated in your browser using JavaScript string manipulation. The text you paste, the generated slug, and any settings stay on your device.
Related tools and guides
- URL Slug Generator
- URL Encoder/Decoder
- Case Converter
- Multiple Whitespace Remover
- Letter Counter
- All coding tools
![URL Slug Generator: SEO-Friendly URLs in Seconds [2026]](https://simpletool.io/blog/wp-content/uploads/2026/05/url-slug-generator.png)