How to Create a Slug for SEO-Friendly URLs
A URL slug is the part of a web address that identifies a specific page.
For example, in this URL:
https://example.com/blog/how-to-create-better-buttons/
The slug is:
how-to-create-better-buttons
A good slug is short, readable and descriptive. It helps users understand what the page is about before they click, and it gives search engines a cleaner URL structure to crawl and interpret.
In this guide, you will learn what a URL slug is, how to create SEO-friendly slugs, what mistakes to avoid and how to generate clean slugs online with the free Slug Generator by Free Utilities Online.
What Is a URL Slug?
A URL slug is the readable part of a URL that usually comes after the domain name and folder path.
Example:
https://example.com/tools/color-contrast-checker/
The slug is:
color-contrast-checker
The slug usually describes the page content.
Good slugs help make URLs easier to read, share and manage.
What Makes a Slug SEO-Friendly?
An SEO-friendly URL slug is:
short;
readable;
descriptive;
lowercase;
separated with hyphens;
focused on the main topic;
free from unnecessary words;
easy to understand;
stable over time.
Example of a good slug:
css-border-radius-generator
Example of a weak slug:
page-id-482-new-final-version
The first one tells users and search engines what the page is about. The second one does not.
Why URL Slugs Matter
A URL slug is not the most important SEO factor, but it still matters for clarity and user experience.
A clean slug can help:
make links easier to read;
make pages easier to share;
improve content organization;
support clearer site structure;
make analytics reports easier to understand;
reduce messy URLs;
make the page topic more obvious.
For example, this URL is easy to understand:
https://example.com/blog/css-grid-vs-flexbox/
This one is not:
https://example.com/blog/post.php?id=7832&ref=homepage
A readable URL creates more trust.
Use Lowercase Letters
A good slug should use lowercase letters.
Better:
image-compressor
Avoid:
Image-Compressor
Or:
IMAGE-COMPRESSOR
Lowercase slugs are easier to read and more consistent.
They also help avoid confusion on systems where URL paths may be case-sensitive.
Use Hyphens Between Words
Use hyphens to separate words in a slug.
Good:
how-to-resize-an-image
Avoid using underscores:
how_to_resize_an_image
Avoid removing spaces without separators:
howtoresizeanimage
Hyphens make the slug easier to scan.
A user can quickly read:
color-palette-generator
But this is harder:
colorpalettegenerator
Keep the Slug Short
A slug should be long enough to describe the page, but not longer than necessary.
Good:
compress-images-without-losing-quality
Too long:
how-to-compress-your-images-online-without-losing-too-much-quality-for-your-website
Long slugs can be harder to read, harder to share and less elegant.
A practical rule:
Use the fewest words needed to describe the page clearly.
Include the Main Keyword
If the page has a main keyword, include it naturally in the slug.
For example, if the page is about a CSS button generator:
css-button-generator
If the page is about resizing an image for Instagram:
resize-image-for-instagram
If the page is about creating QR codes:
create-qr-code-for-website
Do not force keywords unnaturally. The slug should still read like a normal phrase.
Remove Unnecessary Words
Some words can be removed if they do not add meaning.
For example, this title:
How to Create a QR Code for a Website
Can become:
create-qr-code-for-website
This title:
The Best Way to Resize an Image for Instagram
Can become:
resize-image-for-instagram
You do not always need words like:
the;
a;
an;
and;
of;
to;
in;
for.
However, do not remove so many words that the slug becomes unnatural or unclear.
Avoid Dates Unless They Matter
Dates can make a slug feel outdated.
Avoid:
best-css-tools-2026
Unless the page is specifically about that year.
Better for evergreen content:
best-css-tools
Use dates when the page is time-specific:
black-friday-deals-2026
Or:
instagram-image-sizes-2026
If the content is meant to stay useful over time, avoid locking the slug to a year.
Avoid Special Characters
A clean slug should avoid special characters.
Avoid:
what-is-css?!-complete-guide
Better:
what-is-css
Avoid characters like:
? ! & % # @ + =
Some characters have special meaning in URLs and may need to be encoded.
A slug generator can help clean these characters automatically.
Avoid Spaces in URLs
Spaces are not ideal in slugs.
Bad:
how to create a slug
Better:
how-to-create-a-slug
When URLs contain spaces or special characters, browsers and systems may encode them.
A space may appear as something like:
%20
That makes the URL less readable.
A clean slug avoids this problem by using hyphens instead.
Remove Accents and Diacritics
For international content, it is usually safer to remove accents and diacritics from slugs.
For example:
diseño-web
Can become:
diseno-web
And:
cómo-crear-una-url
Can become:
como-crear-una-url
This helps keep URLs simple, portable and easier to type.
Your page title can still use accents. The slug can be simplified.
Avoid Stopword Removal That Breaks Meaning
Removing small words can make a slug shorter, but be careful.
For example:
public-ip-vs-private-ip
This is clear.
If you remove too much:
public-private-ip
It may still be understandable, but it is less precise.
Another example:
resize-image-for-instagram
If shortened too much:
resize-image-instagram
It is still okay, but slightly less natural.
A good slug balances brevity and clarity.
Match the Slug to the Page Intent
Your slug should match what the page actually does.
For example, if the page is a tool:
word-counter
If the page is a tutorial:
how-to-count-words-online
If the page is a comparison:
jpg-vs-png-vs-webp
If the page is a definition:
what-is-a-url-slug
This helps users understand the format of the page before opening it.
Use a Consistent Slug Style
Choose one slug style and use it across your website.
For example:
lowercase-words-with-hyphens
Use that style everywhere.
Avoid mixing:
css_button_generator
CSS-Button-Generator
cssButtonGenerator
css-button-generator
Consistency helps your URLs feel cleaner and more professional.
It also makes internal linking, redirects and content management easier.
Slug Examples for Different Page Types
Tool Page
Title:
CSS Gradient Generator
Slug:
css-gradient-generator
Blog Post
Title:
How to Create a CSS Gradient Background
Slug:
create-css-gradient-background
Comparison Article
Title:
JPG vs PNG vs WebP: Which Image Format Should You Use?
Slug:
jpg-vs-png-vs-webp
Tutorial
Title:
How to Resize an Image for YouTube Thumbnail
Slug:
resize-image-for-youtube-thumbnail
Guide
Title:
CSS Variables Explained for Beginners
Slug:
css-variables-explained
Title vs Slug: What Is the Difference?
The page title is the full human-readable title.
Example:
How to Create a Slug for SEO-Friendly URLs
The slug is the shorter URL-friendly version.
Example:
create-slug-seo-friendly-urls
The title can be longer, more natural and more persuasive.
The slug should be shorter, cleaner and easier to use in a URL.
Should Slugs Include Category Names?
Sometimes a URL includes a category before the slug.
Example:
https://example.com/blog/css/create-css-buttons/
Here:
blog/css/
Is the path.
And:
create-css-buttons
Is the slug.
Categories can help organize content, but they can also make URLs longer.
Both options can work:
https://example.com/blog/create-css-buttons/
https://example.com/blog/css/create-css-buttons/
The best choice depends on your site structure.
The most important thing is to keep the URL clean, logical and stable.
Should You Change Old Slugs?
Be careful when changing old slugs.
If a page is already published, indexed or receiving traffic, changing the slug changes the URL.
That can break:
internal links;
external links;
bookmarks;
social shares;
analytics history;
search results;
backlinks.
If you change a slug, you should usually create a redirect from the old URL to the new URL.
Example:
Old URL → New URL
Use slug changes carefully.
For new content, create the best slug before publishing.
When Should You Change a Slug?
Changing a slug may make sense when:
the old slug is unclear;
the slug has a typo;
the URL contains random numbers;
the page topic changed significantly;
the old URL is too messy;
the page is not indexed yet;
you are restructuring content carefully.
Avoid changing slugs just to make tiny improvements.
If a URL already performs well, stability may be more valuable than perfection.
Common Slug Mistakes
1. Using Underscores
Avoid:
seo_friendly_url_slug
Better:
seo-friendly-url-slug
Hyphens are easier to read in URLs.
2. Keeping the Full Title
A title like this:
How to Create a Slug for SEO-Friendly URLs: Complete Beginner Guide
Does not need a slug like this:
how-to-create-a-slug-for-seo-friendly-urls-complete-beginner-guide
Better:
create-slug-seo-friendly-urls
3. Using Random Numbers
Avoid:
post-582
Better:
public-ip-vs-private-ip
Random numbers do not describe the content.
4. Keyword Stuffing
Avoid:
seo-slug-generator-seo-friendly-slug-create-seo-url-slug
Better:
seo-friendly-url-slug
Use the main keyword naturally. Do not repeat it.
5. Using Special Characters
Avoid:
best-tools-for-designers-&-developers!
Better:
best-tools-for-designers-developers
Clean URLs are easier to read and share.
6. Making the Slug Too Generic
Avoid:
guide
Better:
css-variables-explained
The slug should describe the page topic.
How to Create a Slug Manually
You can create a slug manually with this process:
Start with the page title.
Convert it to lowercase.
Remove punctuation.
Remove accents if needed.
Replace spaces with hyphens.
Remove unnecessary words.
Keep the main keyword.
Check that it is readable.
Avoid changing it after publishing.
Example title:
How to Resize an Image for Instagram
Step-by-step:
how to resize an image for instagram
Remove unnecessary words if desired:
resize image for instagram
Add hyphens:
resize-image-for-instagram
Final slug:
resize-image-for-instagram
How to Generate a Slug Online
The easiest way to create a clean slug is to use a slug generator.
With the free Slug Generator by Free Utilities Online, you can:
paste a title;
convert it to lowercase;
remove special characters;
replace spaces with hyphens;
clean extra spaces;
remove unsupported characters;
create a URL-friendly slug;
copy the result instantly.
This is useful for:
blog posts;
WordPress pages;
landing pages;
product pages;
documentation;
tool pages;
category pages;
SEO content;
file names.
Instead of cleaning text manually, you can generate a slug in seconds.
Practical Slug Recipes
Blog Post Slug
Title:
How to Compress Images Without Losing Quality
Slug:
compress-images-without-losing-quality
Tool Page Slug
Title:
Color Contrast Checker
Slug:
color-contrast-checker
Comparison Slug
Title:
CSS Grid vs Flexbox: When Should You Use Each?
Slug:
css-grid-vs-flexbox
Tutorial Slug
Title:
How to Create a QR Code for a Website
Slug:
create-qr-code-for-website
Definition Slug
Title:
What Is My IP Address and Why Does It Matter?
Slug:
what-is-my-ip-address
Slugs for WordPress
In WordPress, the slug is usually created from the post or page title.
For example, a title like:
How to Create Better CSS Buttons
May automatically become:
how-to-create-better-css-buttons
Before publishing, it is worth checking the slug manually.
You may want to shorten it, remove unnecessary words or make the keyword clearer.
For example:
how-to-create-better-css-buttons
Could become:
create-better-css-buttons
Both are readable. The better option depends on your editorial style.
Slugs for Product Pages
Product page slugs should be clean and descriptive.
Good:
wireless-keyboard
More specific:
wireless-mechanical-keyboard
Avoid:
product-3948-final
If the product has a model number, include it only if users search for it or need it to identify the product.
Slugs for Tool Pages
Tool page slugs should usually match the tool name.
Examples:
word-counter
image-compressor
css-gradient-generator
utm-link-builder
This makes tool URLs predictable and easy to remember.
Slugs for Categories
Category slugs should be broad and simple.
Examples:
text-utilities
image-tools
network-tools
design-utilities
Avoid changing category slugs often because they can affect many URLs at once.
Related Free Text Tools
You may also find these tools useful:
Together, these tools help you clean, format and prepare text for URLs, titles, content editing and web publishing.
FAQ
What is a URL slug?
A URL slug is the readable part of a URL that identifies a specific page. For example, in /blog/create-css-buttons/, the slug is create-css-buttons.
What makes a slug SEO-friendly?
An SEO-friendly slug is short, readable, descriptive, lowercase and separated with hyphens. It should include the main topic or keyword naturally.
Should I use hyphens or underscores in URLs?
Use hyphens. Hyphens make words easier to separate and read in URLs. Avoid underscores for normal SEO-friendly slugs.
Should I change old URL slugs?
Be careful. Changing an old slug changes the URL and can break links. If you change a published slug, use a proper redirect from the old URL to the new one.
Can I generate a slug online?
Yes. You can use a slug generator to convert a title into a clean URL-friendly slug automatically.
Final Tip
A good slug is simple, readable and stable.
Use lowercase words, separate them with hyphens, include the main topic and avoid unnecessary words or special characters.
Try the Slug Generator to turn titles into clean SEO-friendly URL slugs instantly.