Are slugs better for SEO?

For page identity, yes — descriptive slugs are readable and keyword-relevant. Query parameters are fine for state but can spawn duplicate URLs if not managed.

How do I make a good slug?

Lowercase it, replace spaces with hyphens, strip punctuation, and keep it short and descriptive. A slugify tool automates this.

Do query parameters hurt rankings?

Not inherently, but uncontrolled parameters can create duplicate content. Use canonical tags and parameter rules to keep things clean.

URL Slug vs Query Parameter

Slugs and query parameters are two ways to put information into a URL. A slug is a readable path segment like /blog/email-deliverability. A query parameter is a key-value pair after a question mark like ?id=42&sort=asc. They suit different jobs.

The distinction matters for SEO and usability. Slugs describe stable, unique content and read cleanly; query parameters carry variable state like filters, sorting, or tracking. Using the wrong one creates duplicate-content headaches or ugly, unshareable URLs.

At a glance

Aspect	URL Slug	Query Parameter
Form	Path segment: /guides/spf-setup	Key-value: ?ref=x&page=2
Readability	High — human-friendly words	Lower — machine-oriented
SEO	Strong — descriptive, keyword-rich	Weaker — can create duplicates
Best for	Stable, unique pages	Filters, sorting, tracking, state
Caching	Clean, cacheable	Can fragment caching

When to use URL Slug

You're naming a stable, unique page like an article or product.
You want a descriptive, shareable, SEO-friendly URL.
The content doesn't change based on parameters.

When to use Query Parameter

You're passing variable state like filters or pagination.
You're adding tracking like UTM parameters.
The value shouldn't create a separate canonical page.

Verdict

Use slugs for the identity of a page and query parameters for its variable state. A blog post gets a keyword-rich slug; its sorting and tracking ride in query parameters. Beware parameter-driven duplicate content — set canonical tags and configure parameter handling so filtered views don't fragment your SEO. Generate slugs from titles and parse parameters when you need to read them.

Frequently asked questions

Related free tools

Slugify

Convert any text or title into a clean, URL-friendly slug instantly.

Open Tool

Query Parameter Extractor

Extract decoded key/value query parameters from a list of URLs into a table.

Open Tool

URL Cleaner

Normalise URLs by stripping fragments, trailing slashes and default ports.

Open Tool