Question 1

What is a URL slug and why is it important for SEO?

Accepted Answer

A URL slug is the portion of a URL that identifies a specific page or resource on a website in a human-readable and search engine-readable format. For example, in the URL 'https://example.com/blog/best-running-shoes-2024', the slug is 'best-running-shoes-2024'. URL slugs are critical for SEO because Google and other search engines use them as a relevance signal. A descriptive, keyword-rich slug helps search engines understand the topic of the page and can improve click-through rates in search results.

Question 2

What characters are allowed in a valid URL slug?

Accepted Answer

RFC 3986 (the Uniform Resource Identifier standard) specifies which characters are safe in URL paths. Valid URL slug characters are: lowercase letters a–z, digits 0–9, and hyphens (-). Underscores (_) are technically valid but Google's John Mueller has publicly recommended hyphens over underscores because Google treats hyphens as word separators but treats underscores as word joiners. Special characters like #, ?, &, spaces, accented letters, and non-ASCII characters must be percent-encoded or removed.

Question 3

Should I use hyphens or underscores in URL slugs?

Accepted Answer

Always prefer hyphens over underscores in URL slugs for SEO purposes. Google explicitly treats the hyphen (-) as a word delimiter, meaning 'running-shoes' is indexed as two separate words 'running' and 'shoes', making the page relevant for both individual words and the combined phrase. Underscores join words together, so 'running_shoes' is treated as the single compound word 'runningshoes', severely limiting keyword match coverage.

Question 4

How do I create a good SEO-optimized slug for a blog post?

Accepted Answer

Follow these seven rules for an SEO-optimized blog slug: (1) Include your primary target keyword naturally. (2) Keep it short — under 60 characters, ideally 3 to 5 meaningful words. (3) Use lowercase only — 'My-Page' and 'my-page' can be treated as separate URLs. (4) Replace spaces with hyphens. (5) Remove stop words (a, an, the, is, of, and) when they add no keyword value. (6) Avoid dates in slugs for evergreen content — they signal staleness. (7) Never change a slug after publishing without setting up a 301 redirect to preserve PageRank.

Question 5

Should URL slugs be in lowercase?

Accepted Answer

Yes, always use lowercase-only URL slugs. URLs are technically case-sensitive on most web servers (particularly Apache and Nginx on Linux). Uppercase letters in URLs can create duplicate content problems: 'example.com/Blog-Post' and 'example.com/blog-post' are treated as two distinct pages by the server and potentially by Google's indexer. Using exclusively lowercase eliminates this canonicalization risk.

Question 6

What is the maximum recommended length for a URL slug?

Accepted Answer

There is no absolute technical maximum, but SEO best practice recommends keeping URL slugs under 60 characters. Google typically truncates displayed URLs in search results at approximately 60–70 characters. Shorter slugs are also more readable when shared on social media, in emails, or printed in physical materials. The most effective slugs are typically 3 to 5 words containing the primary target keyword.

Question 7

Should I include the year in a blog post slug?

Accepted Answer

This depends on whether the content is time-sensitive or evergreen. For news articles, comparison reviews, or 'best of' annual roundups where freshness matters, including the year (e.g., '/best-laptops-2024') signals recency to both users and search engines. For evergreen how-to guides, educational explanations, or tutorial content where information remains valid long-term, omit the year from the slug to avoid the perception that older articles are outdated.

Question 8

Can I change a published URL slug without hurting SEO?

Accepted Answer

Yes, but only if you implement a permanent 301 redirect from the old URL to the new URL. A 301 redirect tells search engines and browsers that the page has permanently moved, transferring approximately 90–99% of the original PageRank equity and link authority to the new URL. Without a 301 redirect, changing a slug creates a broken link that returns a 404 Not Found error, immediately deleting all accumulated search engine authority and destroying existing backlinks.

Question 9

How do e-commerce platforms like Shopify and WooCommerce generate product slugs?

Accepted Answer

Shopify and WooCommerce both auto-generate URL slugs from the product title by converting it to lowercase, replacing spaces with hyphens, and stripping special characters. However, their automatic slugs often include filler words and can be suboptimal. Best practice for e-commerce is to manually customize product slugs to: (1) include the primary keyword, (2) optionally include the product category, and (3) keep it concise, e.g., '/sneakers/nike-air-max-270-mens' rather than '/products/nike-air-max-270-mens-running-shoe-all-sizes-black'.

Question 10

What is the difference between a URL slug, permalink, and handle?

Accepted Answer

These terms are used differently across CMS platforms but refer to the same core concept. A 'permalink' (used by WordPress) is the complete permanent URL of a page including the domain and path: 'https://myblog.com/blog/my-post'. A 'slug' specifically refers to the final human-readable segment of the URL path: 'my-post'. A 'handle' (used by Shopify) is Shopify's term for a slug — the URL-safe identifier for products, collections, and pages. All three concepts describe a URL-safe, human-readable page identifier.

Slug Generator

What is a URL Slug and Why Does It Matter for SEO?

How the Slug Generator Transforms Your Text

Lowercase Conversion

Accent & Diacritic Normalization

Special Character Removal

Space to Hyphen Conversion

Consecutive Hyphen Collapse

Leading & Trailing Hyphen Trim

7 SEO Best Practices for Writing URL Slugs

Frequently Asked Questions About URL Slugs

Frequently Asked Questions