Knowledge Hub
Everything you need to master SEO. In-depth guides, how-to articles, and free tools covering Technical SEO, On-Page optimization, Off-Page signals, and AI visibility.
SEO Guides
Comprehensive, in-depth guides covering the fundamentals and advanced techniques of SEO.
Canonical URLs: The Complete SEO Guide
Master canonical tags, fix duplicate content, and consolidate link equity.
Robots.txt for SEO: The Complete Guide
Best practices, common mistakes, and managing AI bots with robots.txt.
XML Sitemap Best Practices
Create, optimize, and maintain XML sitemaps for maximum search visibility.
URL Structure Optimization Guide
Clean, SEO-friendly URLs that improve rankings, UX, and click-through rates.
Blog Articles
How-to articles, fix guides, and deep-dive analyses organized by category.
Robots.txt Complete Guide 2026
18 min readHow to Fix Robots.txt Issues
18 min readHow to Fix Sitemap XML Issues
15 min readSitemap XML Best Practices
14 min readHow to Fix HTTP Status Issues
14 min readHow to Fix Canonical URL Issues
14 min readHow to Fix URL Structure Issues
12 min readHow to Fix Mixed Content Issues
12 min readHow to Fix X-Robots-Tag Issues
12 min readCore Web Vitals Guide
15 min readHow to Fix Page Speed Issues
14 min readAI Crawlers & Robots.txt
12 min readFree SEO Tools
20 standalone checkers you can use right now -- no signup required. Each tool runs a focused analysis on one aspect of your website's SEO.
Robots.txt Checker
Validate robots.txt syntax, directives, and AI bot rules
Sitemap Checker
Analyze XML sitemap for errors, broken URLs, and coverage
HTTP Status Checker
Check HTTP status codes, redirects, and server response
Canonical URL Checker
Detect canonical tag issues and duplicate content
URL Structure Checker
Audit URL format, length, keywords, and best practices
Mixed Content Checker
Find HTTP resources on HTTPS pages
X-Robots-Tag Checker
Inspect X-Robots-Tag HTTP headers
Page Speed Checker
Core Web Vitals and performance metrics
Backlinks Checker
Analyze backlink profile quality and authority
External Links Checker
Check external link health and anchor text
Outbound Links Checker
Review outbound link quality and relevance
Spam Score Checker
Detect spam signals and toxic link patterns
Social Media Checker
Verify social media presence and integration
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