Chris ChoThe best free online courses to learn SEO in 2026 are Brainmunk's SEO Fundamentals course, Semrush Academy's SEO Fundamentals course, Ahrefs Academy's SEO course for beginners, and Moz's free SEO learning content.
Each one covers a different depth level, from foundation to professional-grade implementation.
Most people start with SEO by reading blog posts and trying things at random. These courses give you a structured path through technical SEO, keyword research, on-page optimization, and link building so your efforts actually compound over time.
Every course listed here is genuinely free to access. Some offer optional paid certificates, but the learning content costs nothing.
We offer this website completely free to our visitors. To help pay the bills, we’ll often (but not always) set up affiliate relationships with the top providers after selecting our favorites. However, we do our best not to let this impact our choices. There are plenty of high-paying companies we’ve turned down because we didn’t like their product.
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Quick Comparison
1. SEO Fundamentals – Brainmunk
Best for: Anyone who wants a structured SEO overview before investing time in longer tool-specific courses
The SEO Fundamentals course on Brainmunk covers 7 structured lessons: how search engines work, technical SEO and crawlability, keyword research and intent matching, on-page SEO, building authority through internal linking and link acquisition, SEO analytics, and competitive analysis and long-term strategy.
The course takes about 35 minutes to work through. No account required to start.
Once you have the foundation, you can generate spin-off courses on any SEO subtopic directly from Brainmunk. Need a dedicated course on technical SEO, local SEO, or SEO for ecommerce? Type it in and you have a new structured course in under 60 seconds.
The free plan covers your first three courses with every feature included. No credit card or trial period required.
Start the SEO Fundamentals Course Free
Pros
- 7 structured lessons covering the full SEO foundation
- Covers technical SEO, keywords, on-page, authority, and analytics
- Generate spin-off courses on any SEO subtopic to go deeper
- No account or credit card required to start
- Takes about 35 minutes to complete
Cons
- AI-generated, so verify specific technical recommendations against current Google guidelines
- Free plan limited to three courses total
2. SEO Fundamentals Course – Semrush Academy
Best for: Learning SEO with a free, industry-recognized certificate included
Semrush Academy offers a free SEO Fundamentals course that covers keyword research, on-page optimization, link building, and technical SEO. It's taught by seasoned SEO professionals and includes a free certificate upon completion that is recognized across the digital marketing industry.
The course uses Semrush's free tool tier for practice exercises, so you're learning SEO concepts while also getting hands-on with one of the most widely used SEO platforms. Semrush's free account gives you enough access to complete the exercises without paying.
The combination of free learning plus a free certificate makes Semrush Academy the strongest option here for anyone who wants a credential alongside their education.
Start the Free SEO Fundamentals Course on Semrush Academy
Pros
- Free course with a free industry-recognized certificate
- Taught by experienced SEO professionals
- Hands-on exercises using Semrush's free tool tier
- Covers keyword research, on-page, link building, and technical SEO
- Certificate is shareable on LinkedIn and recognized by employers
Cons
- Some exercises are Semrush-specific and less useful if you use other tools
- Requires a free Semrush account to complete practice exercises
- Less depth on technical SEO than Ahrefs' course
3. SEO Course for Beginners – Ahrefs Academy
Best for: A beginner-focused SEO course from one of the most trusted names in the industry
Ahrefs Academy offers a free SEO course for beginners delivered across 14 bite-sized video lessons in five modules. It covers how search engines work, keyword research, on-page optimization, link building, and technical SEO, all structured specifically for people with no prior SEO experience.
The course is concise and practical. Ahrefs built it to be tool-agnostic where possible, so the concepts apply regardless of which SEO tools you end up using. Where Ahrefs tools are referenced, the free account tier is sufficient.
Ahrefs is one of the two most widely used professional SEO platforms. Learning from their academy gives you a foundation built on how the industry's practitioners actually think about SEO.
Start the Free SEO Beginners Course on Ahrefs Academy
Pros
- 14 video lessons structured specifically for beginners
- Taught by Ahrefs, one of the most respected SEO platforms
- Largely tool-agnostic so concepts apply universally
- Free to access with no account required
- Strong on technical SEO compared to other beginner courses
Cons
- No certificate at completion
- Some advanced sections reference Ahrefs paid features
- Less hands-on practice than the Semrush Academy course
4. SEO Learning Center – Moz
Best for: Reference-quality SEO content and a free video library covering every core SEO topic
Moz's SEO Learning Center is one of the most comprehensive free SEO resources available. It covers every major SEO topic through a combination of written guides and Whiteboard Friday, Moz's long-running video series where SEO professionals explain concepts in a clear, whiteboard-style format.
It's not a structured course in the same way as Semrush or Ahrefs, but it's the best place to go for a clear explanation of any specific SEO concept. The Beginner's Guide to SEO is one of the most widely cited free resources in the industry and has been updated regularly since it was first published.
Use Moz alongside whichever structured course you choose. It's an excellent reference library for anything that doesn't click during the course.
Access the Free Moz SEO Learning Center
Pros
- Free, comprehensive reference for every major SEO topic
- Whiteboard Friday video library covers hundreds of specific SEO questions
- The Beginner's Guide to SEO is one of the best free SEO resources anywhere
- No account required to access most content
- Regularly updated to reflect algorithm changes and industry shifts
Cons
- Not a structured course, requires self-direction to build knowledge systematically
- Some advanced content requires a paid Moz Pro subscription
- The volume of content can make it hard to know where to start
Which Course Should You Start With?
Start with Brainmunk. The SEO Fundamentals course covers the full picture in about 35 minutes. You'll understand what SEO actually involves before spending hours in a tool-specific course.
From there, work through Semrush Academy's SEO Fundamentals course for a structured, credentialed learning path. The free certificate is worth having, and the hands-on exercises with Semrush's free tier accelerate what you retain.
Run through Ahrefs Academy's beginner course alongside or after Semrush. The two courses complement each other well, with Ahrefs being stronger on technical SEO concepts and Semrush being stronger on practical tool-based exercises.
Keep Moz's SEO Learning Center bookmarked throughout. Whenever a concept doesn't fully click in the structured courses, Moz's written guides and Whiteboard Friday videos almost always have a clear explanation.
For more tools to help you learn skills online, see our best free tools to learn anything online guide and the best free AI course generators.
Frequently Asked Questions
What is the best free course to learn SEO online?
Brainmunk's SEO Fundamentals course is the best starting point for a quick structured overview. For a more in-depth free course with a certificate, Semrush Academy's SEO Fundamentals course is the strongest option. Both are free and require no payment to access.
Does Semrush Academy give a free certificate?
Yes. Semrush Academy's SEO Fundamentals course and most of its other courses include a free certificate upon completion. The certificate is recognized across the digital marketing industry and can be shared on LinkedIn.
Is Ahrefs Academy really free?
Yes. Ahrefs Academy's SEO Course for Beginners is free to access with no account required. The 14-lesson course covers all the core SEO concepts without requiring a paid Ahrefs subscription to follow along.
How long does it take to learn SEO basics?
You can get a solid working foundation in SEO within 5 to 10 hours of focused study. The Brainmunk course takes about 35 minutes for the overview. Semrush Academy's full course takes a few hours. Ahrefs' beginner course is similar in length. Actually implementing what you learn on a real website is where the knowledge becomes solid.
Do I need paid SEO tools to learn SEO?
No. The free tiers of Semrush and Ahrefs are sufficient to complete both courses and practice the core techniques. Google Search Console and Google Analytics are also free and cover a large portion of what paid tools provide. You do not need a paid subscription to learn SEO fundamentals.
