Best Free SEO Checkers to Analyze Your Website

I remember back in the day when getting a quick SEO audit meant manually combing through meta tags, alt text, headings, and obscure lines of code.

It was tedious and prone to error.

Thankfully, the landscape has changed, and there are several free SEO checkers that speed up the entire process and empower anyone, newbie or experienced SEO pro, to optimize websites in minutes rather than days.

I always keep a few of these free tools in my arsenal because they save me time, help me uncover hidden issues, and point me in the right direction to outrank competitors.

If you just want a quick overview of the list, here it is:

Not all are created equal, so let’s check out my top ten picks and see what each one does best.

Note: We have also made a list of the best SEO tools, if you wan the overview.

1. SEO.AI – The #1 AI SEO Platform

I work at SEO.AI, so it might not be a surprise that I’m mentioning it here, but I genuinely think it’s one of the best tools around.

It’s ranked as the #1 platform for AI SEO and is built to write and optimize for search engines with unparalleled ease.

SEO.AI’s assistants help craft descriptions, articles, and even product feeds in a way that appeals to both search algorithms and potential customers.

Key reasons SEO.AI shines:

• AI Writing & Optimization: The AI is trained to optimize content for SEO while maintaining a consistent brand voice. Whether you need a quick blog post or thousands of product descriptions, SEO.AI can handle it.
• Data-Driven Insights: The built-in SEO Score and analytics show you exactly where to improve, aligning content with Google’s algorithm.
• Integration & Automation: Connect with Google Search Console, Merchant Center, Shopify, or WordPress. SEO.AI automates repetitive tasks like meta descriptions, so you can focus on strategy.

I’ve also seen firsthand how SEO.AI’s product feed optimization leads to 15%–30% more clicks from Free Listings. For many businesses, that can be a game-changer.

2. AIOSEO’s Free SEO Analyzer

One of my personal go-to tools is AIOSEO’s Free SEO Analyzer. It gives me a snapshot of my on-page elements—titles, descriptions, headings—and flags what’s missing or incorrectly structured.

That might seem basic to some, but you’d be surprised how often I discover that I’ve forgotten something as simple as a relevant meta description.

What it’s best at:

• Basic On-Page Analysis: It clearly compares your title tags, URLs, meta descriptions, headings, and overall keyword usage.
• Readability Checks: The tool shows content clarity, making sure you’re not writing sentences that are too long or complicated.
• Improvement Suggestions: Quick wins like adding internal links and optimizing image alt text are prominent in the report.

3. Moz Free SEO Tools

Moz is a well-established name in SEO. Their suite of free tools is solid, and I typically rely on it for domain authority checks and basic on-page evaluations.

If you’re new to SEO, it feels reassuring to use a platform recognized as an industry standard.

Why Moz stands out:

• Domain Authority Insights: Moz’s domain authority (DA) metric gives a quick reading of how influential a domain is.
• Link Explorer: While not fully free, the free version of their Link Explorer tool still helps track a handful of backlinks to see if you’re building the right kind of link profile.
• Keyword Explorer: Limited in queries, but still provides valuable data about potential keywords, SERP analysis, and organic click-through rates.

4. SEOptimer

SEOptimer is for those who want a no-fuss audit. It’s straightforward—enter your URL, and it returns a complete overview of your page.

The interface is bright and clear, which helps newcomers find their way around. Many SEO tools can be quite cluttered, but SEOptimer presents data in an easily digestible way.

Standout features:

• Clear Letter Grading: You receive a letter grade (A-F) for your site. That provides an immediate indicator of overall performance.
• Actionable Recommendations: Focused on meta tags, page speed, mobile responsiveness, and security checks like HTTPS.
• Localization: It detects your region and offers location-based tips for better local SEO.

5. Seobility

Seobility is a personal favorite when I need to check more than just a single page. Although they offer paid plans, the free version is powerful enough to scan several pages a day—handy if you’re managing multiple small projects.

What I appreciate about Seobility:

1. Complete Site Audit: It goes into technical details like crawlability, broken links, and overall on-page structure.
2. Content Optimization: Their keyword-based content check can verify if you’re using relevant terms in the right places.
3. Backlink Analysis: The free version shows a snapshot of your link profile, which can uncover spammy inbound links.

6. Website Auditor by Link-Assistant

Website Auditor from the SEO PowerSuite family is a downloadable tool—setting it apart from browser-based options.

I appreciate it because it offers a thorough on-site analysis covering everything from meta tags to broken links and speed metrics.

Key qualities:

• Desktop Software: Some users prefer a desktop app over a web platform for deeper scanning.
• Site Structure Visualization: It creates a clear map of your site’s architecture, which is especially useful for large e-commerce sites.
• On-Page Resource Checks: It searches for missing images, broken JavaScript files, and even checks the robots.txt file.

7. Surfer SEO’s Free Tools

Surfer SEO has earned respect for its content optimization features. Their free tools—specifically the Keyword Surfer Chrome extension and a limited free SERP analyzer—help me assess how well a page aligns with targeted keywords.

Benefits of Surfer’s free options:

• Quick SERP Analysis: Provides details on average word count, heading usage, and partial keyword frequency.
• Keyword Surfer Extension: Displays search volumes, related keywords, and CPC information right within Google search results.
• Real-Time Content Score (Limited Access): A handy way to check content relevance against top-ranking pages.

8. SEOMator

SEOMator is one of those lesser-known yet powerful free tools. It generates a complete audit with actionable items. Its name may not be as widely mentioned as some of the bigger players, but SEOMator is rich in features.

Key highlights:

• Technical Checks: It reviews page speed, mobile readiness, and even your site’s code structure.
• Social Media Preview: Shows how your content looks when shared on social platforms.
• On-Page SEO: Provides an in-depth look at headings, meta tags, and offers suggestions for improving internal links.

9. WordStream’s Free SEO Tools

WordStream is well known for its PPC and keyword research resources. They also offer useful free SEO tools to help you find new keywords or fine-tune the ones you already target. If you like basing your SEO strategy on keyword intent, WordStream’s free resources are worth considering.

Why it’s useful:

• Keyword Niche Finder: Quickly clusters related keywords that might otherwise be missed.
• Free Keyword Tool: Generates many relevant search terms for your campaign.
• Competitor Insights: Their free blog posts and resources offer templates for analyzing competitors.

10. Backlinko’s Free SEO Tools

Backlinko is a popular resource created by Brian Dean, one of the top names in SEO. While Backlinko is famous for detailed SEO guides, they also share a variety of free SEO tools (some proprietary, some external). Occasionally, you might find a free mini-audit resource or checklist to help verify best practices.

Areas where it shines:

• Guides & Templates: Regularly offers straightforward checklists.
• Curated Tools: The blog features tried-and-tested free tools for everything from keyword research to site audits.
• Emphasis on Link Building: Constantly spotlights link opportunities and practical strategies.

Comparison Table

Sometimes it helps to see these tools side by side. Here is a brief comparison of key features:

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How to Use These Tools Effectively

All SEO checkers—free or paid—work best when supported by a solid plan. In my experience, the most practical approach is to use them in layers:

1. Technical First: Use a tool focused on technical audits, like Website Auditor or Seobility, to ensure that everything functions correctly.
2. On-Page Next: Switch to an on-page checker (such as AIOSEO or SEOptimer) to fine-tune titles, meta descriptions, and overall content structure.
3. Backlink and Authority Check: Run a domain authority test with Moz or review your link profile in Seobility to identify opportunities for better inbound links.
4. Content Optimization: Use tools like Surfer SEO or WordStream to adjust keywords, headings, and word count.

No single tool covers every aspect of SEO. Combining insights from different tools helps build a clearer picture of your website’s performance.

My Personal Workflow (A Mini-Story)

I once helped a local bakery in a small town that claimed, “We don’t need SEO because we rely on foot traffic.” They had an amazing story and unique products, so I saw a chance for them to reach more customers.

Here’s what I did:

• Step 1: I ran a free audit on AIOSEO’s Free SEO Analyzer. It found missing meta descriptions, repeated H1 tags, and no mention of “carrot cake,” their best-selling product. That meant some quick on-page fixes.
• Step 2: I used Seobility to check for hidden technical issues. It revealed that many product images had broken alt text and that some internal links pointed to outdated pages.
• Step 3: Surfer SEO’s free SERP analyzer provided details on keywords like “artisan bakery” that competitors were ranking for. We then added these terms to key site content.
• Step 4: For link building, I checked Moz’s Link Explorer and discovered the site had no inbound links from local food blogs. A simple press release helped change that.

A few months later, the bakery called to report a significant rise in catering orders from customers who found them through Google. This success confirmed that free SEO checkers, when used thoughtfully, can produce real improvements.

FAQ

What are the best free SEO checkers available?

There are several free SEO checkers that offer valuable insights into your website's performance. Some popular options include Google Search Console, Ubersuggest, and Moz's Free SEO Tools. Each of these tools provides different features, so it's worth exploring them to find the one that best suits your needs.

How do free SEO checkers help improve website performance?

Free SEO checkers analyze various aspects of your website, such as keyword usage, backlinks, and page speed. By identifying areas for improvement, these tools help you optimize your site for better search engine rankings and user experience.

Are free SEO checkers as effective as paid ones?

While free SEO checkers offer valuable insights, they may not provide the same depth of analysis as paid tools. Paid SEO tools often include advanced features, such as competitor analysis and comprehensive reporting, which can be beneficial for more extensive SEO strategies.

Can I rely solely on free SEO checkers for my website's SEO?

Free SEO checkers are a great starting point for improving your website's SEO, but relying solely on them may limit your ability to fully optimize your site. Combining free tools with other SEO strategies and possibly investing in paid tools can provide a more comprehensive approach to enhancing your website's performance.