SERP Similarity Tool: Check SERP Overlap (Free)

Why use a SERP similarity checker for SEO?

Here are some practical reasons why using a SERP similarity tool can level up your SEO strategy:

• Save time: Instead of manually checking search results, get instant comparison data.
• Improve content planning: Know whether to create one strong page or multiple pages for different keywords.
• Understand keyword intent better: If two keywords show the same results, their search intent is likely the same.
• Avoid keyword cannibalization: Grouping related keywords correctly ensures that your pages don’t compete against each other.
• Increase content efficiency: By targeting multiple related keywords in a single article, you can maximize the value of your content.

For example, if you’re wondering whether “best running shoes” and “top sneakers for running” can be covered in the same article, our tool will quickly show you how much the SERPs overlap.

If the similarity score is high, you can confidently address both keywords in one well-optimized post.

How to check SERP similarity (Step-by-step guide)

Step 1: Choose your keywords

Think of the keywords you want to compare.

• Start with two keywords that seem similar.
• Optionally, add a third keyword to get a broader comparison.

Examples:

• “best email marketing tools”
• “top email automation software”
• “email CRM platforms”
  

Step 2: Enter the keywords and select your preferred country in the tool

Go to the input section on this page.

• Type keyword 1 in the first box.
• Type keyword 2 in the second box.
• If you want to add a third keyword, use the optional box.
• Next, select the country to get personalized SERP data.

👉 You must enter at least two keywords to run the tool.

Step 3: Click the “Compare” button

After entering your keywords, click the Compare button.
The tool will instantly start fetching organic search results for all the keywords.

You don’t need to log in or wait long—results load in seconds.

Step 4: View the SERP overlap visualization

Once the data is ready, you’ll see:

• A Venn diagram showing keyword overlap
• The number of common URLs shared between keywords
• A list of all top-ranking URLs for each keyword
• Highlighted mutual URLs that appear in multiple SERPs

This helps you understand how much similarity exists between the keywords.

Step 5: Analyze the results

Now, use the data to decide:

• Should you target all keywords on one page?
• Are the search intents too different?
• Which pages are ranking across multiple keywords?

This step is useful for content clustering, SEO audits, and ranking strategy.

Step 6: Download the data (optional)

If you want to save your results, click the Download CSV button.
You’ll get a file with:

• Keyword comparison
• List of URLs
• Mutual vs unique results

This is helpful for SEO reporting, client audits, or keyword research documentation.

How is this tool different from other SERP checker tools?

Most SERP tools focus on metrics like keyword volume, CPC, and ranking difficulty. While those are useful, they don’t always show how Google interprets the intent behind a keyword.

Our tool does one thing really well: it compares the actual URLs ranking for each keyword side by side. This gives you real-world SERP overlap data, not just estimations or keyword suggestions.

Unlike other tools like:

• keyword SERP tool (focuses on ranking position)
• serps keyword tool (used for broad keyword discovery)
• serp checker multiple keywords (limited comparison scope)
  
  

This tool provides direct SERP insights for intent-based clustering, content planning, and SEO validation.

Final thoughts

Keyword strategy is no longer just about volume or difficulty. It’s about understanding the search landscape. Our SERP Similarity Checker gives you the power to make smarter SEO decisions based on real-time data. 

Whether you’re building a content cluster, planning a new blog series, or optimizing your landing pages, this tool will help you avoid guesswork and create content that truly matches search intent.

Ready to optimize your SEO strategy with real insights?

Try our SERP Similarity tool today and make every piece of content count!

1. What is SERP similarity?

SERP similarity refers to how many common URLs appear in the top search results for two or more keywords. When several of the same pages rank for different keywords, it means Google sees those keywords as related in meaning or user intent. 

This is useful for SEO planning because it tells you whether keywords can be grouped together on one page or need separate pages to perform well.

2. Why is checking SERP similarity important for SEO?

Checking SERP similarity helps you make better content decisions. If two keywords have high SERP overlap, you might only need one page to rank for both. 

This avoids keyword cannibalization—where your pages compete with each other—and allows you to focus on writing stronger, more targeted content. It’s also helpful for keyword clustering and understanding how Google interprets search intent.

3. How many keywords can I compare using this tool?

You can compare up to three keywords at a time. The first two are required, and the third is optional. This gives you flexibility when analyzing keyword groups, especially during large content planning or when building topic clusters.

4. How accurate is the data?

The tool fetches real-time organic search results directly from Google. This means the comparison reflects what users currently see in their SERPs. 

The accuracy depends on your keyword choice and the region being queried. 

5. What do the overlapping URLs mean in the Venn diagram?

The overlapping section of the Venn diagram shows the mutual URLs—pages that appear in the search results for more than one keyword. 

This overlap indicates a strong relationship between the keywords. The more shared URLs you see, the more likely those keywords can be targeted on the same page or share similar intent.

6. Can I use this tool for content clustering?

Yes, this tool is ideal for content clustering. It helps you identify keywords with shared intent by checking if they rank for the same pages. 

You can group these keywords into one pillar page or create interlinked supporting articles based on how closely they align in the SERPs.

7. Is the SERP data region-specific?

At the moment, the tool uses default U.S. SERPs, which is standard for many SEO tools. However, we plan to add support for multiple locations and languages soon. For now, if your content targets global or U.S.-based audiences, the results are highly relevant.

8. Do I need to sign up or create an account to use the tool?

Yes, you’ll need to create a free account to access the tool. It only takes a few seconds to sign up, and once you’re in, you can use the SERP similarity tool as many times as you want each day— with no limits.

Creating an account also ensures faster access and lets you save or track your previous comparisons in the future.

9. What’s the difference between this and a regular keyword tool?

Most keyword research tools show metrics like search volume, competition, or CPC. While useful, they don’t tell you how Google treats different keywords in terms of actual ranking pages. 

This SERP similarity tool shows you which URLs appear across different keyword searches—giving you direct insight into search intent and ranking overlap.

10. Can I export the results?

Yes. After running a comparison, you can download the full data as a CSV file. This includes the keywords, mutual URLs, and separate rankings for each keyword. It’s great for documentation, audits, client reports, or building internal SEO strategies.