Jun 8, 2023

5 Best Keyword Density Checker Tools To Optimize Your Content

Suman Samal, Asst. Marketing Manager
Suman Samal
5 Best Keyword Density Checker Tools To Optimize Your Content
Suman Samal, Asst. Marketing Manager
Suman Samal
Jun 8, 2023

5 Best Keyword Density Checker Tools To Optimize Your Content

Learn more about keyword density and how it affects your content. Optimize your content with these 5 best keyword density checker tools.
5 Best Keyword Density Checker Tools To Optimize Your Content

Table of contents

A well-optimized website is the key to building a successful online presence. To make sure that your website ranks high on search engines, it is important to master the art of keyword density. 

A well-optimized website is the key to building a successful online presence. To make sure that your website ranks high on search engines, it is important to master the art of keyword density. In this blog, we will discuss what keyword density is and how it contributes to content optimization. We will also share a detailed list of 5 best keyword density checker tools for SEO so you can pick the one that fits your requirements.

What is Keyword Density?

Keyword density is the percentage of times a keyword appears on a webpage compared to the total words. Earlier, keyword density was prioritized more for SEO optimization. However, the current trends dictate the need to focus more on making helpful, high-quality content that offers value to users. A keyword density of 2.5% is recommended, but overuse can lead to keyword stuffing and hurt search engine rankings.

Why is Keyword Density Important for SEO?

Keyword density is crucial for SEO as it helps search engines comprehend the page's content and rank it appropriately. Here is how: 

Relevance and User Intent

Keyword density serves as an indicator of how closely your content aligns with a particular topic or search query. It helps search engines understand the primary focus of your content and its relevance to user intent.

Search Engine Rankings

Proper keyword usage and density contribute to higher search engine rankings. When search engines identify a keyword's presence in a piece of content, they associate it with the topic, boosting its visibility in search results.

Contextual Understanding

Keyword density provides context to search engines about the overall theme and subject matter of your content. By analyzing the density, search engines can determine whether your content is comprehensive and informative.

Finding the Right Balance

Excessive use of keywords can result in keyword stuffing, which search engines penalize. Maintaining optimal keyword density can improve SEO and increase website traffic. Here is how you can find the right balance: 

Natural and Engaging Content

Keyword density should never compromise the quality and readability of your content. Overstuffing keywords can lead to an awkward and unnatural flow, negatively impacting the user experience. Aim for a smooth integration of keywords within the content.

Keyword Proximity

Instead of focusing solely on keyword density, it is equally important to consider the proximity of keywords within your content. Placing keywords strategically in prominent areas like headings, subheadings, and the opening and closing paragraphs can enhance their impact.

Variation and Synonyms

Instead of repeating the same keyword excessively, incorporate variations and synonyms to diversify your content. This approach not only helps avoid keyword stuffing but also allows you to target multiple related search queries.

Keyword Density Range

While there is no fixed ideal keyword density, it is generally recommended to aim for a range between 1% to 2.5% to strike the right balance. However, keep in mind that different industries and topics may require adjustments based on competitiveness and keyword length.

Monitoring and Optimization

By carefully monitoring and optimizing keyword density, content marketers can enhance their content's visibility, relevance, and overall search engine optimization (SEO) performance. Optimizing your web page's keyword density involves using a variety of SEO tools like a keyword density checker or analyzer tool. 

You must be mindful of not using too many stop words or stuffing your text box with too many keywords that are irrelevant to your target audience. Instead, focus on including relevant keywords naturally throughout your webpage's text content.

In this section, we will cover 3 basic factors that help monitor and optimize keyword density:

Keyword Research: Thorough keyword research is essential to identify relevant and high-performing keywords for your content. Utilize keyword research tools to discover popular search terms and their search volumes.

Analytical Insights: Regularly monitor the performance of your content using analytics tools to identify keywords that are driving traffic and engagement. This data can help you optimize your content further.

Evolving SEO Practices: Keep in mind that search engine algorithms constantly evolve. Stay updated with the latest SEO best practices and algorithmic changes to adapt your keyword density strategy accordingly.

Common Mistakes to Avoid in Keyword Density

To optimize keyword density, it's essential to avoid common mistakes that could harm your webpage ranking. Keyword stuffing is frowned upon by search engines, so it's vital to use related terms and incorporate long-tail keywords to increase relevance. 

It's also important not to overlook user experience and readability when optimizing for keyword density. Be sure to stay up-to-date with changing search engine algorithms and adjust your strategy accordingly for optimal results in SERP rankings. 

Here are some common mistakes to steer clear of when working with keyword density:

Keyword Stuffing

Perhaps the most significant mistake to avoid is keyword stuffing, which refers to excessively using keywords in an attempt to manipulate search engine rankings. This practice not only makes your content awkward and unnatural to read but also violates search engine guidelines. 

Keyword stuffing can lead to penalties and a negative impact on your website's visibility in search results. Instead, focus on incorporating keywords naturally and providing valuable content to your audience.

Ignoring User Intent

A common mistake is solely focusing on keyword density without considering the intent behind user searches. Search engines aim to provide users with the most relevant and helpful results, so it's crucial to align your content with user intent. 

Rather than obsessing over keyword frequency, prioritize creating comprehensive, informative, and user-friendly content that addresses the needs and queries of your target audience.

Lack of Semantic Variation

Using the exact same keyword repeatedly throughout your content can be monotonous and may raise red flags to search engines. Instead, leverage semantic variations and synonyms related to your target keywords. 

This approach diversifies your content and helps you capture a broader range of relevant search queries. Strike a balance between keyword usage and natural language to provide a more engaging user experience.

Neglecting Content Quality

Focusing solely on keyword density can lead to neglecting the overall quality of your content. Remember, your primary goal should be to provide value to your readers. If your content lacks substance, is poorly written, or lacks organization, even the most optimized keyword density won't save it. Prioritize creating high-quality, informative content that engages your audience and encourages them to spend more time on your website.


While optimizing your content for keywords is essential, over-optimization can be detrimental. Keyword density should be seen as a guide rather than a strict rule. If you forcefully insert keywords into every sentence or paragraph, it may result in an unnatural flow and negatively impact the readability of your content. Aim for a natural, conversational tone while incorporating keywords strategically.

Neglecting Analytics

Failure to monitor and analyze the performance of your keywords can hinder your ability to make data-driven optimizations. Utilize analytical tools to track keyword rankings, traffic sources, and user engagement metrics. By analyzing this data, you can gain insights into which keywords drive the most traffic and conversions, allowing you to refine your keyword density strategy and prioritize high-performing keywords.

Examples of Over-Optimization and Under-Optimization

Balancing the use of keywords is essential for effective SEO; over-optimization by stuffing too many keywords in irrelevant ways can lead to penalties from search engines. For example:

  1. "Looking for the best pizza in New York? Our New York pizza restaurant serves the best pizza in New York. If you're craving pizza in New York, visit our New York pizza joint today!"

In this example, the keyword "New York pizza" is excessively used, resulting in an unnatural and repetitive flow. It's clear that the primary focus is on including the keyword multiple times rather than providing valuable content.

  1. "Our gardening tools are the best gardening tools for all your gardening needs. With our gardening tools, you can transform your garden into a beautiful garden paradise. Buy our gardening tools now!"

Here, the phrase "gardening tools" is repetitively inserted without considering the context. The excessive use of the keyword doesn't contribute meaningfully to the content and feels forced.

On the other hand, under-optimization with fewer relevant keywords can result in poor visibility and low traffic. For example:

  1. "Our store offers a variety of products to meet your needs. Our team is dedicated to providing excellent customer service and ensuring your satisfaction. Visit us today!"

In this example, there is a lack of relevant keywords related to the products or services offered. While the content reads naturally, it misses the opportunity to optimize for specific keywords that would enhance search engine visibility.

  1. "Welcome to our travel blog. We love traveling and sharing our experiences with you. Check out our latest post about a recent trip to Europe!"

Although this content focuses on travel, there is a missed opportunity to strategically place relevant keywords. Incorporating keywords related to specific travel destinations or topics would provide more context and increase the chances of attracting targeted organic traffic.

Now that you know how keyword density can affect SEO, let’s check the best keyword density checker tools available in the market.

5 Best Keyword Density Checker Tools for SEO

  1. Scalenut Keyword Density Tool

Scalenut is an AI-powered SEO and content marketing platform that offers one of the best Keyword Density checker tools. The tool is available under the Optimize section in the Content Optimizer on the dashboard. It generates a list of top questions across multiple channels that are related to the keyword you are targeting. All you have to do is to copy and paste your content link and click on the "Optimize" segment in the Content Optimizer tool.

Scalenut’s Content Optimizer offers a quick and efficient way to optimize your content for SEO

Once you open this tool, you will come across the following page:

 Scalenut’s Content Optimizer helps you optimize your content efficiently

You can optimize your existing content by pasting the URL in the uppermost box and entering your targeted keyword and location in the lower box. Then, click on the ‘Create.’

On the next page, you will find the Keyword Density tool among multiple other tools to make your content SEO optimized. Here is how it looks:

Scalenut’s Editor helps you check keyword density in your content

This tool shows you the keyword density for the highest frequency keywords and primary & secondary keywords. Additionally, it also marks out the keywords that you need to use more or less of, and by what percentage, throughout the content.

Apart from the keyword density checker in the Editor, Scalenut also offers a free keyword density checker to help you maximize your online visibility. 

Benefits of Using Scalenut's Keyword Density Checker Tool

In-depth Analysis

The tool conducts a thorough analysis of your content to ascertain whether every key term used in it appears an appropriate number of times or not. This, in turn, ensures that you can easily optimize all the key terms in one go.

Analyses Primary and Secondary Keywords

The best part is that the tool not only focuses on primary keywords but also pays equal attention to secondary keywords. It means that the users also get detailed insights, without having to refer to separate metrics for primary and secondary keywords.

Lists the Highest Frequency Keywords

The tool also highlights the overall appearance of the highest-frequency keywords in the content, as demonstrated in the above image. This gives users the opportunity to tweak the content accordingly.

Marks Out Over or Under-use of Keywords  

The keyword density tool also points out which keywords are used more than necessary and which keywords need to be mentioned more. The users can quickly increase or decrease their appearance throughout the content to make it more SEO optimized.

Seamless with Real-Time Analysis

While the users are making changes to the content by increasing or decreasing the appearance of listed keywords, the percentage of those keywords keeps changing in real-time. This process is completely seamless and very fast, which means the users don't have to wait for even a second for the analysis process to complete.

Shows the Percentage

The tool also highlights the usage percentage for every keyword so the users can get a vague idea of how many times they have to remove or add any particular keyword.

Plans and Pricing

Scalenut offers three plans – Essential, Growth, and Pro, which you can subscribe to on a monthly or annual basis. The Essential Plan starts at $23/mo billed annually for 100,000 AI words. 

  1. Keyword Density Analysis Tool by Internet Marketing Ninjas

The Keyword Density Analysis Tool by Internet Marketing Ninjas is a free tool that can analyze the keyword distribution within a webpage. The report includes several valuable insights such as the total number of words present on the page, the number of words that are hyperlinked, and the number of words that are not linked. Additionally, the tool identifies and counts the occurrence of stop words or very short words within the non-linked text.

 Keyword Density Analysis Tool by Internet Marketing Ninjas finds out the keyword density of your content

Plans and Pricing

The tool is free for everyone to use. 

  1. Online Keyword Density Checker by Copywritely

Copywritely offers a convenient solution to analyze the word use percentages of your text to identify instances of keyword stuffing. The tool allows you to input a URL or copy and paste text, enabling quick analysis of your content.

Online Keyword Density Checker by Copywritely finds out the keyword density of your content

Plans and Pricing

To check 50 pages per month, you have to pay $29 per month. 

  1. Keyword Density Checker by SEO Review Tools

SEO Review Tools’ keyword density checker tool one of its comprehensive SEO analysis tools. This tool stands out from others due to its unique search-based option, in addition to the traditional URL and text input methods.

Keyword Density Checker by SEO Review Tools finds out the keyword density of your content.

Plans and Pricing

The tool is free for everyone to use. 

  1. SEO Keyword Density Checker by Sitechecker Pro

Sitechecker Pro offers a comprehensive keyword density analyzer that gives reports in two minutes. Upon completion, users receive a detailed report via email, highlighting various issues that may impact keyword performance. The report covers essential aspects such as keyword density, links, indexability, content relevance, security, and page speed. Within each section, specific suggestions are provided to guide users in optimizing their SEO performance.

SEO Keyword Density Checker by Sitechecker Pro finds out the keyword density of your content.Plans and Pricing

The cheapest plan called Basic costs $33 per month. 

How to choose the best SEO tool for your business 

When choosing the best SEO tool for your business, consider the following features and factors:

  • Comprehensive Keyword Research: Look for a tool that offers robust keyword research capabilities, including keyword suggestions, search volume data, competition analysis, and long-tail keyword identification.
  • On-Page Optimization: The tool should provide insights and recommendations for optimizing on-page elements such as meta tags, headings, URL structure, and internal linking to improve search engine visibility.
  • Backlink Analysis: A good SEO tool should offer backlink analysis features to help you evaluate the quality and quantity of backlinks pointing to your website, identify potential opportunities, and monitor competitor backlink profiles.
  • Rank Tracking: Ensure the tool allows you to track keyword rankings across search engines, providing regular updates and historical data to measure your website's performance and identify areas for improvement.
  • Site Auditing: Look for a tool that can perform website audits, checking for issues such as broken links, duplicate content, page speed, mobile-friendliness, and other technical SEO factors.
  • Competitor Analysis: The tool should provide insights into your competitors' organic search strategies, including their top-ranking keywords, backlinks, and content strategies, helping you identify opportunities and stay ahead in the competition.
  • Reporting and Analytics: Consider tools that offer comprehensive reporting capabilities, including customizable reports, integration with Google Analytics, and data visualization to track progress, measure success, and demonstrate the impact of your SEO efforts.
  • User-Friendly Interface: Ease of use is essential, so choose an SEO tool with an intuitive interface that allows you to navigate and access features efficiently without a steep learning curve.
  • Customer Support: Evaluate the level of customer support provided, including access to documentation, tutorials, FAQs, and responsive support channels to address any queries or issues you may encounter.
  • Pricing and Scalability: Consider your budget and the scalability of the tool as your business grows. Compare pricing plans and features to ensure you choose an SEO tool that aligns with your current needs and future growth.

On-page SEO tools FAQs

How can an on-page SEO tool benefit my website?

On-page SEO tools offer valuable insights and recommendations to enhance the on-page elements of your website, such as meta tags, headings, content, internal linking, and more. By implementing these suggestions, you can improve your website's relevancy, user experience, and overall search engine performance.

Can on-page SEO tools help with keyword research?

Yes, many on-page SEO tools include keyword research functionality. They provide keyword suggestions, search volume data, competition analysis, and other metrics to help you discover relevant keywords and optimize your content accordingly.

Are on-page SEO tools suitable for beginners?

Yes, on-page SEO tools are designed to be user-friendly, making them suitable for beginners. They often offer intuitive interfaces, step-by-step guidance, and helpful documentation or tutorials to assist users in optimizing their web pages effectively.


To sum up, keyword density is a crucial factor for SEO success. It helps you optimize your content for relevant keywords, improve your website ranking, and attract more organic traffic. However, it's essential to maintain the right balance of keywords and avoid any over-optimization that may lead to penalties from search engines. 

By using the best keyword density checker tools and following the best practices, you can achieve optimal results for your website's SEO. Sign up on Scalenut today for 7-day free access, and check out all the free tools.

Suman Samal
Asst. Marketing Manager
ABout the AUTHOR
Suman Samal
Asst. Marketing Manager

Suman Samal is a Asst. Marketing Manager at Scalenut. She is a technology enthusiast with a keen interest in content marketing and SEO. She truly believes that with the right set of tools every organization can improve the ROI of their content marketing campaigns. She spends her time managing content operations at Scalenut and ensuring that everything we publish is of the highest quality.

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