How to Use the Free Keyword Difficulty Checker

What keyword difficulty means

Keyword difficulty, also referred to as Keyword Difficulty Index (KDI), measures how hard it is to rank in the top search results for a specific keyword. Understanding keyword difficulty helps you identify terms where your content has a realistic chance of appearing on the first page of search results.

A high keyword difficulty score indicates that the top-ranking pages for a keyword are well-established, have strong authority, and are highly optimized. Conversely, a low score suggests the top results may be less authoritative or less optimized, presenting a greater opportunity for new or less established sites to rank.

How the checker calculates its score

The LemRank free keyword difficulty checker generates a score between 0 and 100 for any given keyword. This score is derived by analyzing the live top-10 Search Engine Results Page (SERP) for that keyword.

The calculation combines several factors:

• Domain authority of top-10 results: This assesses the overall strength and trustworthiness of the websites currently ranking on the first page. Sites with high domain authority are generally harder to outrank.
• Keyword-in-title frequency: The checker identifies how many of the top 10 ranking pages include the exact keyword within their page titles. A higher frequency suggests that the keyword is a primary focus for existing content, potentially making it more competitive.
• SERP feature density: This accounts for the presence of various elements on the SERP, such as featured snippets, People Also Ask boxes, image packs, or video carousels. While some SERP features can offer opportunities, a dense SERP with many specialized features can indicate strong competition or a specific type of content need that may be harder to address.

By integrating these metrics, the checker provides a single numerical representation of a keyword's ranking challenge.

Reading the score with the KDI bands

The KDI score provides a useful range of difficulty, and LemRank categorizes these into bands to help you interpret the results. These bands offer guidance on the typical resources and time commitment required to rank for keywords within each range.

• Less than 30 (0-29): Keywords in this range are generally considered realistic for new websites or those with low domain authority. They often represent long-tail keywords or niche terms with less competition. Ranking for these can provide early organic traffic and help build site authority.
• 30–50: Keywords within this band typically require more authority and time to rank effectively. Sites with some existing content and moderate domain authority may find success here, but consistent effort and optimization are usually necessary.
• 50–70: Achieving top rankings for keywords in this range usually demands consistent publishing of high-quality, in-depth content. Sites targeting these keywords generally need established authority, a strong content strategy, and ongoing SEO efforts.
• 70+: These keywords are highly competitive and are generally the domain of large, well-established websites with significant authority and extensive resources. New or smaller sites will find it very challenging to rank for these keywords.

For example, a new blog launching today would likely focus on keywords with a KDI of less than 30. An established industry leader might target keywords with KDI scores of 50-70 or higher, leveraging their existing authority.

Difficulty vs volume vs intent — using all three

While keyword difficulty is a critical metric, it is important to consider it alongside search volume and user intent for comprehensive keyword research.

• Search Volume: This indicates how many times a keyword is searched per month. A high search volume suggests greater potential traffic, but also often correlates with higher difficulty. A low search volume keyword, even with low difficulty, might not drive enough traffic to justify content creation.
• User Intent: This refers to the underlying purpose of a user's search. Do they want to buy something (commercial intent), learn something (informational intent), find a specific website (navigational intent), or are they looking for a local business (local intent)? Targeting the right intent ensures that your content meets the user's needs, which is crucial for engagement and conversions.

Consider the following scenarios:

• High Volume, Low Difficulty: This is often an ideal scenario, indicating a potentially untapped opportunity. However, such keywords are rare.
• High Volume, High Difficulty: These are often "head terms" that are very desirable but extremely competitive. While you might want to rank for them eventually, they are not usually suitable targets for initial content.
• Low Volume, Low Difficulty: These are often long-tail keywords. Individually, they might not bring much traffic, but collectively they can form a significant portion of a site's organic traffic. They are excellent targets for new sites.
• Low Volume, High Difficulty: These keywords are generally not worth pursuing unless they have extremely high commercial intent or are critical to a very specific niche audience.

By evaluating keywords based on all three factors — difficulty, volume, and intent — you can create a balanced keyword strategy that targets achievable rankings while also driving relevant traffic that aligns with your business goals.

Bulk-checking dozens of keywords

The free keyword difficulty checker also allows for bulk analysis, enabling you to assess multiple keywords efficiently. You can enter keywords one per line into the input field. The tool will then process each keyword individually, returning its difficulty score.

For example, if you have a list of potential topics for a new blog, you can paste them all at once:

best noise cancelling headphones
budget wireless earbuds
headphones for running
studio monitor headphones review
open back headphones for gaming

The checker will then provide a KDI score for each, allowing you to quickly prioritize your content strategy based on the likely effort required to rank. This feature is particularly useful for content planning, competitive analysis, or when generating preliminary keyword lists.

When to use the paid keyword research tool instead

While the free keyword difficulty checker is a valuable tool for quick assessments and bulk analysis of known keywords, the full-featured LemRank paid keyword research tool offers more comprehensive capabilities for in-depth analysis and discovery.

Consider upgrading to the paid tool when you need to:

• Discover new keywords: The paid tool can generate extensive lists of related keywords, long-tail variations, and questions people ask, expanding beyond your initial seed keywords. The tool's keyword cache harvests suggestions from 12 free sources including Google Suggest, Bing Suggest, Reddit, YouTube, Wikipedia, Amazon, and People Also Ask, before falling back to paid APIs for even broader coverage.
• Analyze competitor keywords: Identify what keywords your competitors are ranking for and the performance metrics associated with them.
• Track keyword rankings: Monitor your website's position in search results for target keywords over time.
• Filter and segment data: Apply advanced filters to keyword lists based on difficulty, volume, SERP features, and other metrics to refine your strategy.
• Access historical data: View trends in search volume and difficulty over time to understand keyword seasonality and long-term viability.
• Perform content gap analysis: Identify keywords for which your competitors rank, but you do not, revealing opportunities for new content.

The free checker focuses on providing a quick difficulty score for keywords you already have in mind. The paid tool is designed for systematic keyword discovery, competitive analysis, and ongoing SEO strategy development.

Related

• Keyword Difficulty Checker guide
• Keyword Golden Ratio