Free Keyword Difficulty Checker
Enter any keyword or phrase and get an instant heuristic difficulty score from 0 to 100, keyword intent classification, related keyword suggestions from Google Autocomplete, and a CPC tier estimate. All free, no API key or account required.
What is keyword difficulty?
Keyword difficulty is an estimate of how hard it will be to rank on the first page of search results for a given keyword. Higher difficulty means more established sites are already competing for that keyword with high-quality content and strong backlink profiles.
Paid tools like Ahrefs and Semrush calculate difficulty using domain authority, backlink counts, and SERP feature presence. This tool uses a heuristic approach — word count, commercial signal words, question structure, and autocomplete volume — to give you a fast ballpark score without requiring any API subscription.
How the difficulty score is calculated
Single-word keywords start at a high base score (+20) because they typically have massive search volume and many competing pages. Long-tail keywords with 4 or more words score much lower (-10 to -20) — they have less competition and are easier to rank for.
Keywords containing commercial intent words like "best", "top", "review", "vs", or "compare" get a +15 bonus. These keywords attract advertiser spending and editorial competition from affiliate sites. Similarly, transactional words like "buy" or "price" add +10.
Keywords starting with "how", "what", "why", or containing "guide" or "tutorial" get a -10 reduction. These informational queries can be answered well by a single authoritative article — the competition tends to be around content quality rather than domain authority.
The count of Google Autocomplete suggestions for a keyword indicates how actively people are searching variations of it. More related suggestions (up to +10 points) reflect stronger search intent and higher competition from optimised pages already targeting those variations.
Keyword intent types
- The searcher wants to learn something. Examples: "how to do SEO", "what is domain authority", "why is my page not indexed". These keywords have high volume but lower conversion rates — best for top-of-funnel content, guides, and blog posts. Monetise with display ads or lead magnets rather than direct sales.
- The searcher is researching before making a purchase decision. Examples: "best SEO tools", "ahrefs vs semrush", "keyword research tool review". These are high-value keywords for affiliate content and comparison pages. CPC is typically high because advertisers compete aggressively for these queries.
- The searcher is ready to take action — buy, sign up, download, or get a price. Examples: "buy keyword research tool", "seo software price", "free keyword checker". These convert well but face stiff competition from landing pages and product pages with high domain authority. Best served with dedicated conversion-optimised pages.
- The searcher wants a specific website or brand. Examples: "Ahrefs login", "Google Search Console", "Moz blog". These are very hard to rank for because the target destination is the brand itself. Unless your site is the brand being searched for, avoid targeting navigational keywords.
How to use keyword difficulty scores in your SEO strategy
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1
Find your baseline
Check the difficulty of your current target keywords. If you are a new site, focus on keywords with a score below 40. Established sites with domain authority above 50 can compete for scores up to 70.
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Identify long-tail opportunities
Use the related keywords table to find longer variations of your primary keyword. A 3-5 word version of the same topic typically has a 20-30 point lower difficulty score while still capturing relevant search intent.
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3
Match intent to content format
Create the content format that fits the intent: guides and how-to articles for informational keywords, comparison posts for commercial keywords, and landing pages for transactional keywords.
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Verify with on-page audit
Once you have published content for a keyword, use the Page SEO Score tool to confirm your page has the right title, canonical, structured data, and content signals in place.
Frequently asked questions
- Yes, completely free with no account required. The core difficulty score uses a heuristic algorithm that needs no third-party API keys. Google Autocomplete suggestions are also free. The optional SERP analysis via Google Custom Search API requires your own API key set on the server — this is for self-hosted deployments only.
- The heuristic score correlates well with real-world difficulty for most keyword types, but it is not a replacement for paid tools that analyse domain authority distributions, backlink profiles, and SERP feature presence. Use this tool for quick triage and ideation — for production keyword research, validate with Ahrefs, Semrush, or Google Keyword Planner.
- CPC tier (cost-per-click tier) is an estimate of how much advertisers pay per click on Google Ads for similar keywords. High tier ($5+) typically applies to transactional or commercial keywords in competitive industries. Medium tier ($1-5) applies to most commercial terms. Low tier covers informational queries where advertisers pay less. The tier is an estimate only — actual CPC varies significantly by industry.
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Yes. Send a POST request to
/api/v1/keyword-difficulty/checkwith a JSON body containing{ "keyword": "your keyword here" }. The API returns the difficulty score, intent, CPC tier, and related keywords. See the API documentation for full details.
Related tools
- → SEO Site Audit — crawl your whole site for 22 SEO issues including missing titles and canonicals
- → Page SEO Score — get a 0-100 on-page SEO score for any individual URL
- → Sitemap Validator — check every URL in your sitemap for broken links and noindex pages
Related reading: Keyword Mapping — How to Map Keywords to Pages