Free SEOBook Keyword Density Tool Alternative
- SEOBook's keyword density tool has been around since the early days of SEO — basic and functional
- Limitation: no phrase analysis (bigrams/trigrams), URL-based input, dated interface
- Free alternative: paste any text including unpublished drafts, see phrases + single words
- No account required for either tool — both are free
Table of Contents
SEOBook's keyword density tool is one of the oldest free SEO tools available — it's functional and has no ads, but it's limited to single-word analysis and lacks phrase-level frequency data. A free browser-based alternative gives you the same density numbers plus 2-word and 3-word phrase analysis from any text you paste — no URL required.
What SEOBook's Keyword Density Tool Does Well
SEOBook has been a trusted name in SEO since the mid-2000s. The keyword density tool is clean, ad-free, and delivers straightforward single-keyword frequency analysis. For a quick check of a live URL with no frills, it gets the job done.
There's no account required, no rate limit on casual use, and the results are easy to read. If you're already in the SEOBook ecosystem, it's a reasonable first stop.
Where SEOBook's Tool Falls Short
- No phrase analysis: SEOBook shows individual word frequencies but doesn't track 2-word or 3-word phrase density. For modern SEO, multi-word keyword analysis is essential — "content marketing" density matters as much as "content" or "marketing" separately.
- Limited input options: The tool is designed for analyzing live URLs, which means you can't check draft content before it's published.
- Dated interface: The tool hasn't been substantially updated in years — the UI is functional but not optimized for today's workflows.
- No stop word filtering toggle: Results mix content words with filler words without clear separation.
What the Free Alternative Adds
- Phrase analysis: See density for single words, 2-word phrases, and 3-word phrases in one pass — critical for long-tail keyword optimization.
- Paste any text: Works on draft content, emails, product descriptions, landing page copy — anything you can paste, not just published URLs.
- Stop word filtering: Common words are automatically filtered so your results focus on content words, not articles and prepositions.
- Total word count displayed: Shown alongside results so you can verify the density calculation denominator.
Which Tool to Use for Which Task
- Use SEOBook when: You want a quick density scan of a live published page and single-word analysis is sufficient.
- Use the free alternative when: You're writing or editing content in a draft, need phrase-level analysis, or want to check density before publishing.
Try the Free Alternative
Paste your text for instant keyword density + phrase analysis — single words, 2-word, and 3-word phrases in one pass.
Open Free Keyword Density AnalyzerFrequently Asked Questions
Is SEOBook still maintained?
SEOBook's tools are still online but haven't seen major feature updates in recent years. The site's primary activity has shifted to its blog and membership content. The keyword density tool is functional but frozen in its current form.
Does SEOBook's tool require a login?
No — the basic keyword density tool is free and doesn't require an account. Some premium SEOBook features are behind a membership paywall, but the density tool is publicly accessible.
Do both tools filter stop words?
SEOBook shows all words including stop words at the top of results, making it harder to spot content words quickly. The alternative tool filters stop words automatically so your first screen of results shows the words that actually matter.
