Free Tool
Keyword Density Checker — Free SEO Keyword Density Tool
Measure keyword frequency and avoid stuffing with exact density percentages. See which terms dominate your content and optimize naturally — no signup required.
- Exact density percentage
- Runs in your browser
- Frequency table
Paste content and enter a primary keyword to see density analysis.
Count what you actually wrote
Writing for a keyword makes you repeat it. You start deliberately, then it creeps in — subheadings, image alt text, the conclusion — and by the time you finish, the page reads like it was written for a machine. Which is exactly the impression you were trying to avoid.
This checker gives you the number. Paste your content, enter your keyword, and see precisely how often it appears and what percentage of the text it represents.
What a good density actually is
There is no magic number, and anyone quoting one precisely is inventing it. The useful framing is a range rather than a target.
The panel beside this is an illustration of that problem: a service page measuring 5.2% because the phrase sat in every subheading, the first sentence of most paragraphs, and twice in the conclusion. Replacing most of those with pronouns and related terms brought it to 1.6% — and it read like a person wrote it.
- Roughly 1–2% reads naturally for a primary keyword.
- Past 3–4% it starts to sound repetitive — and the reader notices before any algorithm does.
- Too low matters too. A 2,000-word article that names its topic twice is unclear about what it covers.
- Read it aloud. If you notice the keyword, it is too dense. The number simply confirms what your ear already told you.
“email automation” · 1,840 words
The same page before and after the rewrite.
The frequency table is the underrated part
Most people come for the density percentage and get more value from the frequency list. It shows which words genuinely dominate your content — and that is often not the keyword you intended.
- An article meant to be about “email automation” that mentions “software” thirty times and the actual topic four times is about software, whatever the title says.
- That mismatch between intended topic and actual language is a common reason pages underperform, and it is invisible until you count.
- Leave strip common words on, or your top three results are “the”, “and” and “to”. With it on you see the terms that actually characterise the page.
Secondary keywords matter more than density
Modern search understands related terms, so a page covering a topic properly uses the vocabulary that surrounds it — not the same phrase repeated.
- Enter your secondary keywords as a comma-separated list and check whether they appear at all.
- A page about email marketing that never mentions open rates, subject lines or deliverability is thin, however often it says “email marketing”.
- Adding the missing related terms is almost always more valuable than adjusting the density of the main one.
Your draft never leaves your browser
The counting happens in the page you are looking at. There is no upload step and no sign-up, so a client draft or an unpublished post can go in without going anywhere.
- The analysis runs entirely in your browser — the text is never sent to us.
- If you ask for the emailed summary, exactly four fields travel: your email address, the word count, the density percentage and its status band.
- The text itself is never one of them, whether or not you ask for the email.
Four numbers worth keeping
Why Parix.ai gives this away
We build SEO-ready websites and AI automation for a living. These tools are the same checks we run for clients, put on a public page. They are how people find us — which is the whole reason there is no paywall, no trial and no sign-up on any of them.
Check my draftWho uses it
Content writers checking a draft before publishing. SEO auditors diagnosing pages that read as spammy. Bloggers who write to a keyword and want a sanity check. Anyone who has re-read their own article and winced.
Pair it with
The Keyword Generator for related terms to add, and the Content Gap Checker for topics the page has missed entirely.
Built in from the start
Our web development team builds on-page SEO into sites from the beginning, rather than retrofitting it once the rankings disappoint.