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Keyword Density Checker

Calculate keyword frequency and density percentage in any text.

Best for: Use it to check you cover a topic without over-stuffing a keyword.

Complete guide

Input

How it's calculated & sources
The Keyword Density Checker uses the standard method for this calculation. It runs entirely in your browser, so your inputs are never uploaded. Last reviewed June 2026.

Free & no sign-up · runs entirely in your browser. Results are estimates for general information, not professional advice — verify important decisions with a qualified expert. Last reviewed June 2026.

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Complete guide

Quick answers

Short, sourced answers to the questions people (and AI assistants) ask most.

What is Keyword Density?
A keyword density checker counts how often words and phrases appear in your text and their percentage of the total.
Why does Keyword Density matter?
Which terms dominate your copy. There is no magic target density - modern SEO rewards natural, relevant writing, not repetition.
How is Keyword Density calculated?
It tokenises the text, counts terms and n-grams, and reports frequency and density, in your browser.
What are common keyword density mistakes?
Chasing a specific density - keyword stuffing can hurt rankings.
When should you use the Keyword Density Checker?
Use it to check you cover a topic without over-stuffing a keyword.

What is the Keyword Density Checker?

A keyword density checker counts how often words and phrases appear in your text and their percentage of the total.

How the Keyword Density Checker works

It tokenises the text, counts terms and n-grams, and reports frequency and density, in your browser.

Common mistakes to avoid

  • Chasing a specific density - keyword stuffing can hurt rankings.
  • Ignoring synonyms and related terms search engines understand.
  • Counting stop words that add noise.

Keywords: keyword, density, seo, frequency.

Sources: Google Search Central

Reviewed by the Free Tools Galaxy editorial team · Updated June 2026 · Calculated privately in your browser.

Frequently asked questions

Is the Keyword Density Checker free to use?+

Yes. Every tool on Free Tools Galaxy is 100% free, runs in your browser and requires no signup.

How accurate is the Keyword Density Checker?+

Keyword Density Checker uses the standard keyword density checker formula in double-precision arithmetic, so the same inputs always produce the same result and you can verify any figure by hand. It is an educational estimate — real-world outcomes depend on your actual rates, rules and assumptions.

Do you store my inputs?+

No. The Keyword Density Checker runs entirely in your browser. Nothing is uploaded or saved to a server.

Can I use the Keyword Density Checker on mobile?+

Yes — the interface is fully responsive and works on phones, tablets and desktops.

What are common mistakes to avoid?+

The most frequent mistake is mixing units. Double-check your inputs use a single, consistent unit before clicking Calculate.

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Reddit post
Title: I built/used this free keyword density checker — instant, no signup

Body: Calculate keyword frequency and density percentage in any text. Try it: https://freetoolsgalaxy.com/tools/keyword-density-checker
LinkedIn post
Keyword Density Checker on Free Tools Galaxy — Calculate keyword frequency and density percentage in any text. https://freetoolsgalaxy.com/tools/keyword-density-checker
Medium intro
# Keyword Density Checker — the free tool I keep coming back to

Calculate keyword frequency and density percentage in any text.

Try it: https://freetoolsgalaxy.com/tools/keyword-density-checker
Quora answer
The fastest way is to use a free in-browser keyword density checker: https://freetoolsgalaxy.com/tools/keyword-density-checker. Calculate keyword frequency and density percentage in any text.

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Free embed code for blogs, docs and dashboards. Every embed sends a backlink home — helping you and the galaxy grow together.

HTML iframe
Drop into any site — auto-resizes to its content height, theme-aware.
<iframe src="https://freetoolsgalaxy.com/tools/keyword-density-checker?embed=1" title="Keyword Density Checker" loading="lazy"
  style="width:100%;height:600px;border:0;border-radius:16px;background:#0b1020"
  allow="clipboard-write"></iframe>
<script>window.addEventListener("message",function(e){if(e.data&&e.data.type==="ftg-embed-height"){document.querySelectorAll("iframe").forEach(function(f){if(f.contentWindow===e.source){f.style.height=e.data.height+"px";}});}});</script>
<p><a href="https://freetoolsgalaxy.com/tools/keyword-density-checker" target="_blank" rel="noopener">Powered by Keyword Density Checker on Free Tools Galaxy</a></p>
Responsive wrapper
Aspect-locked container — good for blog post bodies.
<div style="position:relative;padding-bottom:75%;height:0;overflow:hidden;border-radius:16px">
  <iframe src="https://freetoolsgalaxy.com/tools/keyword-density-checker?embed=1" title="Keyword Density Checker" loading="lazy"
    style="position:absolute;inset:0;width:100%;height:100%;border:0" allow="clipboard-write"></iframe>
</div>
WordPress / Markdown
Paste in a custom-HTML block or markdown file.
[Keyword Density Checker — free online tool](https://freetoolsgalaxy.com/tools/keyword-density-checker)

<iframe src="https://freetoolsgalaxy.com/tools/keyword-density-checker?embed=1" width="100%" height="600" frameborder="0"></iframe>
Text link-back
Minimal credit link — best for sidebars and footers.
<a href="https://freetoolsgalaxy.com/tools/keyword-density-checker" target="_blank" rel="noopener">Try the free Keyword Density Checker</a>

Share-to-Grow Kit

Pre-written, ready-to-paste posts for every major channel. Help others discover this tool — and earn backlinks.

Title
I built a free watermark adder that works instantly in the browser — no signup, no ads in your face
Body
Hey r/[subreddit],

I kept needing a quick watermark adder and most options online were slow or behind paywalls, so I built one that:

• Runs 100% in your browser (your data never leaves your device)
• No signup, no email wall, no popups
• Loads in under a second on mobile

It covers the standard watermark adder use cases (watermark, brand, image) and links out to the formula + worked examples if you want to learn the math.

Link: https://freetoolsgalaxy.com/tools/watermark-adder

Happy to take feedback — what's missing?
Post to a relevant subreddit (e.g. r/InternetIsBeautiful, r/webdev, r/productivity). Avoid spammy subs.
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