Okay, let’s be honest. The whole SEO game has become a bit of a maze, right? You write a blog. You think it’s good. You even added your keywords. But then, boom—Google decides it doesn’t care. So what now?
That’s where stuff like a keyword density tool actually becomes useful. And I’m not talking about spamming a keyword 15 times just to rank. This isn’t 2010. But knowing whether your content’s keyword usage looks natural to a search engine? Still matters. Still overlooked. Still makes a difference.
So we added our Keyword Density Checker to ToolsBox. No fluff. Just straight-up keyword count, percentage, and how you’ve distributed them.
Honestly? Balance.
You don’t want to overdo it and look like a keyword stuffer. But you also don’t want to use your focus keyword once and hope for the best. This tool shows you what’s really going on behind the scenes. Whether it’s for blog posts, product pages, landing pages, or even just a LinkedIn article you spent way too long writing.
You're probably wondering—why not just CTRL+F the keyword and count manually? You could. Sure. But what about partial matches? Or keywords buried inside subheadings, anchor text, or alt tags? That’s where it gets messy. This tool sorts it all. Fast.
This isn’t just for keyword-obsessed SEO consultants. If you’re a content writer, blogger, even a copywriter—this thing’s handy. You paste your content. Boom—get a rundown of the most used words, how often they appear, and their density in percentages.
Plus, if you’re optimizing for secondary keywords (you should be), this gives you a quick way to check if they’re being underused or maybe just overkill.
Let’s say you’re targeting something like:
on-page SEO
SEO writing tools
keyword analysis
content optimization
best keyword checker online
Instead of trying to count and check all these manually, just drop the content into the checker. Done. It spots all of them and shows how you’re doing.
Here’s what you’ll see when you use our keyword density tool:
Total Word Count – self-explanatory.
Number of Unique Words – helpful for seeing how varied your writing is.
Most Frequent Keywords – 1-word, 2-word, 3-word combos.
Density Percentage – shows how much each word or phrase takes up in your content.
Highlight Feature – yeah, it even highlights the keywords right inside the content if you want.
It’s free. No account nonsense. No pop-ups yelling at you to upgrade. Just paste and go.
People like putting weird use cases for tools like this. We’re not gonna do that. Here's when this tool actually helps:
You're proofreading an SEO blog before publishing.
You’re optimizing product descriptions without making them sound robotic.
You're repurposing old content and want to hit new target terms.
You just want to double-check your freelance writer didn’t go overboard.
You’re doing competitor research. Yep—you can paste their content here too.
Here’s something folks rarely say: keyword density shouldn’t be perfect. If you’re at 2.5%, that’s fine. If you’re at 0.8%, that might be fine too, depending on how long your piece is. Search engines don’t rank content based on perfect formulas. They want usefulness, structure, and relevance.
But having an overview of how your keywords sit in your content? It keeps your writing intentional.
We’re not scraping your stuff, storing it, or selling it to sketchy ad agencies. That content you paste? It never gets saved. It’s processed on the spot. Once you close the tab—it’s gone.
Not gonna pretend it’s magic. But it’s clean, accurate, and annoyingly simple to use. You don’t need to create an account, verify your email, or jump through loops. We’ve also stripped it down to just what you need—no bloated extras.
And it plays well with other tools we offer, like the Plagiarism Checker, Readability Checker, or even our Grammar Checker if you’re editing in bulk.
Look—no one wants to check keyword density. It’s a bit dry. But every time you do it, especially on longer pieces, you catch something. Either a keyword that’s way overused. Or one you thought you added, but didn’t.
It’s kind of like spellcheck. You never open it excited, but it usually saves you some embarrassment.
So yeah. Give it a shot.
How much keyword density is too much?
Usually anything over 3% for one keyword feels a bit unnatural. But there’s no perfect number. Just try reading the content out loud—if it sounds forced, it probably is.
Can this tool help with LSI keywords?
Not directly. It shows you what’s repeated, but for LSI (semantic keywords), you’ll need to cross-reference them yourself.
Is keyword density still relevant in 2025?
Not like it used to be. But yes—it’s still part of the puzzle. Especially when writing for search engines and humans.
Does it check for hidden text or alt tags?
If you paste in full HTML, it can catch those. Otherwise, it's just what’s visible in the text you paste.
Do I need to install anything?
Nope. It runs straight from the browser. No installs. No plugins. No nonsense.