Word & Keyword Frequency Counter
Count word occurrences and keyword frequency in any text to check repetition, word density, and SEO optimization.
3× (33.3%) the 1× (11.1%) quick 1× (11.1%) brown 1× (11.1%) fox 1× (11.1%) lazy 1× (11.1%) dog 1× (11.1%) end
🔒 Private by design. This tool runs entirely in your browser — the values you enter never leave your device.
Paste your text to calculate word frequency and SEO keyword density instantly. Shows total words, unique words, and a ranked breakdown with percentage density for each word. Runs 100% privately in your browser.
Formula / method
Examples
3× (33.3%) the
top words & percentages listed
What the counter measures
This tool scans your text, splits it into individual words, and tallies how many times each one appears. It normalises case so that 'The' and 'the' are counted as the same word, and it strips surrounding punctuation so 'end.' and 'end' are not treated as two different entries. The result is usually sorted from most frequent to least frequent, giving you an instant picture of which terms dominate a piece of writing.
Everything runs in your browser, so even long documents stay private on your device. For a plain total of words or characters rather than a per-word breakdown, pair this with the Word Count tool.
When it is useful
Writers and editors use frequency counts to catch overused filler words or repeated phrasing that makes prose feel monotonous. Students and researchers use it to summarise the key themes of a passage, and content creators use it to gauge keyword density before publishing an SEO article.
A common mistake is reading raw counts as importance. Very common function words like 'the', 'and' and 'of' will almost always top the list without telling you anything meaningful, so focus on the frequent content words and consider ignoring short stop words when you interpret the results.
Where it's used
- Finding the most-used words in an essay to catch repetition
- Checking keyword density in an article for SEO
- Analysing open-text survey answers for recurring themes
- Spotting filler or crutch words in a speech or blog draft
- Getting a quick sense of what a body of text is mostly about
Real-world examples
- A blogger runs a 1,200-word post and sees 'basically' appears 14 times, then trims it.
- An SEO writer confirms the target keyword shows up a natural number of times rather than stuffed.
- A researcher pastes 200 survey comments and finds 'price' and 'slow' top the frequency list.
A bit of history
The pattern that a handful of words dominate any text is described by Zipf's law, named after American linguist George Kingsley Zipf (1902–1950), who observed that a word's frequency is roughly inversely proportional to its rank.
Did you know?
In typical English text the single word 'the' accounts for roughly 6–7% of all words — a vivid, everyday example of Zipf's law in action.
FAQ
Can I use this as an SEO keyword frequency and density counter?
Yes! Pasting your article or blog post calculates the exact occurrence count and density percentage for every word. For standard on-page SEO, keeping your primary keyword frequency around 1% to 2.5% helps prevent keyword stuffing penalties while signaling relevance to search engines.
How are words defined and separated?
A word is a sequence of alphanumeric characters and apostrophes. Punctuation marks and spaces are treated as boundaries, and counting is case-insensitive so "The" and "the" are counted together.
How does keyword density calculation work?
Keyword density is calculated with the formula: (Keyword Count ÷ Total Words) × 100. Our tool automatically displays this percentage next to each word in the frequency list.
Is my text sent to any server?
No. All word frequency counting and text analysis is performed 100% locally in your web browser. Your text never leaves your device.