Word Frequency Counter

Name: Word Frequency Counter
Author: FastTool

Word Frequency Counter is a free, browser-based writing tool. Analyze word frequency with stop word filter, n-gram analysis, visual charts, and CSV export.

Input for Word Frequency Counter

What this tool does

word frequency analysis
stop words filter
n-gram analysis (1-4 grams)
visual frequency bars
sort by frequency/alpha/length

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In-Depth Guide

A word frequency counter analyses a block of text and returns an ordered list of each distinct word together with its occurrence count and relative frequency. Used correctly, it is the simplest form of text analytics — the building block of keyword research, readability analysis, plagiarism detection, and content optimization. FastTool's counter tokenizes using Unicode word boundaries (UAX #29), normalises case, optionally removes stopwords from language-specific lists, and runs entirely in the browser so that draft articles, client transcripts, and private notes are never uploaded anywhere.

Why This Matters

Writers over-use favorite words without noticing. Editors catching however, therefore, or utilize twelve times per 1000 words is the kind of friction that a frequency count resolves instantly. SEO specialists audit content for target keyword density without paying for a suite. Language learners extract the most common vocabulary from a text they want to read. All of these are tiny problems individually but constant enough to justify a dedicated fast tool.

Real-World Case Studies

Editorial review. A copy editor runs a 3000-word feature article through the counter and spots that interesting appears 14 times, very appears 22 times, and really appears 9 times. A revision pass replaces them with specific adjectives, and the article tightens by 150 words without losing a single idea.
SEO audit. A content strategist checks whether the target keyword machine learning pipeline appears a reasonable number of times in a 2000-word post — not keyword-stuffed, not absent. The counter shows 7 occurrences (0.35%), within the recommended range, and the post ships as-is.
Vocabulary extraction. A language learner reading a Spanish novel feeds the first chapter through the counter (with Spanish stopwords removed), exports the top 200 words, and imports them into Anki. The flashcard deck covers the most common vocabulary of the book before she reads chapter two.

Technical Deep Dive

Word tokenisation is harder than it looks. Unicode Annex #29 defines word boundaries that handle contractions (don't), hyphenated compounds (state-of-the-art), and scripts without spaces (Chinese, Japanese, Thai). The counter uses the Intl.Segmenter API where available (Chrome 87+, Safari 14.1+, Firefox 125+) and a Unicode-aware regex fallback elsewhere. Case normalisation uses String.prototype.toLocaleLowerCase() to handle Turkish dotless-i and other locale-specific pitfalls (İstanbul lowercases to istanbul under tr, but ıstanbul under the default locale). Stopword lists are loaded per language from the same curated sources used by Elasticsearch and Lucene analysers, with an option to disable stopword removal entirely for raw frequency output.

💡 Expert Pro Tip

Run the counter before and after you apply stopwords. The raw counts tell you whether your text is rhythmically imbalanced (too many articles, too many be verbs), and the stopword-removed counts tell you what the text is actually about. Both views matter for different editing decisions.

Methodology, Sources & Accessibility

Last reviewed: April 27, 2026

Methodology

Text processing uses the browser's Unicode-aware JavaScript string APIs, correctly handling grapheme clusters, emoji, right-to-left scripts, and multi-language input. Counting operations (words, characters, sentences) match what editors and CMS systems typically display, using heuristics consistent with widely-accepted publishing conventions. Output preserves your input exactly outside of the intentional transformation — no silent trimming, no automatic case changes, no 'smart' quote replacement unless explicitly requested.

Authoritative Sources

Unicode Technical Report #29 — Text segmentation — word, sentence, and grapheme boundary rules.
Chicago Manual of Style — Widely-used style reference for professional writing and publishing.
Associated Press Stylebook — Standard style reference for journalism and news writing.
W3C Web Standards — The World Wide Web Consortium publishes HTML, CSS, DOM, and accessibility specifications that browser-based tools rely on.
MDN Web Docs — Mozilla's reference documentation for web platform APIs used throughout this tool's implementation.

About This Tool

Word Frequency Counter is a free, browser-based utility in the Writing category. Analyze word frequency with stop word filter, n-gram analysis, visual charts, and CSV export. Standard processing runs on the client — no account is required, and there is no paywall or usage cap. The implementation uses audited standard-library primitives and published specifications rather than proprietary algorithms, so the output is reproducible and transparent.

Accessibility

FastTool targets WCAG 2.2 Level AA conformance: keyboard-navigable controls, visible focus states, semantic HTML, sufficient colour contrast, and screen-reader compatibility. If you encounter an accessibility issue, please reach us via the site footer.

Designed for writing, editing, and content creation, Word Frequency Counter helps you analyze word frequency with stop word filter, n-gram analysis, visual charts, and CSV export without any setup or installation. Every piece of writing benefits from careful editing and formatting, and dedicated tools help you polish your work to professional standards. Standard processing runs locally in your browser, so tool input stays on your device where browser APIs support local processing. You can review page requests in the Network tab of your browser developer tools. Built-in capabilities such as word frequency analysis, stop words filter, and n-gram analysis (1-4 grams) make it a practical choice for both beginners and experienced users. Most users complete their task in under 30 seconds. Word Frequency Counter is optimized for the most common writing scenarios while still offering enough flexibility for advanced needs. The workflow is simple — provide your data, let Word Frequency Counter process it, and copy, edit, or download the output in one click. Save this page and Word Frequency Counter is always ready when you need it — today, tomorrow, and for every future task.

You might also like our Palindrome Checker. Check out our Markdown Table Generator. For related tasks, try our Character Counter.

Key Features of Word Frequency Counter

word frequency analysis included out of the box, ready to use with no extra configuration
Filtering options to narrow results based on your criteria
n-gram analysis (1-4 grams) — a purpose-built capability for writing professionals
Full visual frequency bars support so you can work without switching to another tool
Sorting and ordering tools that arrange data alphabetically, numerically, or by custom rules
CSV import and export for seamless integration with spreadsheet applications
Filtering options to narrow results based on your criteria
case sensitive option — a purpose-built capability for writing professionals
Completely free to use with no registration, no account, and no usage limits
Runs in your browser for standard workflows, with no account or upload queue required
Responsive design that works on desktops, tablets, and mobile phones

What Sets Word Frequency Counter Apart

Full-featured and completely free — every capability of Word Frequency Counter, including word frequency analysis, stop words filter, is available to every user without any cost, usage limits, or premium tiers. Unlike many competing tools that restrict advanced features behind paywalls, Word Frequency Counter gives you unrestricted access to everything.
Works on every device — the responsive design ensures Word Frequency Counter performs identically on desktops, laptops, tablets, and smartphones. Whether you are at your workstation or using your phone during a commute, the tool adapts to your screen and delivers the same quality results.
Instant results without network latency — because all processing happens locally in your browser, results appear immediately after you click the action button. There is no waiting for server responses, no progress bars, and no risk of timeout errors during heavy usage periods.
Available in 21 languages — Word Frequency Counter supports a wide range of languages with instant switching and no page reload. Whether your team works in English, Spanish, Arabic, Japanese, or any of 18 other supported languages, everyone gets the same fully translated experience.

Getting Started with Word Frequency Counter

Visit the Word Frequency Counter tool page. It works on any device and requires no downloads or sign-ups.
Fill in the input section: type or paste your text. Use the word frequency analysis capability if you need help getting started. The interface is self-explanatory, so you can begin without reading a manual.
Fine-tune your output using options like stop words filter and n-gram analysis (1-4 grams). These controls let you customize the result for your specific scenario.
Press the action button and your result appears immediately. All computation happens in your browser, so there is zero latency.
Review your result carefully. Word Frequency Counter displays the output clearly so you can verify it meets your expectations before using it elsewhere.
Use the copy button to save your result to the clipboard, or copy, edit, or download the output. The copy feature works with a single click and includes the complete, formatted output.
Process additional inputs by simply clearing the fields and starting over. Word Frequency Counter does not store previous inputs or outputs, so each use starts fresh and private.

Get More from Word Frequency Counter

Track reading time alongside word count. For digital content, a 7-10 minute read is the engagement sweet spot on mobile; longer pieces need stronger hooks to retain attention.
Keep a personal style guide and check your output against it. Consistency in terminology, tone, and formatting builds reader trust over time.
Read your text aloud before and after using the tool. Hearing your words helps catch awkward phrasing and flow issues that metrics alone cannot detect.

Typical Mistakes with Word Frequency Counter

Treating Word Frequency Counter output as a substitute for editing. Structural feedback is useful, but voice, rhythm, and argument quality still require a human editor's ear.
Ignoring audience vocabulary. A piece written at the wrong reading level for its audience underperforms no matter how polished — match Grade 8 for general audiences, Grade 12 for specialists.
Skipping the read-aloud pass. Awkward phrasing, run-on sentences, and homophone confusions (their/there/they're) consistently survive automated checks but fail a vocal read.
Forgetting attribution and citation. 2026 AI detection tools flag unsourced claims; always cite the original research or data source, even for widely-known facts.
Editing as you write. Separate the drafting and revision phases — running any writing tool in the middle of a creative flow fragments focus and weakens both steps.

Word Frequency Counter — Input and Output

Counting word frequencies in text

Input

the cat sat on the mat the cat

→

Output

the: 3 cat: 2 sat: 1 on: 1 mat: 1

Word frequency analysis counts occurrences of each word. Results are sorted by frequency, highest first.

Analyzing keyword density

Input

This free tool is a free online tool for free use.

→

Output

free: 3 (27.3%) tool: 2 (18.2%) ...

Keyword density is the percentage each word occupies. High density for a keyword may signal keyword stuffing to search engines.

How Word Frequency Counter Compares

Feature	Browser-Based (FastTool)	Word Processor	SaaS Writing Tool
Cost	Free, no limits	Plugin marketplace (varies)	Free tier + paid plans
Privacy	Browser-local standard processing	Local file storage	Text sent to servers
Setup Time	0 seconds	Editor + plugin install	Account creation
Features	Focused single-purpose	Integrated in editor	Full writing suite
Cross-Platform	Works everywhere	Editor-dependent	Browser-based but login
Offline Use	After initial page load	Full offline support	Requires internet

When a Different Tool Is Better

No tool is perfect for every scenario. Here are situations where a different approach will serve you better:

When collaborating with editors in real time. Google Docs, Notion, and similar document editors support live co-editing and comment threads that browser utilities do not.
When preparing academic or technical manuscripts. LaTeX, reference managers, and citation tools are essential for scholarly writing with formal bibliography requirements.
When you need native-level translation. Machine translation for casual content works; publication-grade localization requires a professional human translator with domain expertise.

Understanding Word Frequency Analysis

Word frequency analysis is one of the foundational techniques in computational linguistics and text mining. George Kingsley Zipf formalized the observation (now called Zipf's Law) that in any natural language corpus, the frequency of a word is inversely proportional to its rank: the most common word occurs approximately twice as often as the second most common, three times as often as the third, and so on. In English, 'the' accounts for about 7% of all words, and the top 100 words cover roughly 50% of any text. This distribution holds across languages, time periods, and genres — a remarkably universal linguistic property.

Practical word frequency analysis involves several preprocessing decisions that significantly affect results. Should 'running' and 'runs' be counted as the same word? (Lemmatization says yes, reducing words to their base form.) Should common words like 'the,' 'is,' and 'of' be removed? (Stop word filtering says yes for topic analysis, no for stylometric analysis where function word patterns identify authors.) Should hyphenated words count as one or two? Should contractions be expanded? N-gram analysis (counting multi-word phrases) often reveals more meaningful patterns than single-word frequency — 'machine learning,' 'United States,' and 'New York' are more informative as phrases than as individual words. TF-IDF weighting, which penalizes words common across many documents, highlights terms that are distinctively important in a specific text.

How Word Frequency Counter Works

Under the hood, Word Frequency Counter uses modern JavaScript to analyze word frequency with stop word filter, n-gram analysis, visual charts, and CSV export with capabilities including word frequency analysis, stop words filter, n-gram analysis (1-4 grams). The implementation follows web standards and best practices, using the DOM API for rendering, the Clipboard API for copy operations, and the Blob API for downloads. Processing is optimized for the browser environment, with results appearing in milliseconds for typical inputs. No server calls are made during operation — the tool is entirely self-contained.

Things You Might Not Know

The Oxford English Dictionary contains approximately 273,000 headwords, but the average adult uses only about 20,000-35,000 in daily life.

The passive voice is not inherently wrong — it is useful when the action matters more than the actor. But excessive use can make writing feel impersonal.

Key Concepts

Content Structure: The organization of written content using headings, paragraphs, lists, and sections. Well-structured content improves readability, scanability, and search engine understanding.
Sentence Length: The number of words in a sentence. Varying sentence length improves readability and rhythm, while consistently long sentences can make text difficult to follow.
Character Count: The total number of characters in a text, including or excluding spaces. Character limits are common in social media posts, meta descriptions, and SMS messages.
Passive Voice: A sentence construction where the subject receives the action rather than performing it. While sometimes appropriate, excessive passive voice can weaken writing clarity.

Common Questions

What is word frequency analysis?

In the context of writing, word frequency analysis refers to a fundamental concept that professionals and learners encounter regularly. Word Frequency Counter provides a free, browser-based way to work with word frequency analysis: analyze word frequency with stop word filter, n-gram analysis, visual charts, and csv export.. The tool offers word frequency analysis, stop words filter, n-gram analysis (1-4 grams) and processes standard inputs locally in your browser.

What are stop words?

This is a common question about Word Frequency Counter. Analyze word frequency with stop word filter, n-gram analysis, visual charts, and CSV export. The tool features word frequency analysis, stop words filter, n-gram analysis (1-4 grams) and runs entirely client-side for maximum privacy. It is one of 902 free tools on FastTool, focused on writing, editing, and content creation.

Check out: Lorem Ipsum Generator

What are n-grams?

Can I export results?

After processing your input, Word Frequency Counter lets you copy, edit, or download the output. Results exist only in your browser session — the tool does not save anything remotely. For important outputs, use the copy or download feature before navigating away.

You might also find useful: Word & Character Counter

How to count bigrams?

Word Frequency Counter makes it easy to count bigrams. Open the tool, type or paste your text, configure options such as word frequency analysis, stop words filter, n-gram analysis (1-4 grams), and get your result immediately. Everything is processed client-side in your browser for maximum speed and privacy.

What is Word Frequency Counter and who is it for?

Built for writers, students, and content creators, Word Frequency Counter is a free writing utility on FastTool. Analyze word frequency with stop word filter, n-gram analysis, visual charts, and CSV export. It includes word frequency analysis, stop words filter, n-gram analysis (1-4 grams). It works in any modern browser and requires zero setup. Whether you are a student, a professional, or just someone who needs a quick writing tool, Word Frequency Counter has you covered.

Check out: Character Counter

Can I use Word Frequency Counter on my phone or tablet?

Word Frequency Counter is designed mobile-first. The interface scales to fit phones, tablets, and desktops alike, with touch-friendly controls and appropriately sized text on every screen. Every feature is fully functional regardless of your device or operating system. Whether you are using Safari on an iPhone, Chrome on an Android device, or any other modern mobile browser, the tool delivers the same fast, reliable experience you get on a desktop.

Does Word Frequency Counter work offline?

Yes, after the initial page load. Word Frequency Counter does not need a server to process your data, so going offline will not interrupt your workflow or cause you to lose any work in progress. Just make sure the page is fully loaded before disconnecting — you can tell by checking that all interface elements have appeared. This offline capability is a direct benefit of the client-side architecture that also provides privacy and speed.

You might also find useful: Case Converter

How is Word Frequency Counter different from other writing tools?

Three things set Word Frequency Counter apart: it is free with no limits, it keeps standard processing in the browser, and it works on any device without installation. Most competing tools require accounts, charge for advanced features, or require project uploads for processing. Word Frequency Counter avoids all three of these issues by running everything client-side. Additionally, the interface is available in 21 languages and works offline after the initial page load, which most alternatives do not offer.

What languages does Word Frequency Counter support?

21 languages are supported, covering a diverse range including English, Spanish, French, German, Chinese, Japanese, Korean, Arabic, Hindi, Bengali, Portuguese, Russian, Turkish, Vietnamese, Italian, Thai, Polish, Dutch, Indonesian, and Urdu. The language selector is in the page header, and switching is instant with no page reload required. Your choice persists across sessions via local storage, so the tool remembers your preferred language.

Check out: Text to Speech

Real-World Applications

Social Media Copywriting

Craft social media posts with Word Frequency Counter — check character limits, format text, or generate variations of your copy. The zero-cost, zero-setup nature of Word Frequency Counter makes it ideal for this scenario — you get professional-quality results without committing to a software purchase or subscription.

Professional Documents

Prepare business documents using Word Frequency Counter to ensure your text meets formatting and length requirements. Since there are no usage limits, you can repeat this workflow as many times as needed, experimenting with different inputs and settings until you achieve the exact result you want.

Creative Writing

Fiction writers can use Word Frequency Counter to track word counts, organize chapters, or format manuscripts for submission. The zero-cost, zero-setup nature of Word Frequency Counter makes it ideal for this scenario — you get professional-quality results without committing to a software purchase or subscription.

Newsletter Writing

Use Word Frequency Counter when writing newsletters to check length, format content, and ensure readability before sending. The instant results and copy-to-clipboard functionality make this workflow fast and efficient, letting you move from task to finished output in a matter of seconds.

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References & Further Reading

Authoritative sources and official specifications that back the information on this page.

Word frequency - Wikipedia — Wikipedia
Background on word frequency lists
Zipf's law - Wikipedia — Wikipedia
Statistical law governing word frequencies
COCA - Corpus of Contemporary American English — BYU / English-Corpora
Authoritative English corpus