Character Frequency
Analyze character and word frequency in text
100% free. Runs entirely in your browser - your files and data never leave your device and nothing is uploaded to any server.
Enter some text on the left to see frequency analysis.
About this tool
Counting how often each character and word appears sounds academic until you see what it reveals. English letter frequency is remarkably stable - E, T, A, O, I and N dominate any substantial English text, in roughly that order, which is the foundation of classical cryptanalysis and the reason a simple substitution cipher falls apart quickly. It is also why Scrabble tile distributions and Wheel of Fortune's letter values look the way they do. Word frequency is more immediately practical for writers: it exposes the crutch words you lean on without noticing. Almost everyone has a handful - "just", "really", "actually", "very" - and seeing one appear forty times in an article is more persuasive than any style advice. The counts also surface accidental repetition of a distinctive word within a few paragraphs, which reads as carelessness even when nobody can say why. Analysis runs in your browser.
How to use this tool
- Paste your textAn article, chapter or any block of writing. Longer samples give more meaningful frequency data.
- Read the word frequencies firstThese are the actionable ones. Ignore the inevitable "the" and "and" at the top and look further down.
- Look for your crutch wordsAnything distinctive appearing far more than you would expect is worth editing.
- Check character distribution if relevantUseful for puzzle design, cipher work and linguistic comparison rather than for editing prose.
Key features
- Exposes overused words that reading alone will not reveal.
- Character-level counts for cryptography, puzzle design and linguistic analysis.
- Runs in your browser, so drafts and unpublished work are never uploaded.
- No length limit and no account.
- Instant results on any size of text.
Common uses
- Editing a draft to remove repeated crutch words.
- Checking letter distribution when designing a word game or puzzle.
- Comparing the vocabulary of two pieces of writing.
- Teaching letter frequency in cryptography or linguistics.
- Analysing whether an article genuinely covers its topic or just repeats one phrase.
Tips for better results
- Skip the top of the word list. Function words like "the" and "of" always dominate and tell you nothing about your writing.
- Look for distinctive words appearing more than a handful of times - that is where the editing opportunity is.
- Use a substantial sample for character frequency. A short paragraph will not match expected English distribution.
- Compare a draft against a piece you consider well written to see where your habits differ.
- For SEO-oriented analysis of a page rather than style, the Keyword Density Checker frames the same data around search terms.
Mistakes to avoid
- Treating high frequency as automatically bad. An article about invoices will say "invoice" often, and that is correct.
- Drawing conclusions about letter distribution from too small a sample.
- Removing every repetition mechanically, which produces stilted prose full of awkward synonyms.
- Analysing a whole page including navigation and footer, so site-wide terms swamp the actual content.
- Assuming word frequency measures quality. It measures habit, which is a different thing.
Frequently asked questions
Paste your text above. Character counts and word counts are calculated immediately, ordered by how often each appears.
Yes. No account, no length limit, and nothing is uploaded.
Two main things. For writers, spotting crutch words you repeat without noticing - the single most useful self-editing signal there is. For puzzle design and cryptography, letter distribution, which underpins both Scrabble tile values and classical cipher breaking.
E, T, A, O, I and N, roughly in that order, across any substantial English text. That stability is exactly what makes simple substitution ciphers breakable by frequency analysis alone.
Characters are counted as they appear, so review the output if capitalisation matters for your analysis. For style editing it rarely does; for cipher work it can.
No. Everything is analysed in your browser, so unpublished drafts stay on your device.
Yes. Character Frequency is free for normal use with no account required, and ToolBox does not add a watermark to your result.
Most tools in this category run in your browser so the file stays on your device. If a tool needs a temporary server job, files are handled for that job only and are not kept as a lasting archive.
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