Character Frequency Counter, Rank Every Character by Count

Real-world use cases

• Break a Caesar or substitution cipher by hand

  You have a block of ciphertext and no key. Paste it in, turn off spaces and punctuation so only letters count, and read the ranking. In English the runaway top letter is almost always the encoding of E, followed by T, A, O. Match the top ciphertext rows against e t a o i n and you have your first guesses. The percentage column shows which peaks are sharp enough to trust, and once you spot the shift that turns the top cipher letter into E, the Caesar key falls out.

• Audit which symbols dominate a string or token

  You are designing a slug, a password policy, or a coupon code format and want to know the real character mix of a sample. Paste a few hundred examples, keep punctuation on, and the table shows whether hyphens, underscores, or digits are pulling more weight than you expected. If one separator appears in 30 percent of positions, that is a pattern worth standardizing instead of leaving to chance.

• Check letter distribution for a word game or font test

  Building a Wordle clone, a typing drill, or a pangram check needs you to know how evenly letters are spread. Paste your word list and read the per-letter counts. A spread that leans hard on E and S while Q and Z barely appear tells you the difficulty is uneven. For a font specimen, counting confirms your sample actually exercises every glyph you mean to show off before you ship the page.

• Count a specific character in Chinese or mixed text

  A word counter cannot tell you how many times one Chinese character appears because Chinese has no spaces, but this counter can. Paste an essay, leave counting by code point as is, and search the ranked table for the character you care about. Writers use this to catch a repeated 的 or 了 that makes prose feel flat, and editors use it to measure how heavily a key term leans on a single character.

Common pitfalls

• Leaving spaces counted when doing letter-frequency analysis. In normal prose the space is one of the most frequent characters, so it sits at the top of the ranking and pushes the letters you actually want down a row. Turn off count spaces before reading letter distribution or attacking a cipher.

• Forgetting that case folding is on by default. If you are studying how often a capital letter is used, a folded count merges A into a and hides the answer. Turn on case-sensitive first, otherwise your uppercase and lowercase totals are silently added together.

• Comparing raw counts across texts of different lengths instead of the percentage. The letter e appearing 40 times means very different things in a 200-character note and a 4000-character article. When you compare two texts, read the share column, not the count column, so length does not distort the picture.

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