Word/Character Frequency Counter

This tool counts how many times each word or character appears in a text and sorts the result by count — something that's practically impossible to tally by hand in a long piece of text.

How to use it

• Choose what to analyze — words or individual characters.
• Paste text and a frequency table appears instantly, sorted from most to least common.
• Handy for instantly spotting the most common word or character in a large block of text.

Common uses

• Finding keywords in an article or document for a basic SEO check without dedicated tools.
• A teaching example of frequency analysis when learning cryptography basics or natural language processing.
• Checking a text for excessive repetition of certain words before publishing.

Things to keep in mind

Frequency analysis is case-sensitive by default in many implementations — "Word" and "word" can count as different entries unless the text is normalized to one case first.

Classical substitution ciphers (ROT13, the Caesar cipher) don't change the frequency distribution of letters, only the mapping — which is exactly why frequency analysis is the classic way to break them without trying every key.