Character Frequency Analyzer
Count character, letter and word frequencies for text analysis
Text
About
Analyze the character, letter, and word composition of a text. Shows summary counts (characters, words, lines, letters, digits, whitespace), the most frequent characters, and an a–z letter frequency breakdown useful for cryptography and linguistics. Everything runs in your browser; nothing is uploaded.
About this tool
Analyze character and letter frequencies, word count, line count and stats. A–z letter frequency for crypto analysis. Free, client-side, no signup. Character Frequency Analyzer runs in the browser on DevTools. There is no signup, and your input stays on this device unless the tool explicitly performs a live network lookup.
What this tool does not do
- Character Frequency Analyzer is a free in-browser utility, not a hosted API. It does not keep server-side history and is not a substitute for production verification in your own stack.
How do I use this tool?
How do I use Character Frequency Analyzer?
Open Character Frequency Analyzer, enter or paste your input, and copy the result. The page works without an account.
Related guides
Caesar Ciphers, ROT13, and Why Neither Is Encryption
What a shift cipher is, why ROT13 is self-inverse and useful for light obfuscation, and how frequency analysis breaks even large keys efficiently.
Letter Frequency Analysis: How Frequency Stats Crack Substitution Ciphers
What the letter distribution in English looks like, how to use it to break a Caesar cipher, and what word and line stats reveal that individual letters miss.
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