Letter, Vowel, Consonant & Case Frequency
Analyses character composition: count and percentage of uppercase, lowercase, numbers, vowels, consonants, punctuation, and special symbols.
A–Z Letter Frequency Distribution
About this tool
How to use it
- Type or paste any paragraph, cipher, code snippet, or essay into the text box.
- Review character composition metrics instantly, including vowels, consonants, uppercase, lowercase, digits, and symbols.
- Inspect the A-Z letter distribution frequency graph below to see counts and relative percentage shares.
- Use the sort dropdown to toggle between alphabetical order (A to Z) or frequency rank (highest count first).
- Click 'Copy Breakdown' to export the statistical character summary into your clipboard.
Why it matters
Letter and case frequency analysis is essential in cryptography, linguistic studies, typography, and word puzzles like Scrabble and Wordle. Knowing vowel-to-consonant ratios or spotting letter distribution anomalies helps decipher substitution ciphers and assess readability.
When to use it
Use this tool when solving substitution ciphers, analyzing letter frequencies for word games, auditing password complexity, reviewing writing case consistency, or teaching linguistic character distributions.
Good to know
All calculations occur client-side in your web browser. Neither your text nor your frequency statistics are ever transmitted to any remote server.
Common questions
What letters are counted as vowels in this tool?
The vowels counted are standard English vowels: A, E, I, O, and U (both uppercase and lowercase). Y is classified as a consonant under standard orthographic convention.
How is letter frequency calculated?
Letter frequency measures each letter's count relative to the total number of letters (A-Z) in the text, excluding digits, spaces, and punctuation.
Can I use this for solving ciphers?
Yes! In English, the most frequent letters are typically E, T, A, O, I, N, S, H, and R. Comparing cipher character counts against standard English letter frequencies is the basis of classical frequency analysis.
Is my text data stored or shared?
No. The entire analysis runs purely on your device using JavaScript. No data is stored or transmitted.