Letter Frequency Counter
Analyze character distribution in text with visual frequency charts. Perfect for cryptanalysis, language analysis, and text pattern recognition.
Visual Charts
Beautiful bar charts show letter distribution at a glance.
Flexible Options
Toggle case sensitivity and sort by frequency or alphabetically.
Export Results
Download results as CSV or JSON for further analysis.
Use Cases
Cryptanalysis
Break substitution ciphers by analyzing letter frequency patterns. In English, E is the most common letter, followed by T, A, O, I, N, S, H, R.
Language Analysis
Study language patterns and compare letter frequencies across different languages or writing styles.
Text Pattern Recognition
Identify unusual patterns in text, detect language, or verify if text matches expected letter distribution.
Educational
Learn about frequency analysis, statistics, and how letter distribution varies across different texts.
Frequently Asked Questions
What is letter frequency analysis?
Letter frequency analysis is the study of how often each letter appears in a text. It's commonly used in cryptanalysis, linguistics, and text pattern recognition to analyze language patterns and break simple ciphers.
How do I use this letter frequency counter?
Simply paste or type your text into the input area. The tool will automatically count the frequency of each letter (A-Z) and display the results as percentages with visual bar charts. You can toggle case-sensitivity and sort by frequency or alphabetically.
Can I export the results?
Yes! You can export the letter frequency data in both CSV and JSON formats. CSV is ideal for spreadsheet analysis, while JSON is perfect for programming and data processing applications.
What is this tool useful for?
This tool is perfect for cryptanalysis (breaking substitution ciphers), language analysis, text pattern recognition, educational purposes, and understanding character distribution in any text.
Does case matter in the analysis?
By default, the analysis is case-insensitive (A and a are counted together). However, you can enable case-sensitive mode if you need to distinguish between uppercase and lowercase letters.