Character Frequency Counter | Analyze Letter & Symbol Occurrence
Analyze character frequency in any text. See how often each letter, number, or symbol appears with detailed statistics. Perfect for cryptography, text analysis, and pattern recognition.
How to Use This Tool
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Paste or type your text into the input field.
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View real-time character frequency analysis.
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Characters are sorted by frequency (most common first).
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Toggle case-sensitive mode if needed.
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Copy or download the frequency distribution results.
Use Cases & Examples
Cryptography & Cipher Breaking
Analyze encrypted text for frequency patterns to break substitution ciphers and codes.
Linguistics & Language Research
Study letter frequency distribution across different languages and writing systems.
Data Analysis & Pattern Recognition
Identify character patterns in datasets, logs, or encoded information.
Password Strength Analysis
Check for repeated characters that may weaken password security.
Text Forensics
Detect authorship patterns or anomalies based on character usage habits.
How Character Frequency Analysis Works
Each character in the input text is processed individually using Unicode code points.
A hash map counts occurrences of each character with O(n) time complexity.
Results are sorted by frequency (descending) with alphabetical ordering for ties.
Case normalization (optional) converts all letters to lowercase before counting.
All Unicode characters including emojis and special symbols are supported.
Frequently Asked Questions
Q.Does it distinguish between uppercase and lowercase?
A. By default, it's case-insensitive (treating 'A' and 'a' as the same). You can enable case-sensitive mode to distinguish them.
Q.Does it count spaces and punctuation?
A. Yes—every character including spaces, punctuation, and special symbols is counted and displayed in the frequency table.
Q.What character sets are supported?
A. All Unicode characters are supported, including emojis, CJK characters, and special symbols from any language.
Q.Can I use this for cryptography analysis?
A. Yes—character frequency analysis is a fundamental technique in cryptography for breaking substitution ciphers and analyzing encrypted text.
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