Character Frequency Analyzer
Count how often each character appears in text with filtering, sorting, and bar chart display.
Input Text
Show:
Sort:
About This Tool
The Character Frequency Analyzer counts how many times each character appears in your text and displays the results as a bar chart with counts and percentages.
Filter by character type (letters, digits, whitespace, punctuation), sort by frequency or alphabetically, and toggle case sensitivity. All analysis runs instantly in your browser.
How to Use
- Type or paste text into the input area, or click Sample.
- Use the Show dropdown to filter by character type.
- Change the Sort order to find the most or least common characters.
- Toggle Case-sensitive to count uppercase and lowercase letters separately.
Use Cases
Cryptographers analyze ciphertext character frequencies for substitution cipher attacks. Linguists study character distribution across languages. Developers verify generated string distributions. Data engineers inspect character composition for data quality.
FAQ
- Does this support Unicode? β Yes. The tool iterates over characters using JavaScript's Unicode-aware string iteration, so emoji and multi-codepoint characters are handled correctly.
- What counts as punctuation? β Punctuation is everything that is not a letter, digit, or whitespace β including .,!?;:"()& and other symbols.
- Is the percentage relative to all characters or the filtered group? β The percentage is relative to the filtered group. When showing letters only, each percentage is out of the total letter count.
- Is there a size limit? β No hard limit. The tool processes input in-browser and can handle large text blocks efficiently.