Character Frequency Counter
See exactly how many times each character appears in your text — great for cryptography, linguistics, and data analysis.
Frequently Asked Questions
About this calculator
See how many times each character appears in your text, with percentages. Letters-only mode ignores digits, spaces and punctuation. The count is useful in cryptography, linguistics and data checks.
In English the most frequent letters are E, T, A, O, I and N, so the frequency table is a first step in breaking simple substitution ciphers.
How to use it
- Paste your text.
- Tick Letters only if needed.
- Press Analyze Frequency.
Method
Each character is counted and shown with count ÷ total × 100. In English text E is about 12.7%, T about 9.1% and A about 8.2% of letters.
Worked example
Hello world
| l | 3 |
| o | 2 |
| h, e, w, r, d | 1 each |
Tips and common mistakes
- Compare the table with English norms to spot a substitution cipher.
- Include spaces to analyse word length patterns.
- Case is merged in letters-only mode.
- Check for unexpected characters in data cleaning.
- Use it with Morse or binary text to confirm symbol counts.
Frequently asked questions
What is character frequency?
How often each character occurs in a text.
Which letter is most common in English?
E.
Can I use it for cryptography?
Yes, it is the first step in frequency analysis.
Does it count spaces?
Yes, unless letters-only is ticked.
Is it case-sensitive?
Letters are merged by default.
Can I use Morse code with it?
Yes, to count dots and dashes.