Freq

Letter & Character Frequency

LOCAL · Browser-Only

Analyze the frequency of each letter and character in your text

Enter text to analyze

Start typing or paste text above to see a full analysis of your text - character frequency, word stats, reading time, and more.

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What is Letter & Character Frequency?

Free online letter & character frequency to analyze how often every letter and character appears in your text.

See a breakdown sorted by frequency with percentages and a visual bar chart, and toggle case-sensitive or case-insensitive counting. Useful for cracking a substitution cipher with frequency analysis, linguistics and Scrabble research, checking the letter distribution of a password, or counting how many times a specific character appears in a string. Compare your text against the standard English letter frequency where E, T, and A lead the list. All analysis runs in your browser, so your text stays private. No signup required.

How to Use Letter & Character Frequency

1Paste or type your text into the input area
2View the character frequency table sorted by most common
3Toggle case sensitivity and character type filters
4See the visual bar chart showing character distribution

Frequently Asked Questions

What is letter frequency analysis?

Letter frequency analysis counts how often each letter appears in a text. In English, the most common letter is 'E' (about 13%), followed by 'T', 'A', 'O', 'I', 'N', and 'S'. This analysis is used in cryptography, linguistics, and understanding writing patterns.

Can I analyze characters other than letters?

Yes. The tool counts all characters including letters, numbers, punctuation marks, spaces, and special characters. You can toggle between showing all characters or only letters.

Does it support case-sensitive analysis?

Yes. By default, the analysis is case-insensitive (A and a are counted together). You can switch to case-sensitive mode to count uppercase and lowercase letters separately.

How does frequency analysis help break a cipher?

In a simple substitution cipher each letter is swapped for another, but the underlying frequencies stay the same. By counting which symbols appear most often in the ciphertext and matching them to the most common English letters (E, T, A, O, I, N), you can start guessing the substitutions. Paste the ciphertext here to get that frequency breakdown.

How do I count how many times one specific character appears?

Paste your text and the table lists every character with its exact count, so you can read off how many times a particular letter, digit, or symbol occurs. Sort by frequency or scan for the character you care about.

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Keep reading: Regex Cheat Sheet and cron expressions reference. Doing this in code instead? See the text processing endpoints.