Letter Frequency Analyzer
Quick Tips
- • This tool runs entirely in your browser - your data stays private.
- • Press Ctrl+V (Cmd+V on Mac) to quickly paste text.
- • Use the Copy button to save your result to clipboard.
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Analyze how often each letter appears in your text.
Examples
Hello World
l: 3 (27.3%) o: 2 (18.2%) h: 1 (9.1%) e: 1 (9.1%) w: 1 (9.1%) r: 1 (9.1%) d: 1 (9.1%)
The quick brown fox
o: 2 (12.5%) t: 1 (6.3%) h: 1 (6.3%) e: 1 (6.3%) q: 1 (6.3%) u: 1 (6.3%) ...
Frequently Asked Questions
E is the most common letter in English, appearing about 12.7% of the time in typical text. The order of frequency is approximately: E, T, A, O, I, N, S, H, R, D, L, C, U, M, W, F, G, Y, P, B, V, K, J, X, Q, Z.
In simple substitution ciphers, each letter is replaced by another. By analyzing which cipher characters appear most frequently and comparing to expected frequencies (E, T, A...), code breakers can guess substitutions. This technique helped break many historical codes.
Scrabble tile values inversely reflect letter frequency. Common letters like E, A, I, O, N, R, T, L, S, U are worth just 1 point. Rare letters like Q and Z are worth 10 points. This balances gameplay since rare letters are harder to use.
Yes, significantly. Spanish has more vowels than English. German uses more umlauted characters. French has heavy E usage. Each language has distinct patterns, which is why frequency analysis can help identify unknown languages.
Letter frequency alone isn't enough for reliable authorship attribution, but combined with other statistical features (word length, sentence patterns, vocabulary) it contributes to stylometry—the quantitative study of writing style used in forensic linguistics.
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