Character Frequency Counter
Count character frequency in text for password analysis and cipher detection.
In ordinary English text, the letter e shows up far more often than any other, and a simple substitution cipher that swaps each letter for a different symbol doesn't actually hide that pattern, it just relabels it, which is exactly why counting how often each character appears in a ciphertext is one of the oldest tricks in cryptanalysis for guessing which symbol actually represents e. This tool counts how often every character appears in a block of text, surfacing the same frequency pattern a classical cipher attack would look for.
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Useful for spotting the letter frequency pattern behind a simple substitution cipher, checking whether a password relies on too many repeated characters despite looking long enough, or analyzing character distribution in a piece of text for a cryptography exercise.
Key features
- Clean interface
- Fast processing
- No signup required
- Works offline