Character Frequency Counter

The Character Frequency Counter analyses a block of text and tells you exactly how many times each individual character appears.

Paste anything — a paragraph, a password, a cipher, a chunk of code — and it produces a sorted table showing every distinct character, its count, and the percentage it makes up of the whole.

The most common characters rise to the top, each with a small bar so you can see the distribution at a glance.

It counts by Unicode code point, which means accented letters, symbols and even emoji are each treated as a single character rather than being split into surrogate halves.

Two switches let you tailor the analysis: case-insensitive mode merges uppercase and lowercase versions of the same letter, and ignore-whitespace mode drops spaces, tabs and line breaks so you focus on visible content.

Whitespace and control characters are given friendly labels like space, tab and newline so the table is easy to read.

This is handy for letter-frequency analysis in classical cryptography, for spotting unusual or hidden characters in pasted text, for checking the makeup of a passphrase, or simply for curiosity about a piece of writing.

Everything runs locally in your browser with no uploads, so even sensitive text stays private, and it works offline once the page has loaded.