Character Frequency Analyzer
Count how often each character appears in your text and see a sorted frequency table with counts and percentages — useful for cryptography, linguistics and data cleaning.
Input
Options
Output
Statistics
| Metric | Value |
|---|---|
| No data yet | |
Frequency Table
| Character | Count | Percentage |
|---|---|---|
| No data yet | ||
Guides
What does this tool do?
Paste or type any text and get an instant breakdown of every character it contains: how many times each one appears, and what percentage of the text it makes up. Results are sorted from most to least frequent, with a summary of total characters, unique characters and the single most common character.
Who is it for?
- Cryptography students and puzzle solvers performing classic frequency analysis to crack substitution ciphers — English text skews heavily toward E, T, A, O and I, so a letter's rank often reveals what it stands for.
- Linguists and writers studying letter distribution, checking for unusual repetition, or comparing texts across languages.
- Developers and data-cleaning tasks that need to spot stray control characters, inconsistent whitespace or unexpected symbols hiding in a text file.
- Educators teaching probability, entropy or cipher basics with a concrete, visual example.
How to use it
- Type or paste text into the box, or drop a
.txtfile onto the uploader — the frequency table updates live as you type. - Toggle Case sensitive if uppercase and lowercase letters (e.g. "A" and "a") should be counted separately. Off by default, so "A" and "a" are merged.
- Toggle Include whitespace characters to decide whether spaces, tabs and line breaks count toward the totals. Turn it off to analyze only visible characters — handy for cipher work, where spacing is usually stripped before encryption.
- Read the Statistics panel for a quick summary, then scan the Frequency Table for the full breakdown, sorted by count (ties broken alphabetically).
- Copy or download the frequency table as CSV to use in a spreadsheet or another tool.
FAQ
Why does the count differ when I toggle "Case sensitive"? With case sensitivity off (the default), "A" and "a" are folded into a single entry — the count you see is their combined total. Turn it on to see uppercase and lowercase tracked separately.
What happens to spaces, tabs and line breaks? By default they're included and shown as "Space", "Tab" and "Newline" in the table so they stay readable. Uncheck Include whitespace characters to exclude them from both the counts and the percentages — useful when you only care about letters and punctuation.
How are ties broken in the frequency table? Characters with the same count are sorted alphabetically, so results are stable and reproducible for the same input and settings.
Does this work with non-English text or emoji? Yes — the analyzer counts by Unicode code point, so accented letters, non-Latin scripts and most emoji are counted correctly rather than being split into broken fragments.
Privacy
All analysis happens entirely in your browser. Your text is never uploaded or sent to a server.