How to use: Character Frequency Analyzer
Character Frequency Analyzer is a free online Text Tools tool that count characters, words, line lengths or n-grams and compute Shannon entropy instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.
Use Character Frequency Analyzer now →
Description
Count characters, words, line lengths or n-grams and compute Shannon entropy.
- Text Tools
- Because everything is computed client-side, Character Frequency Analyzer is safe to use with sensitive data such as API keys, tokens or private logs.
How to use
Using Character Frequency Analyzer takes three steps:
- Paste your data into the input box (or load the example).
- Configure the options to match your target format or scenario.
- Copy, download or inspect the output — it updates live as you type.
Run
Examples
A pangram: every letter appears, so the entropy is close to the maximum for English text.
Input
the quick brown fox jumps over the lazy dog
Output
43 characters, 27 distinct Top 27: ␣ U+0020 8 18.60% ████████████████████████ o U+006F 4 9.30% ████████████ e U+0065 3 6.98% █████████ h U+0068 2 4.65% ██████ r U+0072 2 4.65% ██████ t U+0074 2 4.65% ██████ u U+0075 2 4.65% ██████ a U+0061 1 2.33% ███ b U+0062 1 2.33% ███ c U+0063 1 2.33% ███ d U+0064 1 2.33% ███ f U+0066 1 2.33% ███ g U+0067 1 2.33% ███ i U+0069 1 2.33% ███ j U+006A 1 2.33% ███ k U+006B 1 2.33% ███ l U+006C 1 2.33% ███ m U+006D 1 2.33% ███ n U+006E 1 2.33% ███ p U+0070 1 2.33% ███ q U+0071 1 2.33% ███ s U+0073 1 2.33% ███ v U+0076 1 2.33% ███ w U+0077 1 2.33% ███ x U+0078 1 2.33% ███ y U+0079 1 2.33% ███ z U+007A 1 2.33% ███ Shannon entropy: 4.3855 bits/character (8.0 would mean perfectly random bytes; English prose is typically 4.0–4.5)
This output was produced by actually running the tool, not written by hand.
Use cases
Common situations where Character Frequency Analyzer helps:
- Count characters, words, line lengths or n-grams and compute Shannon entropy.
Parameters
| key | Options | type | allowed | default | Character Frequency Analyzer |
|---|---|---|---|---|---|
mode | Report | select | char (Per character), word (Per word), line (Per line length), ngram (Character n-grams) | — | char |
n | n-gram size | number | — | 2 | — |
top | Show top N | number | — | 40 | 40 |
Input: text · Output: text · live update while typing: ✓
FAQ
What is Character Frequency Analyzer?
Character Frequency Analyzer count characters, words, line lengths or n-grams and compute Shannon entropy. It runs entirely in your browser, so your data stays private.
Is Character Frequency Analyzer free to use?
Yes. Character Frequency Analyzer is free, unlimited and works without registration or installation.
Does my data get uploaded?
No. All processing happens locally in your browser; nothing is sent to any server.
Good to know
- Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.