What is the difference between character count and byte count?

Character count is the number of visible characters in the text, while byte count is the storage space occupied under a specific encoding. For example, a Chinese character takes 3 bytes in UTF-8 and 2 bytes in UTF-16. ASCII characters take 1 byte under all encodings.

Why do UTF-8 and UTF-16 byte counts differ?

UTF-8 is a variable-length encoding: English characters take 1 byte, Chinese characters take 3 bytes. UTF-16 uses 2 bytes for most characters in the Basic Multilingual Plane (including common Chinese), and English characters also take 2 bytes. So for pure English text, UTF-8 is more compact; for Chinese text, they are similar.

How is word count calculated?

Word count uses a mixed Chinese-English method: each Chinese character counts as one word, and English words are counted as consecutive alphanumeric strings separated by spaces. This suits common mixed-language scenarios.

What is character frequency analysis used for?

Character frequency analysis helps identify text characteristics and is used for password strength analysis, text encoding detection, data compression evaluation, and linguistic research. High-frequency characters often reflect the language features of the text.

String Length Calculator

Count string length, bytes, lines, words and more — supports multiple encodings

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Character Stats — total characters, characters without spaces
Byte Calculation — supports UTF-8, UTF-16, ASCII encoding
Lines & Words — count lines, words, sentences, paragraphs
Frequency Analysis — shows the top 10 most frequent characters

Use Cases

Database field length limit checks
SMS character count and cost estimation
SEO title and description length optimization
Code text analysis

String Length Calculator

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String Length Calculator Guide

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