String Length Calculator
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Characters
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Characters (no space)
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UTF-8 bytes
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UTF-16
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Words
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Lines
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Uppercase
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Lowercase
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Numbers
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Space
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Korean
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Emoji
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Symbols
Last updated: 2026 · Free online tool
What is String Length Calculator?
Free online tool to calculate string length, UTF-8/UTF-16 bytes, lines, and word count
How to Use
- 1 Enter text — Paste or type the text you want to analyze into the input area.
- 2 View real-time statistics — Character count, byte count, line count, and word count are displayed in real-time as you type.
- 3 Detailed analysis — Check counts for uppercase, lowercase, digits, spaces, Korean characters, emojis, and special characters.
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Frequently Asked Questions
UTF-8 uses 1 byte for English characters and 3 bytes for Korean, while UTF-16 uses 2 bytes for most characters. The byte count differs depending on the encoding.
Emojis are counted based on Unicode code points. A single emoji is 1 character, but combined emojis (family, skin tone variants, etc.) may count as multiple characters.
One Korean character is 3 bytes in UTF-8. For example, '가' = 3 bytes (0xEA 0xB0 0x80).
Words are separated by whitespace (spaces, tabs, line breaks). Consecutive whitespace is treated as one separator.
Yes, Korean SMS typically has a 70-character limit, so check the 'character count'. English SMS has a 160-character limit.