String Length Calculator
// Calculate string length in chars, bytes, and encodings
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Characters
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JS Code Units
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UTF-8 Bytes
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UTF-16 Bytes
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Words
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Lines
#About String Length Calculator
Free online string length calculator. Get the length of any string in characters, bytes, UTF-8, and UTF-16 encoding units. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
#FAQ
Why are character count and byte count different? ▾
Characters and bytes differ because multi-byte encodings like UTF-8 use more than one byte for non-ASCII characters. For example, an emoji might be 1 character but 4 bytes in UTF-8.
</> Embed this tool ▾
Copy this code to embed the tool on your website. Adjust the height to fit your layout.
<iframe src="https://www.browserutils.dev/embed/string-length-calculator" width="100%" height="500" frameborder="0" title="String Length Calculator"></iframe>