UTF-8 Byte Viewer
View UTF-8 byte sequences for any text
UTF-8 Byte Viewer is a free online tool from BrowserUtils that view utf-8 byte sequences for any text. It runs entirely in your browser — your data never leaves your device. No account required.
Enter text above to see its UTF-8 byte breakdown.
How to use UTF-8 Byte Viewer
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About UTF-8 Byte Viewer
Free online UTF-8 encoder and decoder. See the exact byte sequences for any text in UTF-8 encoding, with hex and binary views. 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.
UTF-8 Byte Viewer specs
- Runtime
- 100% client-side (browser)
- Built on
- TextEncoder, TextDecoder, btoa/atob, and encodeURIComponent — all Web Platform APIs
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
What is UTF-8?
UTF-8 is a variable-width character encoding that uses 1 to 4 bytes per character. ASCII characters use 1 byte, while characters like emoji can use up to 4 bytes.
Why is knowing the byte sequence useful?
Understanding UTF-8 byte sequences helps debug encoding issues, calculate string sizes for databases, and work with binary protocols.
How do I fix mojibake (garbled text)?
Mojibake occurs when text is decoded with the wrong encoding. Use this tool to inspect the bytes and determine whether the text was encoded as UTF-8, Latin-1, or another encoding.
How many bytes does an emoji use in UTF-8?
Most emoji use 4 bytes in UTF-8. Some emoji sequences (like flags or skin tone variants) consist of multiple code points joined together and can use 8-28 bytes.
How do I check the byte length of a string in UTF-8?
Paste your text into the tool and it will show the total number of bytes and the byte breakdown for each character. This is useful for checking database column size limits.
What is the difference between UTF-8 and UTF-16?
UTF-8 uses 1-4 bytes per character and is the dominant encoding on the web. UTF-16 uses 2 or 4 bytes per character and is used internally by JavaScript, Java, and Windows.
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