Encoding & Number Bases
UTF-8 Byte Sequence Visualizer
See the raw UTF-8 byte sequences behind any text with byte-by-byte breakdown.
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What is UTF-8 Viz?
UTF-8 is a variable-width encoding: 1 byte for ASCII, 2-4 bytes for other characters. This visualizer shows the raw bytes behind any text string.
How it works
We encode via TextEncoder, then analyze each byte: 0xxxxxxx = ASCII, 110xxxxx = 2-byte start, 1110xxxx = 3-byte start, 11110xxx = 4-byte start, 10xxxxxx = continuation.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Realistic sample
Type or paste any realistic input — the tool computes the result locally and instantly.
Common mistakes
Expecting a server round-trip
Nothing is uploaded — every tool in this category runs entirely in your browser.