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UTF-8 Byte Inspector

See exactly how text is encoded — code points, UTF-8 bytes, names and byte counts per character.

To inspect how text is encoded, type it above and every character is broken down into its Unicode code point, decimal value and UTF-8 byte sequence. This is the quickest way to diagnose mojibake, unexpected string lengths and multi-byte truncation bugs.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Why does one character take several bytes?

UTF-8 is variable width. ASCII characters take one byte, most European and Middle Eastern scripts take two, most Asian scripts three, and emoji four. That design keeps English text compact while representing every script.

What is a replacement character?

The � symbol, inserted when bytes cannot be decoded as valid UTF-8. Seeing it means the text was decoded with the wrong encoding, and the original bytes are usually still recoverable if you know what the encoding actually was.

How to use the utf-8 byte inspector

  1. 1Enter or paste your text.
  2. 2The result appears immediately — copy or download it.

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Put the working utf-8 byte inspector on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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