Hexadecimal encoder / decoder

Paste or type your text and it converts instantly. Encode mode turns any text into UTF-8 bytes shown as hexadecimal — the same bytes the Bytes stat counts — with optional uppercase digits and space separators. Decode mode accepts hex with or without 0x prefixes, spaces, commas or colons, and turns it back into readable text with a friendly error message for invalid input instead of breaking the page. Emoji and CJK characters round-trip correctly.