This converter turns text into hexadecimal, the compact notation engineers use to read raw bytes. Each character is encoded as UTF-8 and then printed as two hex digits per byte, so 'Hi' becomes 48 69 while an emoji expands to four byte pairs. Hex is preferred over binary in debugging because it is four times shorter yet still maps cleanly to bits — one hex digit equals exactly four bits, so 0xF is 1111. Use it when you need to compare what a system received against what you sent, when you are writing test vectors for an embedded protocol, or when a colour, checksum or memory value has to be expressed byte by byte.
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