Developer Encoding

ASCII to hex

Direction

Base

Text

Hex codes 48 65 6C 6C 6F

One byte per character, two hex digits each

Without spaces 48656C6C6F

Characters 5

Note

Joined form is what code expects

Each character becomes its code point in hexadecimal, padded to two digits for ASCII. "Hello" becomes 48 65 6C 6C 6F. The joined form without spaces is what most tools and protocols expect.

How to encode text as hex

1 Type or paste the text.

2 Read the codes, spaced for reading or joined for pasting.

3 Switch direction to decode instead.

4 Non-ASCII characters produce codes above 7F.

The joined form matters more than it looks. Protocols, hex editors and most command-line tools expect an unbroken string of hex digits with no separators — spaces are purely a reading aid. Where a byte count matters, remember that ASCII gives two hex digits per character but anything outside ASCII does not: an emoji is a code point above 0xFFFF and needs five or six digits, which is a different thing from its UTF-8 byte length.

Questions

What is "A" in hex? −

41. Lowercase "a" is 61.

Why do some characters give more than two digits? +

Should I use the spaced or joined form? +

Is this the same as UTF-8 bytes? +

What about a newline? +

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