Tool 1
Hex to ASCII
Paste bytes and decode them into text instantly.
Ready for hex input.
ASCII Output
Hello
Byte Preview
Dual Tool Page Hex to ASCII ASCII to Hex
Hex to ASCII Converter Decode and Encode Text Bytes
Convert hexadecimal bytes into readable ASCII text, then flip directions and encode ASCII back into hex on the same page. This guide also includes byte diagrams, worked examples, reference values, and code snippets.
Tool 2
ASCII to Hex
Encode plain ASCII text into hexadecimal bytes.
Ready for text input.
Hex Output
48 65 6C 6C 6F
Character Preview
Visual Guide
One byte, one character
Standard ASCII works byte by byte. Every 2-digit hex value becomes one decimal code, and that code becomes one character.
48
->
72
->
H
65
->
101
->
e
6C
->
108
->
l
Formula
decimal = (first digit x 16) + second digit
48(4 x 16) + 8 = 72
41(4 x 16) + 1 = 65
20(2 x 16) + 0 = 32
Worked Examples
Real strings decoded byte by byte
Hex
48 65 6C 6C 6F
->
ASCII
Hello
Hex
47 45 54
->
ASCII
GET
Hex
57 6F 72 6C 64
->
ASCII
World
JavaScript
const bytes = hex.match(/[0-9A-Fa-f]{2}/g) || [];
const text = bytes.map((b) =>
String.fromCharCode(parseInt(b, 16))
).join(""); Python
text = bytes.fromhex("48656C6C6F").decode("ascii")
hex_bytes = " ".join(f"{ord(ch):02X}" for ch in "Hello") Reference
Useful ASCII hex values
20
32
Space
21
33
!
30
48
0
31
49
1
41
65
A
42
66
B
48
72
H
57
87
W
61
97
a
65
101
e
6C
108
l
6F
111
o
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FAQ
Common questions about hex and ASCII
How to convert hex to ASCII
Split the hex string into 2-digit bytes, convert each byte to decimal, then map each decimal value to its ASCII character.
How to convert ASCII to hex
Convert each character to its ASCII decimal code, then convert each decimal code to a 2-digit hexadecimal byte.
Can I decode hex with spaces or 0x prefixes
Yes. The tool accepts continuous hex, spaced bytes, and prefixed forms like 0x48 0x65.
Do all bytes decode to standard ASCII
No. Standard ASCII only covers values from 00 to 7F. Higher bytes belong to other encodings.
Why do some results show dots
Control bytes and non-printable values are shown as dots in the visual preview so the byte structure still stays readable.
Can I encode full words to hex here too
Yes. The second tool on the same page converts plain ASCII text directly into hexadecimal bytes.