Hex to ASCII Converter — Hex ↔ Text (Free)

Decode hex bytes to ASCII/UTF-8 and encode text back to hex

Operating Mode

Required Parameters

Hex bytes

Waiting for input data...

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Quick Answer

Each pair of hex digits is one byte. 48='H', 65='e', 6C='l', 6F='o' → Hello. Reverse: Hello → 48 65 6C 6C 6F.

Documentation

Hex to ASCII Converter

Decode hexadecimal bytes to ASCII / UTF-8 text, or encode a string back to hex. Built for firmware dumps, UART captures, and protocol payloads.

Quick start: Paste 48 65 6C 6C 6F or 48656C6C6F → Hello. Switch to ASCII to Hex to encode.

Hex to ASCII table (printable)

Hex	Char	Hex	Char
20	(space)	30–39	0–9
41–5A	A–Z	61–7A	a–z
0A	newline	0D	CR
00	NUL	7F	DEL

Hello = 48 65 6C 6C 6F. OK = 4F 4B. 0xFF as a byte is ÿ in Latin-1 / a non-ASCII UTF-8 fragment.

Accepted hex formats

Spaced: 48 65 6C 6C 6F
Continuous: 48656C6C6F
Prefixed: 0x48 0x65 0x6C
Separators: commas, colons, hyphens

Odd-length strings are padded with a leading 0.

Hex to ASCII vs hex to binary

This page treats hex as a byte string and decodes text.
Hex to Binary Converter treats hex as an integer (FF → 11111111).

Related tools

Design Notes

Firmware logs, UART captures, and protocol analyzers almost always show payloads as hex. This converter decodes those bytes as UTF-8 (ASCII is the 0x00–0x7F subset). Non-text bytes still convert — they just may not be printable.

Common Mistakes

1
Forgetting that one ASCII character is two hex digits. 48 is 'H', not 4 and 8 as separate letters.
2
Mixing UTF-8 multi-byte characters with Latin-1. É is C3 89 in UTF-8, not E9 unless you meant Latin-1.
3
Leaving an odd number of hex digits. The converter pads a leading 0 so A becomes 0A.

Engineering Handbox

48='H', 65='e', 6C='l', 6C='l', 6F='o'

VerificationHello

Knowledge Base

How do I convert hex to ASCII?

Split the hex string into byte pairs, convert each pair from base 16 to a character. 48 65 6C 6C 6F becomes H e l l o. This converter also accepts 0x48,0x65 and 48656C6C6F.

How do I convert ASCII or text to hex?

Switch to ASCII to Hex and type the string. Each UTF-8 byte is printed as two hex digits. Hello → 48 65 6C 6C 6F. Space is 20; newline is 0A.

What is hexadecimal to ASCII used for?

Firmware logs, UART/SPI captures, memory dumps, and protocol analyzers show payloads as hex. Decoding them to ASCII (or UTF-8) is how you read strings, AT commands, and JSON hidden in a dump.

Does this support UTF-8 or only ASCII?

It decodes bytes as UTF-8. Standard ASCII (0x00–0x7F) is a subset, so English text is identical. Multi-byte characters such as € (E2 82 AC) decode correctly.

What if my hex string has an odd number of digits?

The converter pads a leading zero so A becomes 0A. Prefer even-length strings so you do not accidentally shift every byte.

How is this different from hex to binary?

Hex to binary converts a number between bases (FF → 11111111). Hex to ASCII treats hex as a byte string and decodes it as text. Use the hex to binary converter for integers; use this page for dumps and strings.

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