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Hex Decoder

Decode hex strings, byte dumps, and control characters into ASCII or UTF-8 text. Runs locally in your browser with no upload step.

100% Client-Side • No Data Sent • Instant Conversion • No Signup

Use this hex decoder for byte dumps, protocol payloads, file headers, and escaped data. It accepts common hex formats and makes control characters such as 0A and 0D easier to identify.

Hex Input

ASCII Output

Hello World

Separator

Prefix

Case

Encoding

Non-printable

Hex Decoder Examples

Hex input	Decoded result	Meaning
48656C6C6F	Hello	Continuous hex string with one byte per ASCII character.
48 65 6C 6C 6F	Hello	The same bytes written with spaces between each hex pair.
0A	Line feed (LF)	Newline control character, often written as \n.
0D	Carriage return (CR)	Return control character, often written as \r.
0D 0A	CRLF line break	Two-byte line ending used in Windows files and many protocols.

The examples above show common search and debugging cases: 48656C6C6F = Hello, 0A = line feed, and 0D = carriage return.

ASCII Character Map

Printable Characters (32–126)

Char	Hex	Dec	Description

Control Characters (0–31, 127)

Char	Hex	Dec	Description

How Hex to ASCII Works

Split into byte pairs

"48 65 6C 6C 6F" → [48] [65] [6C] [6C] [6F]

Convert each to decimal

48₁₆ = 72₁₀, 65₁₆ = 101₁₀, …

Map to ASCII character

72 → 'H', 101 → 'e', 108 → 'l', 108 → 'l', 111 → 'o'

✓

Result

"Hello"

What is Hexadecimal?

Hexadecimal (base-16) is a number system that uses 16 symbols: digits 0–9 and letters A–F. It's the standard way to represent binary data in a human-readable format because each hex digit maps exactly to 4 bits, making it compact and easy to convert mentally.

Base	Name	Digits	Example (72)
2	Binary	0, 1	01001000
8	Octal	0–7	110
10	Decimal	0–9	72
16	Hexadecimal	0–9, A–F	48

Every time you look at a hex dump, a network packet, or a file header, you're seeing data encoded as hex. Converting it to readable ASCII text is one of the most common operations in debugging, data analysis, and reverse engineering.

Hex to ASCII Conversion Method

The conversion from hexadecimal to ASCII is mechanical and reversible:

Split the hex string into byte pairs — each pair of hex digits represents one byte (8 bits)
Convert each pair to decimal — multiply the first digit by 16, add the second: 4×16 + 8 = 72
Look up the ASCII character — decimal 72 = 'H', 101 = 'e', 108 = 'l', 111 = 'o'
Combine characters — the result is "Hello"

ASCII vs UTF-8

For values 0x00–0x7F, ASCII and UTF-8 produce identical results — UTF-8 is backward-compatible with ASCII. The difference appears above 0x7F: ASCII can't represent these values, while UTF-8 uses multi-byte sequences to encode over 1 million characters. Toggle between encodings in the format options above.

Common Use Cases

Debugging network traffic — reading hex dumps from Wireshark or tcpdump
Reverse engineering — examining binary file headers and magic bytes
Web development — decoding URL-encoded or hex-escaped strings
Cryptography — reading hash outputs, keys, and encrypted data
Serial communication — interpreting UART/SPI/I2C data logs
Database administration — viewing BLOB and binary column data

Hex to ASCII Conversion

Hex to ASCII conversion is the process of translating hexadecimal byte values back into their corresponding ASCII characters. Each pair of hex digits represents one byte (0x00–0x7F for standard ASCII). This is the most common use of our converter — paste a hex dump and get readable text instantly.

Need to go the other direction? Use our Text to Hex converter to convert any text to hexadecimal. For individual character lookups, try the ASCII Code Converter or browse the full ASCII Table.

Dedicated landing pages are also available for hex to text conversion and the hex decoder workflow.

Convert Hex to Text Online

"Hex to text" and "hex to ASCII" produce the same result for standard English characters. The distinction matters when dealing with multi-byte characters: converting hex to text typically implies UTF-8 decoding, which supports characters from every language — accented letters, Chinese/Japanese/Korean, Arabic, emoji, and more.

Our converter handles both: toggle between ASCII and UTF-8 encoding in the format options above. For values 0x00–0x7F, the output is identical. For multi-byte UTF-8 sequences (like C3 A9 → "é"), select UTF-8 encoding for correct decoding.

Examples

48 65 6C 6C 6F → "Hello" (pure ASCII)
43 61 66 C3 A9 → "Café" (UTF-8, "é" = 2 bytes)
E4 BD A0 E5 A5 BD → "你好" (UTF-8, each char = 3 bytes)

For a dedicated page focused on this wording, use the Hex to Text converter. To convert text back to hex, use the Text to Hex converter.

Hex to String Conversion

In programming, "hex to string" refers to converting a hexadecimal-encoded byte sequence into a string object. This is common when working with network protocols, binary formats, or encoded data. The result is identical to hex-to-text — the difference is terminology (developers say "string", users say "text").

Code Examples

JavaScript


                            const hex = "48656C6C6F";

                            const str = hex.match(/.{2}/g).map(b => String.fromCharCode(parseInt(b, 16))).join("");

                            // "Hello"

Python


                            hex_str = "48656C6C6F"

                            result = bytes.fromhex(hex_str).decode("utf-8")

                            # "Hello"


                            b, _ := hex.DecodeString("48656C6C6F")

                            str := string(b) // "Hello"

For a byte-dump focused page, use the Hex Decoder. For a full reference of character codes, see the ASCII Table.

Related Hex Conversion Pages

Hex to ASCII Converter Convert hex bytes directly to ASCII characters. Hex to Text Converter Decode hexadecimal as readable ASCII or UTF-8 text. ASCII to Hex Converter Convert text back into hexadecimal bytes.

Frequently Asked Questions

How do I convert hex to ASCII or text online?

Paste your hex string into the input field above. The converter accepts continuous hex, space-separated bytes, colon-separated bytes, and 0x-prefixed values. For example, 48656C6C6F decodes to Hello instantly.

What does 48656C6C6F mean in ASCII?

48656C6C6F converts to the word "Hello." The byte pairs are 48 = H, 65 = e, 6C = l, 6C = l, and 6F = o.

What do hex 0A and 0D mean?

0A is the line feed character, often written as LF or \n. 0D is the carriage return character, often written as CR or \r. Together, 0D 0A is the CRLF line ending used by Windows text files and many internet protocols.

What is the difference between hex to ASCII and hex to UTF-8?

ASCII covers 128 characters using values 0x00-0x7F. UTF-8 is backward-compatible with ASCII but also supports characters from every language using multi-byte sequences. For hex values in the 0x00-0x7F range, ASCII and UTF-8 produce identical output.

What hex values correspond to printable ASCII characters?

Printable ASCII characters range from hex 0x20 (space) to 0x7E (tilde). Values below 0x20 are control characters such as tab, line feed, and carriage return. 0x7F is the delete control character.

Can I convert large hex files to ASCII?

Yes. The tool runs entirely in your browser, so conversion happens locally without uploading data to a server. Large inputs are limited mainly by your device and browser memory.

How do I convert hex to ASCII in Python?

Use bytes.fromhex("48656C6C6F").decode("ascii") to get "Hello". For UTF-8 text, use .decode("utf-8") instead of .decode("ascii").

What is ASCII code?

ASCII (American Standard Code for Information Interchange) is a character encoding standard that maps numbers 0-127 to English letters, digits, punctuation, and control codes. Every hex pair from 00 to 7F maps to one ASCII character.

Is this hex decoder free?

Yes. The converter is free, does not require signup, and performs the conversion client-side in your browser.

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