🔤 Hex to ASCII Converter

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Text Length: {{ analysis.text_length }}
Characters: {{ analysis.character_count }}
Bytes Used: {{ analysis.bytes_used }}
Encoding: {{ analysis.encoding_used.toUpperCase() }}
Hex Length: {{ analysis.hex_length }}
Hex Pairs: {{ analysis.hex_pairs }}
Chars/Byte: {{ analysis.chars_per_byte }}
Printable: {{ analysis.printable_percentage }}%
Unique Characters: {{ analysis.unique_characters }} | Entropy: {{ analysis.entropy }} bits
Character Range:'{{ analysis.character_range.min_char }}' ({{ analysis.character_range.min_ord }}) →'{{ analysis.character_range.max_char }}' ({{ analysis.character_range.max_ord }})
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{{ hex }}
{{ byteValues[index] ||'' }}
{{ operation ==='hex_to_ascii' ? String.fromCharCode(byteValues[index] || 0) : outputText.split('').find((_, i) => i === Math.floor(index / (hexPairs.length / outputText.length))) ||'' }}
... and {{ hexPairs.length - 20 }} more pairs
⚠️ {{ error }}

ℹ️ About Hex to ASCII Converter

Hex to ASCII conversion turns byte values written in hexadecimal into readable text, and ASCII to hex does the reverse by writing each text byte as two base-16 digits. One byte maps cleanly to two hex digits, so 48 65 6c 6c 6f decodes to Hello.

Use this converter when copying bytes from packet captures, logs, hex dumps, firmware notes, shell output, color strings, or API payloads and you need to check what the bytes represent as text. It also works in the other direction for creating spaced, continuous, or custom-separated hexadecimal test vectors.

Encoding choice matters. ASCII accepts only byte values 00-7f, Latin-1 maps each byte 00-ff to one character, and UTF-8 uses one to four bytes for each Unicode code point. For example, Café is 43 61 66 c3 a9 in UTF-8 but 43 61 66 e9 in Latin-1.

  • Spaced hex: 48 65 6c 6c 6f is easiest to read in byte-by-byte notes.
  • Continuous hex: 48656c6c6f is compact, but it must contain an even number of digits.
  • Custom separator: 48:65:6c:6c:6f is useful when matching colon- or dash-separated data.

Limits and troubleshooting: remove 0x prefixes from byte lists, keep each byte to one or two hex digits, and remember that not every hex string is text. Hashes, encrypted data, compressed data, and file fragments may be valid hexadecimal but still decode as control characters or replacement symbols. If the output looks garbled, try switching between UTF-8 and Latin-1 or compare individual byte values with an ASCII table.

Primary references: RFC 20 documents ASCII for network interchange, RFC 3629 defines UTF-8 byte sequences, and the IANA Character Sets registry lists registered charset names including US-ASCII, ISO-8859-1, and UTF-8.

API Usage Example:

POST /api/tools/encoding-decoding/hex-ascii
Content-Type: application/json

{
    "operation": "hex_to_ascii",
    "input": "48 65 6C 6C 6F",
    "format": "spaced",
    "separator": " ",
    "case": "lowercase",
    "encoding": "ascii"
}
Ready