Hex to ASCII Converter

By Suraj GiriUpdated 24 September 2026

This converter works on code values, one at a time, from the table. Codes run from 0 to 127; anything above that is reported as out of range. For whole text rather than single codes, use Hex to Text; for a plain number, use Hex to Decimal.

Going the other way? Convert ASCII code back to hex →

How do you convert hex to ASCII?

Hex to ASCII code conversion reads each value as a code between 0 and 127 and looks up the character that the ASCII table gives for it.

1. Read the first value: 48.
2. Convert it to a decimal code: 48 is 72.
3. Look that code up in the table: 72 is H.
4. Repeat for every value and join the characters in order: 48 69 = Hi.

Hex to ASCII reads 48 69 as two separate codes; the binary converter overview explains when a hex value such as 0x2F is one number instead.

Hexadecimal to ASCII Code Conversion Table

The codes this page works through, each with the character it stands for and the same value in hex, octal and binary. Find the code in the first column and read across; the row is the whole conversion. Codes 0 to 31 and 127 have no glyph, so the Char column shows their short name instead. 0b marks binary, 0o octal, 0x hexadecimal; a leading # marks a hex colour. Hexadecimal is not case-sensitive (FF = ff); iToolHub writes hex digits in uppercase. This page shows the rows you need; ASCII code chart (decimal, hex, octal, binary) carries all 128.

The base this page writes, defined by the digits it uses, how a value is marked, and what each position is worth.

Worked Example: 48 69 to ASCII

One code value, taken from the table and written out in full. This is the same working the converter shows when you turn on "show steps".

Start with the first code, 48, which is 72 in decimal. Row 72 of the table is the letter H. There is no arithmetic to get wrong, only a row to find, and every base the table carries lands on the same row.

The rest follow the same way: 69 is the letter i. Joining the characters in order gives Hi. A code above 127 has no row, and the converter reports it as out of range instead of guessing.

Check it in reverse

Read it back and you arrive where you started: the letter H is code 72, which is 48 in hex. The table is a two-way lookup, not a calculation, so no rounding or padding can change the answer. To verify the result by hand, encode the text back to hex bytes and compare it with the value you started from.

Worked examples: hex to ASCII

Each example gives the value first, then the working. Click a value to load it in the converter.

Every example above reverses exactly — encode the same string back into hex bytes.

What Changes the Code Output?

Values above 127

A value above 127 is out of range and the converter says so rather than guessing. Codes 128–255 belong to extended sets such as Latin-1, not to ASCII, so there is no single right character for them. Every code that is in range is listed in the ASCII table this converter reads from.

Which base the code is written in

The same code can be written in decimal, hex, octal or binary: 65, 41, 101 and 01000001 are all the letter A. This page reads hex only, so a code in another base names a different row.

Control codes and printable codes

Codes 32 to 126 are printable characters; 0–31 and 127 are control codes. A control code has no glyph, so the table shows its short name instead — 10 is LF, 13 is CR. Converting one is valid; displaying one is not.

One code or a list

Several codes separated by spaces, commas or new lines convert as a list, in order, and each keeps its own row. The separator is a display choice and does not change any value. A run with no separator is cut into 2-digit codes.

Hex to ASCII in Code

The same rule in one line. Both take code values and return the characters.

Python: bytes(int(g, 16) for g in s.split()).decode('ascii')

JavaScript: new TextDecoder().decode(new Uint8Array(s.split(/\s+/).map(g => parseInt(g, 16))))

Common Mistakes

• Typing text where a code value belongs. The converter reads 72 as one code, not as the characters 7 and 2 — for whole text use decode hex as a UTF-8 string instead.
• Reading a code in the wrong base. 41 is A in hex and ) in decimal.
• Expecting a character above 127. That value is outside ASCII and the answer depends on which extended set is meant.
• Dropping the padding on a fixed-width code, so a list of codes can no longer be split apart.

Frequently Asked Questions

Related Conversions

• Hex also converts to decimal by the same lookup — convert hexadecimal to decimal.
• Hex also converts to binary by the same lookup — convert hexadecimal to binary.
• Hex also converts to octal by the same lookup — convert hexadecimal to octal.
• If your input is binary rather than hex, convert binary to ASCII code instead.
• If your input is text rather than hex, character to ASCII code lookup instead.
• If your input is ASCII codes rather than hex, read ASCII codes 0-127 as characters instead.

The rest of the family sits on the rest of the binary converters.