Ascii to Hex Converter

What Is ASCII Text?

ASCII is a character coding standard that gives letters, numbers, and symbols values from 0 to 127. Each ASCII character has a decimal value, which you can convert into a hexadecimal value. This makes text easier to store, inspect, and understand in computer systems.

What Is Hexadecimal?

Hexadecimal is a base-16 number system. It uses digits 0 to 9 and letters A to F. Computers use hex to show bytes in a shorter form, making digital values easier to read. One hex digit represents four binary bits. Each pair of hex digits can show one byte of data.

How to Convert ASCII to Hex Manually

Convert ASCII to Hex by finding each character's decimal value, then changing it to base 16.

Formula

$Hex = decimal value converted to base\ 16$

Step by step Guide

1. Choose an ASCII character.
2. Find its ASCII decimal value.
3. Divide the value by 16.
4. Write the quotient and remainder as hex digits.
5. Combine the digits to get the hex value.
6. Repeat for each character.

Practical Example

A has ASCII value 65. $65 ÷ 16 = 4$ remainder $1$, so A becomes $41$ in hex. For Hi, H is 72 = $48$ and i is 105 = $69$. So Hi becomes $48\ 69$.

ASCII to Hex Conversion Table

Note: ASCII values use decimal codes from 0 to 127. Convert each character separately, then join the hex values in the same order as the original text.

ASCII to Hex Conversion (Programming Examples)

You can also convert ASCII characters to hexadecimal with code. These examples work with basic ASCII text and produce two-digit hexadecimal values.

JavaScript ASCII to Hex

const text = "Hi";

const hex = [...text]
.map(char => char.charCodeAt(0).toString(16).padStart(2, "0"))
.join(" ");

console.log(hex.toUpperCase());
// 48 69

This code gets each ASCII character, finds its decimal code, and changes it to hexadecimal.

Python ASCII to Hex

text = "Hi";

hex_value = " ".join(f"{ord(char):02X}" for char in text);

print(hex_value)
# 48 69

Python uses ord() to get the ASCII value and formats it as a two-digit hexadecimal value.

Java ASCII to Hex

String text = "Hi";
StringBuilder hex = new StringBuilder();

for (char c : text.toCharArray()) {
hex.append(String.format("%02X ", (int) c));
}

System.out.println(hex.toString().trim());
// 48 69

Java converts each ASCII character into its decimal code before formatting it as hex.

PHP ASCII to Hex

$text = "Hi";
$hex = "";

for ($i = 0; $i < strlen($text); $i++) {
$hex .= sprintf("%02X ", ord($text[$i]));
}

echo trim($hex);
// 48 69

PHP uses ord() to read each ASCII value and sprintf() to format the hexadecimal output.