ASCII Text to Hex Converter

What is ASCII Text to Hex Converter?

The browser-based utility converts ASCII letters to Hex bytes - encodes and translates characters, letters, words, and sentences. Use this tool to convert any text to Hex format.

How to Convert ASCII Characters to Hex Numbers

• Enter your text in the editor or upload your text files for conversion
• Click "Convert" to transform the data the equivalent Hex format
• You can copy the output or if you prefer, you can download the file

PHP Algorithm Converts ASCII code to Hexadecimal numbers

function ASCIIToHexadecimal($str)
{
    $hex = "";
    $strLen = strLen($str);

    for ($i = 0; $i < $strLen; $i++)
    {
        $chex = DecimalToHexadecimal(ord($str[$i]));

        if (strlen($chex) == 1)
            $chex = substr_replace($chex, "0", 0, 0);

        $hex .= $chex;
    }
    return $hex;
}

function DecimalToHexadecimal($dec)
{
    if ($dec < 1) return "0";

    $hex = $dec;
    $hexStr = "";

    while ($dec > 0)
    {
        $hex = $dec % 16;

        if ($hex < 10)
            $hexStr = substr_replace($hexStr, chr($hex + 48), 0, 0);
        else
            $hexStr = substr_replace($hexStr, chr($hex + 55), 0, 0);

        $dec = floor($dec / 16);
    }

    return $hexStr;
}

ASCII Characters, Hex, Oct, Binary Numbers Conversion Table

Hex System

Hex, or hexadecimal, is a number system of base 16. This number system is especially interesting because in our casually used decimal system we have only 10 digits to represent numbers. As hex system has 16 digits, the extra needed 6 digits are represented by the first 6 letters of English alphabet. Hence, hex digits are 0,1,2,3,4,5,6,7,8 and 9 A, B, C, D, E, F. This number system is the most commonly used in mathematics and information technologies. I.e. in html programming colors can be represented by a 6-digit hexadecimal number: FFFFFF represents white, 000000 represents black, and so on.

Decimal to hex conversion examples

• (79)₁₀ = (4F)₁₆
• (120)₁₀ = (78)₁₆
• (1728)₁₀ = (6C0)₁₆