ASCII to Hex Converter

ASCII to Hexadecimal Conversion

ASCII to hexadecimal conversion converts each character's ASCII code (0-255) to its hexadecimal representation.

Formula: hex = ASCII code in base-16

For example:

• Character 'A' has ASCII code 65, which is 0x41 in hexadecimal
• Character 'a' has ASCII code 97, which is 0x61 in hexadecimal
• Character '0' has ASCII code 48, which is 0x30 in hexadecimal

ASCII

What is ASCII?

ASCII (American Standard Code for Information Interchange) is a character encoding standard that uses 7 bits to represent 128 characters, including letters (both uppercase and lowercase), digits, punctuation marks, and control characters. ASCII codes range from 0 to 127, with extended ASCII supporting codes 0-255.

History and Usage

ASCII was developed in the 1960s and became the standard character encoding for computers and communication equipment. It is still widely used today in programming, data transmission, and text processing. Each character in ASCII has a unique numeric code that can be represented in different number systems including decimal, binary, octal, and hexadecimal.

ASCII Character Set

The ASCII character set includes 128 standard characters: control characters (0-31), printable characters (32-126), and the DEL character (127). Extended ASCII (128-255) includes additional characters for international use, currency symbols, and special characters.

Hexadecimal

What is Hexadecimal?

Hexadecimal (hex) is a base-16 number system that uses 16 symbols: digits 0-9 and letters A-F (or a-f). It is commonly used in computing and programming because it provides a compact representation of binary data. Each hexadecimal digit represents 4 bits, so two hex digits represent one byte (8 bits).

Why Use Hexadecimal?

Hexadecimal is widely used in programming, debugging, memory addresses, color codes (HTML/CSS), and data representation. It's easier to read and write than binary, and more compact than decimal for representing binary data. Many programming languages use the 0x prefix to denote hexadecimal numbers.

Hexadecimal in Computing

Hexadecimal is essential in low-level programming, memory management, network protocols, and file formats. It's used to represent memory addresses, binary data, color values, and encoded strings. For example, memory addresses are often displayed in hexadecimal, and HTML color codes use hexadecimal notation (#RRGGBB).

ASCII to Hexadecimal Conversion Table

Common ASCII characters and their hexadecimal representations: