ASCII (American Standard Code for Information Interchange) is a character encoding standard that represents text in computers. Each character (letter, number, symbol) is assigned a unique numerical code from 0 to 127. For example, 'A' is 65, 'B' is 66, 'a' is 97, and '0' is 48. This tool converts between these numerical codes and readable text characters.

Standard ASCII covers 128 characters including uppercase letters (A-Z), lowercase letters (a-z), numbers (0-9), punctuation marks, and control characters. Extended ASCII includes additional characters up to 255, covering various symbols and accented letters. This tool handles the full range of ASCII characters from 0 to 255.

To convert ASCII codes back to text, simply paste the ASCII numbers (separated by spaces) into the input field and click the "ASCII to Text" button. The tool will automatically detect the ASCII codes and convert them back to their corresponding characters. Each number should represent a valid ASCII code between 0 and 255.

ASCII is limited to 128-255 characters and primarily covers English characters and basic symbols. Unicode is a much larger standard that supports over 140,000 characters from virtually all writing systems worldwide, including emojis. While ASCII uses 7-8 bits per character, Unicode can use 8, 16, or 32 bits to represent a much wider range of characters.

Yes, this tool can convert all standard ASCII characters including special symbols like !, @, #, $, %, &, *, and punctuation marks. Extended ASCII characters (codes 128-255) are also supported, which include various symbols, accented letters, and special characters used in different languages and contexts.