ASCII转换器

Convert between ASCII characters, decimal codes, binary, and hexadecimal. ASCII (American Standard Code for Information Interchange) assigns numeric codes to 128 characters including English letters, digits, punctuation, and control characters. Codes 0-31 are control characters (tab, newline, etc.), 32 is space, 48-57 are digits 0-9, 65-90 are uppercase A-Z, and 97-122 are lowercase a-z. ASCII is the foundation of text encoding in computing—every text file, email, and web page uses ASCII-compatible encoding. Understanding ASCII is essential for programming, data processing, and cryptography. Modern systems use Unicode (UTF-8) which is backward-compatible with ASCII but supports characters from every writing system.