ASCII (American Standard Code for Information Interchange) is a character encoding standard that assigns numbers 0-127 to letters, digits, punctuation, and control characters. For example, 'A' is 65 (binary 01000001) and 'a' is 97 (binary 01100001).

How is ASCII different from Unicode?

ASCII uses 7 bits and covers 128 characters (English letters, digits, symbols). Unicode extends this to over 143,000 characters across all writing systems. The first 128 Unicode code points are identical to ASCII, making ASCII a subset of Unicode (UTF-8).

ASCII ↔ Binary Converter

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FAQ

ASCII (American Standard Code for Information Interchange) assigns numbers 0–127 to English letters, digits, punctuation, and control characters. It uses 7 bits per character. Extended ASCII uses 8 bits (0–255) for additional characters.

ASCII covers 128 characters (English-centric). Unicode (UTF-8/16/32) extends to 143,000+ characters across all languages. The first 128 Unicode code points match ASCII exactly, making ASCII a subset of UTF-8.

ASCII ↔ Binary Converter

Character Breakdown

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