Decimal to ASCII

Free Decimal to ASCII Converter — ASCII Table Lookup Tool

ASCII (American Standard Code for Information Interchange) is the foundational character encoding of computing — every letter, digit, and punctuation mark in English corresponds to a decimal number from 32 to 126. This free Decimal to ASCII Converter instantly translates space-separated decimal values to their ASCII characters, and converts text back to decimal values, with a full ASCII table reference built in.

Enter space-separated decimal numbers (like 72 101 108 108 111) to decode them to text ("Hello"). Or enter any text to get the decimal ASCII values for each character. Useful for programming exercises, encoding/decoding tasks, CTF challenges, and data analysis.

ASCII is especially important to know for programming — character comparisons in code often use numeric values (e.g., checking if a character is between 65–90 for uppercase, 97–122 for lowercase, 48–57 for digits). Understanding the ASCII table makes string manipulation code much more intuitive.

Key ASCII Ranges

32–47. Space and basic punctuation: space, !, ", #, $, %, &, ', (, ), *, +, comma, -, ., /

48–57. Digits 0–9. Decimal 48 = '0', 57 = '9'. Used to check if a character is a digit: char >= 48 && char <= 57.

65–90. Uppercase letters A–Z. Decimal 65 = 'A', 90 = 'Z'. Difference between uppercase and lowercase is always 32.

97–122. Lowercase letters a–z. Decimal 97 = 'a', 122 = 'z'.

0–31 and 127. Control characters (non-printable): newline (10), carriage return (13), tab (9), null (0), backspace (8), escape (27).

Related Tools

• Binary to Text – Convert binary code to ASCII text.
• Binary Calculator – Arithmetic and conversion between number bases.
• HTML Character Codes – HTML entities and special character reference.

Frequently Asked Questions