ASCII (American Standard Code for Information Interchange) is a 7-bit character encoding standard that assigns numeric code points (0–127) to 128 characters including letters, digits, punctuation, and control characters.

Why are binary values 8 bits long?

Although ASCII only requires 7 bits, values are conventionally zero-padded to 8 bits (one byte) to align with modern byte-oriented memory and data systems.

What happens with characters outside standard ASCII?

Characters with code points above 127 (such as accented letters or emoji) are not part of standard ASCII. This tool shows their Unicode code point in binary, which may exceed 8 bits.

Can I convert binary back to ASCII?

Yes — use the Binary Decoder tool on this site to reverse the process and convert binary strings back to readable text.

What does the "no spaces" output look like?

Each 8-bit group is concatenated without separators, producing a continuous binary stream such as 0100100001100101 for "He". This matches the raw bit format used in data transmission.

What is 01101001 in ASCII?

The binary value 01101001 equals decimal 105, which is the lowercase letter "i" in ASCII. Each 8-bit group maps to one character code point between 0 and 127.

ASCII to Binary Converter

Name: ASCII to Binary Converter
Availability: InStock
Author: Nham Vu

Type or paste ASCII text and instantly see the 8-bit binary representation of each character.

ASCII Input

Space between bytes Show character table

Try:

Binary Output

Output will appear here

Character Breakdown

#	Char	Decimal	Hex	Binary (8-bit)

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Summary