🔐 Encoding & Security
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Binary Encoder / Decoder
Convert text to binary (0s and 1s) or decode binary code back to readable text. Supports space-separated 8-bit groups, continuous binary, and shows ASCII character codes. Everything runs in your browser.
Plain Text
0 chars
Binary Output
0 bits
Enter text to convert to binary.
What is Binary Encoding?
Binary encoding converts text characters into their binary (base-2) representation — a sequence of 0s and 1s. Every character has an ASCII or Unicode code point, which is then represented as an 8-bit (or multi-byte for Unicode) binary number. For example, the letter A has ASCII code 65, which in 8-bit binary is 01000001.
Binary is the fundamental language of computers — all data is ultimately stored and processed as binary values, with each digit (bit) representing either an off (0) or on (1) electrical state.
Frequently Asked Questions
8 bits make one byte, which is the standard unit for encoding a single ASCII character. With 8 bits you can represent 256 different values (0–255), covering the entire ASCII character set. Unicode characters may require multiple bytes (UTF-8 uses 1–4 bytes per character), but for basic ASCII text, 8-bit groups are the convention.
This tool decodes binary by treating each 8-bit group as a byte and interpreting the resulting bytes as UTF-8. This correctly handles ASCII characters and many common Unicode characters. For complex multi-byte sequences (some emoji or non-Latin scripts), the UTF-8 decoding handles them correctly as long as the binary input represents valid UTF-8 bytes.
All three are different ways to represent the same number. Binary (base-2) uses only 0 and 1. Decimal (base-10) uses digits 0–9 (our everyday numbering). Hexadecimal (base-16) uses 0–9 and A–F. The number 65 in decimal is
01000001 in binary and 41 in hex — all represent the ASCII code for the letter 'A'.
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