How binary encoding works
Computers store all information — text, images, audio — as sequences of 0s and 1s. A single 0 or 1 is called a bit. Eight bits grouped together form a byte, which can represent 256 distinct values (0–255). Text encoding is the system that maps bytes to human-readable characters.
This converter represents each byte as an 8-character group of 0s and 1s, with groups separated by spaces. For example, the letter H has a decimal value of 72, which in binary is 01001000.
ASCII vs. UTF-8 — what's the difference?
ASCII (American Standard Code for Information Interchange) defines 128 characters using values 0–127. It covers the English alphabet, digits, punctuation, and basic control characters. One byte per character, always.
UTF-8 is a superset of ASCII that encodes over a million characters — every letter from every language, symbols, emoji, and more. Characters 0–127 are identical to ASCII (one byte each). Characters beyond that use 2, 3, or 4 bytes per character, encoded as specific multi-byte sequences.
Common character reference
| Character | Decimal | Binary |
|---|---|---|
| A | 65 | 01000001 |
| B | 66 | 01000010 |
| Z | 90 | 01011010 |
| a | 97 | 01100001 |
| z | 122 | 01111010 |
| 0 | 48 | 00110000 |
| 9 | 57 | 00111001 |
| Space | 32 | 00100000 |
| ! | 33 | 00100001 |
Reference Guides
Frequently asked questions
Why does the binary input need to be in 8-digit blocks?
Standard text decoding operates on complete bytes, and a single byte is always made up of 8 bits. If a group has only 6 or 7 digits, it represents a corrupted or incomplete byte block that the system cannot reliably map to a real text character.
What causes a binary decoding error?
Decoding errors usually happen when the input contains invalid characters (like regular letters or symbols), groups that aren't 8 bits long, or binary byte combinations that violate UTF-8 structural rules. If you run into formatting issues, toggling the tool over to ASCII mode will translate the raw byte codes directly without enforcing strict UTF-8 validation rules.
Can I paste binary code that represents images or files?
This particular tool is explicitly optimized to parse text-encoded data frameworks (ASCII and UTF-8). If you paste raw binary data compiled from a compiled application file or an image, the output will likely render as unreadable broken symbols or placeholders.
Does this converter store my data?
No. All calculations are executed directly inside your web browser. No binary scripts or decoded outputs are ever transmitted to our servers or saved anywhere.