Convert binary code to text and text to binary online free - no login. Supports ASCII, UTF-8, and custom separators. Instantly decode any binary sequence into readable English.
Binary-to-text conversion appears in CS education, coding puzzles, cipher challenges, and data encoding contexts. Converting binary to readable text (or vice versa) manually for more than a few characters is impractical - this handles any length instantly.
Enter binary code (sequences of 0s and 1s) and convert it to readable ASCII text. Or enter any text and see its binary representation - 8 bits per ASCII character.
Decode a binary message from a cipher or puzzle, learn how ASCII characters are represented in binary, convert text to binary for an educational demonstration, decode binary-encoded data from a technical exercise, understand how computers store text as bit patterns, verify binary representations of specific characters, and solve binary-based CTF (Capture the Flag) challenges.
The most common question is why some binary sequences don't produce readable text. Valid ASCII text requires binary groups that map to printable characters (values 32–126). Binary outside this range maps to control characters or extended ASCII - which may display as boxes or invisible characters in standard text rendering.
Paste your binary code (e.g. 01001000 01101001).
Switch to text-to-binary mode to encode any text.
Instantly see the decoded text or binary output.
Copy the result to your clipboard.
Common questions about this tool and how to use it.
Each character in ASCII text is assigned a number (A = 65, a = 97, space = 32). That number is converted to 8-bit binary. Example: 'A' = 65 = 01000001. A word like 'Hi' = 'H'(72=01001000) + 'i'(105=01101001) = '01001000 01101001'. The text-to-binary direction works by looking up each character's ASCII value and converting to 8-bit binary groups. Binary-to-text reverses this: split into 8-bit groups, convert each to decimal, look up the ASCII character.
Read the binary number right to left. Multiply each digit by 2 raised to its position (starting at 0 on the right). Add all results. Example: 01000001. Position 0 (rightmost): 1×2⁰=1. Position 6: 1×2⁶=64. All others are 0. Total: 64+1=65. This equals ASCII 'A'. For the common binary-to-text use case, you don't need to do this manually - group the binary into 8-bit chunks and look up each ASCII value directly.
Standard ASCII uses 7 bits (128 characters: 0–127), but computers work with bytes (8-bit units), so ASCII values are stored in 8-bit bytes (with the leading bit set to 0). Extended ASCII uses all 8 bits for 256 characters. UTF-8 encoding uses 1–4 bytes per character - Latin characters still use 1 byte (matching ASCII), while characters from other scripts use 2–4 bytes. Binary-to-text converters typically use 8 bits per character for ASCII.
Binary (base-2) is the foundational number system of all digital computers because transistors have two stable states that map directly to 0 and 1. All data - text, images, audio, programs - is ultimately stored as sequences of binary digits (bits) in memory and on storage. The layers of encoding (ASCII, Unicode, JPEG, MP3) are systems for converting meaningful data into binary and back. Binary itself is a number system; the 'binary code' of text is text encoded as ASCII binary.
Space (32): 00100000. A (65): 01000001. a (97): 01100001. 0 (48): 00110000. ! (33): 00100001. The pattern: uppercase letters start at 65 (01000000 + position in alphabet). Lowercase letters start at 97 (uppercase + 32, which just sets bit 5). Digits 0–9 start at 48. The difference between uppercase and lowercase in binary is a single bit flip (bit 5) - which is why case-insensitive comparisons are fast in low-level code.
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