Binary Code Translator

Translate binary to English and English to binary in one place. Supports real UTF-8 (so accented and non-Latin characters survive) as well as plain ASCII, with control over spacing between bytes.

Whether you call it binary code translator or binary translator, this free tool handles it instantly in your browser.

Enter text or binary

2 chars1 words

Options

Direction

Encoding

Separate bytes with

TranslationLive preview

01001000 01101001

Ctrl+Enter to copy | Ctrl+Z to undo

Example usage

Example input

Example output

01001000 01101001

Batch Processing

Enter multiple inputs, one per line. Each line will be processed separately.

Input (one per line)

Results

Why this tool?

Everything runs right in your browser — no uploads, no sign-up, no waiting. Your text never leaves your device.

Quick tips

•Outputs update live as you type.
•Use the sticky copy button to grab results quickly.
•Bookmark this page for fast access.

How it works

In encode mode each character becomes its byte value written as eight binary digits.
UTF-8 encodes characters outside plain English as multiple bytes, so é becomes 11000011 10101001 — two bytes, not one. ASCII mode uses a single byte per character instead.
In decode mode every 0 and 1 is collected and read back in groups of eight. Spaces, line breaks, and other characters are ignored.
If the digit count is not a multiple of eight, the tool tells you rather than returning silent garbage.

Use cases

Computer science homework and revision.

Decoding binary puzzles and CTF challenges.

Checking how a string is encoded byte by byte.

Teaching character encoding and the difference between ASCII and UTF-8.

How text becomes binary

Every character your computer stores is a number, and binary is just that number written in base two. The letter H is character code 72, which in eight binary digits is 01001000. Decoding runs the same process backwards: split the digits into groups of eight, read each group as a number, and look the number up as a character.

Eight digits is one byte, and the grouping is not optional — it is what tells the decoder where one character ends and the next begins. This is why a stray or missing digit breaks everything after it rather than just one letter, and why this tool reports the bit count instead of silently returning nonsense when the total is not a multiple of eight.

ASCII and UTF-8 are not the same thing

ASCII assigns one byte to each of 128 characters, which covers unaccented English and little else. UTF-8 covers every character in every writing system, and it does so by using more than one byte for anything outside that original set. The character é is a single byte in some legacy encodings but two bytes in UTF-8: 11000011 10101001.

The practical consequence is that "how many bytes is this text" has no answer until you name the encoding. If your input contains accents, emoji, or non-Latin script, use UTF-8 — ASCII mode will strip those characters down to a single byte each and corrupt them. If you are working through a computer science exercise that assumes one byte per character, ASCII mode reproduces that behaviour deliberately.

Reading binary by hand

The place values in a byte run 128, 64, 32, 16, 8, 4, 2, 1 from left to right. Add the values wherever there is a 1: 01001000 gives 64 + 8 = 72, which is H. With a little practice the common ranges become recognisable on sight — uppercase letters run 65 to 90 (010xxxxx), lowercase 97 to 122 (011xxxxx), and digits 48 to 57.

That pattern is a useful sanity check when a puzzle will not decode. If every byte starts 010 or 011 you are almost certainly looking at ordinary English text and the problem is a grouping error. If bytes start with 11, you are looking at multi-byte UTF-8 and need UTF-8 mode rather than ASCII.

Encoding

Explore all encoding and decoding tools

Browse every tool for this kind of task, along with helpful guides that show you how to get the most out of them.

Browse Encoding

Related tools

Numbers to Letters Converter

Use this A1Z26 cipher decoder to turn numbers into letters instantly with the classic A=1, B=2 … Z=26 mapping. Type sequences like 20 5 24 20 and get TEXT — with the full A1Z26 cipher chart below for quick reference.

Letters to Numbers Converter

Map letters A-Z to numbers 1-26 instantly. This letter to number translator uses the A1Z26 cipher to transform alphabetical characters into their corresponding numeric positions. Convert words to numbers by mapping each letter to its alphabet position (A=1, B=2, C=3, etc.).

Text to Hex

Convert text to hexadecimal values using UTF-8 encoding. This Text to Hex converter transforms plain text into hexadecimal representation using 8-bit ASCII encoding for each character.

Hex to Text

Decode hexadecimal values back into readable text instantly. This Hex to Text converter reads byte pairs and converts them back to UTF-8 text for debugging, learning, and data inspection.

Text to Binary

Turn text into binary bytes instantly using 8-bit ASCII encoding. Convert letters to binary online with our free tool. This Text to Binary converter is useful for learning, debugging, and working with binary representations of text.

Text to Base64

Encode text into Base64 safely. This Text to Base64 converter transforms plain text into Base64-encoded strings using UTF-8 encoding for secure data transmission.

Supporting guides

Text to Hex: Fast UTF-8 Examples for Developers

Understand how text maps to bytes and hex values with clear UTF-8 examples you can copy and test.

Understanding Text Encoding: UTF-8, Base64, and More

Learn the fundamentals of text encoding and how different schemes impact storage and transport.

Conversion History

FAQ

How do you translate binary to English?

Split the binary into groups of eight digits, convert each group to its decimal value, then look that value up as a character code. 01001000 is 72, which is "H". This translator does all of that automatically — paste the binary, set Direction to decode, and the text appears.

Why does my binary not decode?

Almost always because the total number of 0s and 1s is not a multiple of eight, which means a digit is missing or duplicated. The tool reports the exact bit count so you can find the gap. It also ignores spaces and line breaks, so formatting is never the problem.

What is the difference between UTF-8 and ASCII here?

ASCII uses one byte per character and only covers basic English. UTF-8 covers every character but uses two to four bytes for anything outside that basic set. If your text contains accents, emoji, or non-Latin scripts, use UTF-8 — ASCII will mangle them.