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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.

Whether you call it binary converter or string to binary, this free tool handles it instantly in your browser.

Online binary encoder tool for converting text into binary code representation.

3 chars1 words
3 characters, 1 words

Options

Live preview
01000001 01000010 01000011

Example usage

Example input

ABC

Example output

01000001 01000010 01000011

Batch Processing

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

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.

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How it works

  • Text is read as UTF-8 bytes.
  • Each letter is converted to an 8-bit binary string.
  • Spacing separates bytes for quick reading.

Use cases

Explain binary to students.
Debug encoding issues.
Create binary art.
Convert letters to binary for encoding and cryptography.

From letters to bits: what the 0s and 1s mean

Each group of eight binary digits is one UTF-8 byte. The letter "h" is 01101000 — the binary form of 104, its ASCII value. Capital and lowercase differ by exactly one bit (the 32s place): "H" is 01001000 while "h" is 01101000. That single-bit relationship is why case-insensitive comparison is cheap for computers, and it is a nice detail to spot when reading binary by eye.

Multi-byte characters expand the same way they do in hex: é becomes two eight-bit groups, emoji four. Every modern text pipeline — files, networks, memory — ultimately stores exactly these bytes; this tool just shows them.

Reading binary like a decoder

To decode by hand, split into 8-bit groups and add up the place values (128 64 32 16 8 4 2 1) for each 1-bit. 01000001 = 64+1 = 65 = "A". Shortcuts: bytes starting 010 are capital letters, 011 lowercase, and 0011 digits. Binary-to-text puzzles in escape rooms and CTFs nearly always use this straight ASCII mapping, so these three prefixes crack most of them at sight.

Encoding

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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

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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.
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Conversion History

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FAQ

How do I convert letters to binary online?

Simply type or paste your letters into the converter above. Each letter is automatically converted to its 8-bit binary representation. For example, "A" becomes "01000001". The tool processes all letters instantly and displays the binary output.

Is unicode supported?

Yes, the text is encoded as UTF-8 bytes first.

Can I remove spaces from the binary output?

Yes! Enable the "Remove spaces" option to get continuous binary output without spaces. This is useful when you need compact binary strings for programming or data storage.