How to use the Text to Binary
1. Type or paste plain text into the input field — the binary conversion updates instantly.
2. Each character is converted to its 8-bit ASCII binary representation, with bytes separated by spaces.
3. Click Copy to copy the binary string to your clipboard.
Tip: capital and lowercase letters produce different binary values — 'A' = 01000001, 'a' = 01100001.
What is it?
Computers store all data as binary — sequences of 0s and 1s. Every character on your keyboard has an ASCII code (a number from 0 to 127), and that number is stored as an 8-bit binary value. For example, 'H' = 72 in ASCII = 01001000 in binary. A space (character 32) = 00100000.
Text-to-binary conversion is a fundamental concept in computer science education, CTF (Capture the Flag) security challenges, low-level programming, and understanding how encoding works at the byte level. It's also used in digital electronics, where binary patterns represent signals and data.
This tool uses JavaScript's charCodeAt() which produces the UTF-16 code unit. For standard ASCII characters (English text, digits, common punctuation), this is identical to the ASCII code. Non-ASCII characters (emoji, accented letters) have code points above 127 and may require more than 8 bits.
Example
Hi!
01001000 01101001 00100001
H = 72 = 01001000 · i = 105 = 01101001 · ! = 33 = 00100001
Benefits
Pass data safely through any protocol
Encoded content — Base64, URL percent-encoding, HTML entities, Unicode escapes — travels through email, JSON, HTTP headers, and databases without corruption.
Decode any encoded string instantly
URL percent-encoding, Base64, HTML entities, Unicode escapes, JWT payloads — decode any format to readable text in one click, no library or script needed.
Copy-paste ready output for any context
Whether embedding content in a URL, HTML attribute, JSON string, or HTTP header — the correct encoding for each destination, immediately.
Eliminate encoding bugs before they reach production
Test encoding and decoding logic interactively with real inputs — catch character encoding mismatches and broken escaping before they cause user-facing errors.
Frequently asked questions
Why is each binary group 8 bits (one byte)?
One byte (8 bits) is the standard unit for storing a single ASCII character. Each byte can hold values from 0 (00000000) to 255 (11111111), covering all 128 ASCII characters and the extended ASCII range.
Does this work for emoji and non-ASCII characters?
Emoji and non-ASCII characters have Unicode code points above 127, which need more than 8 bits. This tool uses charCodeAt() which gives the raw UTF-16 code unit — for characters beyond the Basic Multilingual Plane (code points above U+FFFF), this gives a surrogate pair, not the full Unicode value. Use a dedicated Unicode tool for full Unicode analysis.
What is the binary for a space?
A space character is ASCII code 32, which in 8-bit binary is 00100000.
Why do capital and lowercase letters have different binary values?
The ASCII standard assigns separate code points to uppercase and lowercase. 'A' = 65 = 01000001, 'a' = 97 = 01100001. Notice they differ by exactly 32 (bit 5), which is why toggling bit 5 switches case — a neat bit manipulation trick.
How do I convert binary back to text?
Use our Binary to Text Decoder tool to convert 8-bit binary groups back to readable characters.