“Hi”
Binary 01001000 01101001, hex 48 69, decimal 72 105.
Text to Binary Converter
Convert text to binary, hex, decimal or octal bytes and back, using UTF-8.
Runs in your browser — nothing you enter is sent to a server.
How the Text to Binary Converter works
Choose Text → codes to see each byte of your text in binary, hexadecimal, decimal or octal, or Codes → text to decode bytes back into text. Codes can be separated by spaces or commas; unseparated binary and hex are split into bytes automatically.
Text is encoded as UTF-8, the standard on the web. Plain English letters take one byte each (the same as ASCII), while accented letters, other scripts and emoji take two to four.
Formula
8 bits = 2 hex digits = a number from 0 to 255
H is byte 72: 01001000 in binary, 48 in hex, 110 in octal.
Examples
é and 👍
é is 2 bytes: 11000011 10101001. 👍 is 4 bytes: F0 9F 91 8D.
Frequently asked questions
Is this the same as ASCII?
For English letters, digits and punctuation, yes — UTF-8 matches ASCII for those 128 characters. Other characters use more bytes.
Why does decoding say the bytes aren't valid UTF-8?
A multi-byte character is incomplete, often because a byte was left out when copying. Check that you pasted every code.
How do I convert a number, not text, to binary?
Use the Number Base Converter — this tool converts characters, so “5” becomes the byte 00110101.
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