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littlekit.app
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Text to binary

Convert UTF-8 text to binary byte groups and back, with live output and a byte-by-byte hexadecimal inspector.

0 / 100,000 characters

Binary bytes

Your conversion appears here as you type.
0 output characters
Inspect UTF-8 bytes

0 bytes · each block below is one byte in hexadecimal.

Processed on your device

How it works & useful details

How to use this tool

Type text to see 8-bit UTF-8 byte groups. Switch direction or Swap to decode the bits back into text.

Details and limits

Binary input must contain complete groups of 8 bits, with optional ASCII spaces, tabs, or line breaks. Unicode characters can occupy multiple bytes. Invalid UTF-8 bytes are rejected.

Up to 100,000 input code units and 1,000,000 output characters; live preview up to 8,000 input characters.