Text to hex, binary & decimal

Convert text to hexadecimal, binary or decimal byte values and back. UTF-8 aware and processed locally.

Runs in your browser · nothing is sentEncoding

Input typeHex

48 65 6c 6c 6f

Binary

01001000 01100101 01101100 01101100 01101111

Decimal

72 101 108 108 111

About this tool

Choose your input type and see the other representations immediately. Characters outside ASCII are shown as multiple UTF-8 bytes.

🔒 Your input stays in your browser and is never sent anywhere.

Why does one character give several bytes?

In UTF-8, characters beyond basic ASCII (such as é or emoji) use 2 to 4 bytes.

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