Hex encoder / decoder

Encode any text into hex (UTF-8 byte sequence) or decode a hex string back to text. Separator and case configurable.

Features

Converts text to its UTF-8 byte sequence in hexadecimal, and parses hex back to text.
Formats bytes with space, dash or colon separators for readable dumps and MAC-style strings.
Outputs lowercase or uppercase hex to match the format your tooling expects.

How it works

Choose Encode to go from text to hex, or Decode for the reverse.
Paste your text or hex string into the input.
Pick a separator (none, space, dash or colon) and toggle uppercase, then copy the result.

Your files never leave this page

Every conversion runs entirely in your browser using WebAssembly. There is no upload, no server-side processing, no analytics, and no cookies. Open DevTools → Network during the operation and you will see zero outbound traffic.

Related tools

Topics covered

hex encoder online
hex decoder online
text to hex converter
hex to text converter
string to hex online
free hex encoder