Heme is a fast and portable console hex editor. It has undo support, ability to fill a range of addresses with the specified byte, ability to search for a single byte or character string.

Offsets can be given in hexadecimal, octal or decimal. There are two editing modes: hex and ascii. In hex mode you type hexadecimal digits and in ascii mode you type characters. In ascii mode the cursor is automatically moved to the next byte after typing a character.