Hex Editor

Use this editor to create, view, or modify a string of bytes using hexadecimal or ASCII notation.

Address
Shows the offset (location) of each line in the byte string. The offset is the number of bytes from the beginning of the string. It is shown in hexadecimal (digits 0-9, letters A-F). Each line can contain 16 bytes. You can't edit this column.

Hex
Use this area to create or edit the byte string using hexadecimal notation. Only hexadecimal input (digits 0-9, letters A-F) is allowed. As you edit, the byte string is displayed in ASCII characters in the Ascii area. Each ASCII character corresponds to two hexadecimal digits (one byte).

• To insert a byte, move the cursor to the desired insertion point and type two hexadecimal characters.
• To delete a byte, move the cursor to the byte and press Del, or move the cursor to the next byte and press Backspace.
• To modify a byte, delete the byte and then type the new byte. Or, press Insert to switch into typeover mode, move the cursor to the byte, and then type the new byte.

Ascii
Use this area to create or edit the byte string using ASCII notation. As you edit, the byte string is displayed in hexadecimal notation in the Hex area. Each ASCII character corresponds to two hexadecimal digits.

• To insert a byte, move the cursor to the desired insertion point and type an ASCII character. The numeric value of each ASCII character is used. Some byte values are outside the ASCII range and thus cannot be entered in this area. To enter such byte values, use the Hex area.
• To delete a byte, move the cursor to the byte and press Delete, or move the cursor to the next byte and press Backspace.
• To modify a byte, delete the byte and then type the new byte. Or, press Insert to switch into typeover mode, move the cursor to the byte, and then type the new byte.

Data Size
Shows the current length, in bytes, of the entire string.

Offset Dec
Shows the current offset (position) of the cursor in decimal. The offset is the number of bytes from the beginning of the string.

Offset Hex
Shows the current offset (position) of the cursor in hexadecimal (digits 0-9, letters A-F). The offset is the number of bytes from the beginning of the string.

Mode
Shows which mode the editor is in. Possible modes are Insert, Typeover, and Read-Only. In Read-Only mode you can view but not edit the byte string. If you aren't in Read-Only mode, you can switch between Insert and Typeover modes by pressing the Insert key.

• Hex Editor Keystrokes

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