Windows or DOS program with text extractor, bit editor, search, and multi-level undo.

Windows program that includes complete online help and requires less than a megabyte of hard disk space.

A multiplatform binary data editor with support for user defined structures. Requires Java. [Windows, Linux, MacOS]

A hex editor in which you can write REXX script to do whatever modification you want. [Public domain]

Hexadecimal file editor for Microsoft Windows, view and edit any type of file, no matter what format it is saved in. Has maximum file size limit of 4Gb.

Small Windows executable that supports large file size, drag-and-drop editing, and direct editing of binary values. [Open Source]