Apps similar to File Peek include ImHex, which is free and open source. Other options are HxD, wxMEdit, Hex Fiend and wxHexEditor. You're spoiled for choice with Hex Editors like File Peek: we list more than 50 alternatives for Windows, Linux, Mac, Android and the web.
DHEX is a more than just another hex editor: It includes a diff mode, which can be used to easily and conveniently compare two binary files. Since it is based on ncurses and is themeable, it can run on any number of systems and scenarios.
McAfee FileInsight, developed by McAfee Labs, is an integrated tool environment for website and file analysis. Its many built-in editing and analysis features can be easily extended through simple Python-based plugins.
Tweak is a hex editor. It allows you to edit a file at very low level, letting you see the full and exact binary contents of the file. It can be useful for modifying binary files such as executables, editing disk or CD images, debugging programs that generate binary file formats...
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HextEdit is a fast and lightweight hex editor for viewing and editing binary data. Quickly edit virtually any file type at a low level in a simple and native app. It features fast incremental find, a byte inspector and generally fast performance as a native app.
As the name implies, this is a hex editor. It aims to be a good general-purpose hex editor and to have a wide selection of features for analysing and annotating binary file formats.
The Hex Editor From Hell! Hecate is a terminal hex editor that, instead of putting the (ASCII) representation of bytes way out on the right side of the screen, it puts the interpreted values directly beneath the hex representation.
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