Fhex - A Full-Featured HexEditor compatible with Linux/Windows/MacOS

November 19, 2021

This project is born with the aim to develop a lightweight, but useful tool. The reason is that the existing hex editors have some different limitations (e.g. too many dependencies, missing hex coloring features, etc.).

screenshot screenshot2 screenshot3

This project is based on qhexedit2capstone and keystone engines. New features could be added in the future, PRs are welcomed.


  • Chunks loader - Used to load only a portion of large files without exhaust the memory (use alt + left/right arrows to move among chunks). Please note that in chunk mode, all the operations (e.g. search) applies only to the current chunk except for file save (the entire file is saved). However, each time you edit a chunk, save it before to move to another chunk, otherwise you will lose your changes.
  • Search and replace (UTF-8, HEX, regex, reverse search supported) [CTRL + F]
  • Colored output (white spaces, ASCII characters, 0xFF, UTF-8 and NULL bytes have different colors)
  • Interpret selected bytes as integer, long, unsigned long [CTRL + B]
  • Copy & Paste [CTRL + C and CTRL + V]
  • Copy selected unicode characters [CTRL + Space]
  • Zeroing all the selected bytes [Delete or CTRL + D]
  • Undo & Redo [CTRL + Z and CTRL + Y]
  • Drag & Drop....

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