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Hex Fiend

A fast and clever open source hex editor for macOS.

Download the latest version from the releases page.

CI

Features

  • Insert, delete, rearrange. Hex Fiend does not limit you to in-place changes like some hex editors.
  • Work with huge files. Hex Fiend can handle as big a file as you’re able to create. It’s been tested on files as large as 118 GB.
  • Small footprint. Hex Fiend does not keep your files in memory. You won’t dread launching or working with Hex Fiend even on low-RAM machines.
  • Fast. Open a huge file, scroll around, copy and paste, all instantly. Find what you’re looking for with fast searching.
  • Binary diff. Hex Fiend can show the differences between files, taking into account insertions or deletions. Simply open two files in Hex Fiend and then use the File > Compare menus.
  • Smart saving. Hex Fiend knows not to waste time overwriting the parts of your files that haven’t changed, and never needs temporary disk space.
  • Data inspector. Interpret data as integer or floating point, signed or unsigned, big or little endian.
  • Binary templates. Visualize the structure of a file through scripting. See documentation.
  • Embeddable! It’s really easy to incorporate Hex Fiend’s hex or data views into your app using the Hex Fiend framework. Its permissive BSD-style license won’t burden you. See the API reference for details.