Hex Fiend is a fast, lean, and powerful hex editor built just for the Mac.

- 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.

- 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.

- 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.

Ratings and Reviews

4.9 out of 5
19 Ratings

19 Ratings

ChristianSinger ,

Works Great!! Thank you

Simple but powerful and free. Thank you for the work you put into this to share. Exactly what I need to compliment my other text and file editors when I need to get down to the bit level to see what is going on.

VRajiv ,

Get the latest from developer’s website

The version on app store is not the latest and had bugs - e.g. I couldnt print or it hangs if I do File | Page Setup. I tried the latest and was able to print. Other than this I haven’t played enough with it yet to give a comprehensive review but it seems to have all the right options/bells/wistles that I expect.

John Joyce ,

The Great Original !!

Finally, the great original HexFiend is on the Mac App Store. No more stolen copies of the code, but instead the original from the originator. This is the real deal.


Peter Ammon
1.2 MB

OS X 10.6.6 or later, 64-bit processor



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.