Hex Fiend

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.