• 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 launches instantly even with huge files. It does not need to keep your files in memory.
• 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.
• Data inspector.  Interpret data as integer or floating point, signed or unsigned, big or little endian...
• Embeddable!  It’s really easy to incorporate Hex Fiend’s hex or data views into your app.  Its permissive BSD-style license won’t burden you.

Hex Fiend 2.18

macOS 10.14.6+