Dataescher HexEditor vs Hex Fiend

Dataescher HexEditor has no write-up on Specifiction yet; its figures are above.

Hex Fiend is a free, open-source hex editor for macOS that can insert, delete, rearrange, and overwrite binary data. It can search large files and compare them while accounting for insertions and deletions. The editor does not keep files in memory or require a full file to be loaded. Its smart saving avoids rewriting unchanged portions and does not require temporary disk space. The maker says it can handle files as large as users can create and reports testing files up to 118 GB. A data inspector interprets values as signed or unsigned integers and floating-point numbers in big- or little-endian formats. Scripted binary templates visualize file structure, and an embeddable framework provides hex and data views under a permissive BSD-style license. The official site lists version 2.18.1 and requires macOS 10.14.6 or later. The Mac App Store distribution collects no data and makes no network requests; the direct-download distribution checks for updates without collecting or storing user data. Hex Fiend is notarized for macOS 10.14 and later.