GNU hexedit vs HexEd.it

GNU hexedit is a free Linux terminal program for viewing and editing file contents as hexadecimal values or ASCII text. It can read a device piece at a time, search forward or backward for strings in either representation, and save edits. Selection commands allow marking, copying, pasting, saving a copied region to another file, and filling a selected area with a string. The --sector option displays whole sectors and makes scrolling advance sector by sector. Keyboard commands control the terminal interface; --color works only when supported by the operating system. Changes remain in memory until saved, so large fill operations may trigger a warning. Read-only files cannot be changed and are reported as non-writable. The author describes hexedit as open source under the GNU General Public License. The maker page links to source archive 1.6, while Git builds use ./autogen.sh && ./configure && make. It supports disk editing but has no binary comparison, templates, scripting, or plugins.

HexEd.it is a browser-based editor for inspecting and changing binary files and hexadecimal data. Processing takes place in the browser, and the site says it does not send file data to its server. Once the app has been downloaded during a first visit, it can also work offline. Analysis and editing tools include viewing data in multiple numeric formats, bit-wise changes, search and replace, bookmarks, and multiple selections. HexEd.it can decode and encode Motorola S-Record and Intel HEX files, and identify more than 20,000 file types. Its hash lookup can query Google, VirusTotal, MetaDefender Cloud, BitBaan MALab, and Hybrid Analysis without uploading the file. The feature page says it can process files up to several terabytes; the manual reports testing on files up to 150 GiB. The site lists HTTPS, a restrictive Content Security Policy, Feature Policy, and Subresource Integrity as security measures. It is free for commercial and non-commercial use, but the maker says it is not open-source.