Comment by cookiengineer

Came here to reply with ImHex.

It really is by far the best hex editor I ever used, and sooo good for reversing arbitrary binary blobs where you learn incrementally more about its structure while reversing it. The imhex patterns repo [1] also contains so many formats, it makes binwalk almost useless in comparison.

[1] https://github.com/WerWolv/ImHex-Patterns