http://www.jemarch.net/poke might be interesting in that case.

I second poke. It's an amazing tool for debugging in general.

It's relatively rare to look into standardized binary formats (you'll likely look directly into a library at that point), unless you're writing a writer/parser/decoder yourself and need to double-check the output.

When developing with general binary data in mind, poke is much more useful.

Kaitai Struct might be a good choice for that: https://kaitai.io/

I've found Kaitai struct to be an absolute joy to use on things like EEPROM dumps from car computers.

Has anyone found anything incredible for arbitrary UTF-8 data?

Honestly, VIM.

Thanks for the link, that’s really cool!

I suppose OTB means “off the bat?” Non-native speaker here, and my web search turned up nothing.

I assume in this case it’s “Out (of) The Box”

Hi, i'm working on runtime kaitai support and have made good process but it's quite a big task. Keep an eye on https://github.com/wader/fq/issues/627 your interested.