Came to ask the same thing. Save CyberChef for offline use and it does way more than this.

One strong advantage of CyberChef is being cross platform. I use it regularly on my Linux machine at work.

DevToys is Windows only.

Or https://it-tools.tech

That's so interesting, GCHQ! I don't know if that makes me trust it more or less than other random code online. (It's a little like installing some nice free software from the friendly people at the NSA, in case you're unfamiliar.)

I did have a quick look at the repo, in case there were some useful security practices I could learn from. But it's just your standard NPM dependencies with a 20K-line package-lock.json. I wonder if perhaps they don't use it internally. Or if they do, perhaps they shouldn't.

Nice try 4 letter agency, but seriously doesn't look like it's phoning home, unless there is check for opened devtools in browser ;).

My first question was, "Why wouldn't this be a web application?"

Honestly though, this looks nicer than CyberChef

wow! I didn't know how badly I wanted this. Thanks!