I haven’t tried DevUtils, but a lot of the features on the landing page look like a more polished version of CyberChef:

https://gchq.github.io/CyberChef/

Wow, just discovered CyberChef, thanks for the link!

DevUtils has a comparison page at [1] describing the differences between both tools. To their credit (I reckon it is rare on such "comparison" pages), they even highlight the features of their competitor that they don't match.

[1] https://devutils.app/devutils_vs_cyberchef/

A Microsoft engineer moonlights on a similar app for Windows. https://github.com/veler/DevToys

I still keep Notepad++ around on my Windows machines because of the all the plugins.

I regularly use the JSTool (for Javascript/JSON), MIME tools (for Base64 and URL encode/decode) and Markdown++ plugins. There is also a NppCalc calculator app.

Looking for something like this on linux.

What about a local running instance of cyberchef ? https://gchq.github.io/CyberChef/

Check out DevBox https://www.dev-box.app/ (I'm the developer) It has most of the utilities of DevUtils and actually more :)