Please recommend me a good FOSS QR code generator

Ideally I am looking for something cross-platform (web/Android/iOS), but I will settle for separate services if they are good and trustworthy. Although I have never needed a QR code generator, I just realized an extremely helpful use for it, hence now I need one.

I found this one by OpenSourceToolkit which is web based:

OpensourceToolkit

QR Code Generator - Create Custom QR Codes | OpenSource Toolkit

Generate QR codes for text, URLs, WiFi, contacts, and more. Customize colors, size, and error correction. Download as PNG with real-time preview.

Can I trust it?

I’m just asking for recommendations from the community because I want to make sure the generator I use is trustworthy, as I will be using it under unique circumstances to share passwords and other types of very sensitive information.