Most hardcore data compression method / offline software?

• libjxl

  84 2,178 9.8 C++

  JPEG XL image format reference implementation

  

But if you are feeling "bleeding edge" you can convert your images to JPEG XL that provides amazing results on lossless and lossy optimization.

• qimgv

  15 2,026 5.7 C++

  Image viewer. Fast, easy to use. Optional video support.

I don't know exactly what you mean by "nothing", but JPEG XL is already supported for almost all image viewers on Linux installing the libjxl plugin system wide, and on Windows good image viewers like XnView, IrfanView e my personal favorite qimgv, and all most used browsers already supports jpeg xl, however is not enable by default and you need to enable it in the hide settings, but I agree that you probably will not want to use jxl if you are sharing images to other people all the time on different platforms and can't bother to decode before doing, or are using it on other devices that don't use a desktop OS, that is way I only recommend it to people that like "bleeding edge" stuff, my first recommendation is still use something like pingo if the original format is a must.

• WorkOS

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  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

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