On: H.264 is Magic (2016)

[webmobdev]

JPEG2000 is a good option for lossless compression. JPEG XL seems to offer better result and improvements now, but it isn't yet mainstream and has competition.

[AuryGlenz → webmobdev]

Have you ever tried to open/save JPEG2000s in Photoshop? It's ridiculously slow compared to pretty much anything else.

Plus, it doesn't really matter when I can't deliver files to clients in that format.

[webmobdev → AuryGlenz]

I use the J2K photoshop plug-in - https://www.fnordware.com/j2k/ . And even macOS Preview supports JPEG2000 (HEIF on macOS on the other hand is not suitable for professional graphic works; doesn't work with CMYK).