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PNG image format receives HDR and animation support in first spec update in decades
(www.techspot.com)
this post was submitted on 29 Jun 2025
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Yeah from a quick glance over the spec it's basically just small clarifications, promoting existing extensions (EXIF and APNG) to the core spec, and adding the new HDR metadata chunks.
The HDR stuff will be hit or miss, it's backwards compatible in the sense that a viewer that doesn't understand it will fall back to the ICC profile, but that still requires the viewer to support the (now deprecated) ICC based HDR method. If it doesn't support HDR at all then you're just out of luck since these images just require fundamentally different ways to view them.