Convert dds to heif
A browser can't do this one — here is what it can do.
Desktop app only
Nothing that runs in a tab can write heif from dds. This pair is waiting on the desktop build, which hands the job to the real command-line tools.
Browse what does workAbout DDS
DirectDraw Surface
Microsoft's DirectX texture container. It usually stores GPU-compressed data (the DXT or BCn formats) with mipmaps, so a graphics card can load it without decoding. Convert to DDS for game textures and mods; convert from it to view or edit a texture.
About HEIF
High Efficiency Image File Format
An MPEG container standard (ISO/IEC 23008-12) from 2015 for single images and image sequences. It can hold HEVC, AV1 or other codecs, along with depth maps and bursts. Convert HEIF to JPG or PNG for apps and sites that cannot read it.