v1.0.29

1.0.29.0 - 2026-07-21

• Added a Windows-style image context menu with Save As, Copy, Copy as Path, File Info, and recycle-bin Delete actions, including the matching keyboard shortcuts. Copy publishes both bitmap and storage-item clipboard formats for direct pasting into PowerPoint, File Info toggles the existing inspector without replaying its show animation, and deletion safely selects an adjacent image or clears the viewer when no images remain.

Install

1. Download HdrImageViewer-1.0.29-win-x64-portable.zip.
2. Extract the zip to a normal folder, for example C:\Apps\HdrImageViewer.
3. Run HdrImageViewer.exe.

Requires the x64 .NET 10 Desktop Runtime and Windows App Runtime 2.2. No certificate installation is required for the portable zip. Windows may show a SmartScreen warning because this GitHub build is unsigned.

Recommended Install

For most users, install the Microsoft Store version so Windows handles signing and updates.

Optional Format Tools

Most common formats work out of the box. JPEG XL preview and some HDR export formats use external command-line tools when they are available.

Install optional tools with MSYS2 UCRT64:

winget install --id MSYS2.MSYS2 --source winget
C:\msys64\usr\bin\pacman.exe -Syu --noconfirm
C:\msys64\usr\bin\pacman.exe -S --needed --noconfirm mingw-w64-ucrt-x86_64-libjxl mingw-w64-ucrt-x86_64-libavif mingw-w64-ucrt-x86_64-libheif

Restart HDR Image Viewer after installing. The app auto-detects tools in C:\msys64\ucrt64\bin and also checks PATH.

• JPEG XL preview: jxlinfo.exe and djxl.exe from libjxl.
• JPEG XL / AVIF / HEIC HDR export: cjxl.exe, avifenc.exe, and heif-enc.exe when installed.
• Ultra HDR JPEG export: advanced users can place ultrahdr_app.exe on PATH.