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HDRView

github.com/wkjarosz/hdrview Image Tools Open-source projectOpen source

HDRView supports examining and comparing high-dynamic-range images through a dedicated viewer.

Visit HDRView 24 alternatives
github.com/wkjarosz/hdrview
HDRView homepage screenshot

About HDRView

HDRView is an open-source, research-oriented image viewer for examining and comparing high-dynamic-range (HDR) images. It runs on macOS, Linux, and Windows. A browser version is also available, but it is slightly limited, and the desktop build provides all features. The viewer is built to inspect image values, color spaces, and metadata, and to show how two images differ. Where it has to assume a file's color, it states the assumption and lets the user override it.

HDR output depends on the platform. On macOS, Windows, and Linux under Wayland, HDRView queries the display and converts to its HDR range. On Linux under X11 and in the browser build, output is SDR only.

Key features

  • Per-pixel numeric readouts, with a pixel grid shown when zoomed in
  • Watched pixels that show current, reference, and composite values at pinned points
  • Rectangular selection statistics: min, max, average, standard deviation, NaN and infinity counts
  • Comparison of two images through nine selectable blend modes
  • Named gamut, illuminant, and transfer-function overrides for color interpretation
  • Support for gainmap HDR images from recent phones, including JPEG, HEIC, AVIF, and UltraHDR
Best for: Researchers and others who examine HDR renders or images and need to compare variants and check their values and color data.
Good for
  • Open source, with the source code available in a public GitHub repository
  • Runs on macOS, Linux, and Windows, with a desktop build offering all features
  • States which color assumption it made for a file and lets the user override it
Watch out for
  • The browser version is slightly limited and has no HDR output path
  • On Linux under X11, HDR output is not available; output is SDR
  • HDR output depends on platform support for display color queries

HDRView at a glance

Type
Open-source project
Pricing
Not confirmed. Check the site
Open source
Yes · Source code
Language
English
Last checked
Oct 6, 2026 · Online when checked
Listed
Oct 5, 2026
open sourcemacosresearchimage tools

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HDRView FAQ

Are annotations saved into the image pixels?
No. Annotations such as rectangles, arrows, and text are view state and are never rasterized into the pixels. They can be drawn over an image that a renderer is still writing to.
Does HDR output work on every Linux setup?
HDR output on Linux uses the Wayland wp_color_manager_v1 protocol through a patched GLFW. On X11, output is SDR.
What happens when a file's color information is unclear?
HDRView says which assumption it made about the file's color and lets the user override it, including gamut and transfer-function settings.
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Listing maintained by Chris McClure and the WebIndexly editors · Updated Oct 12, 2026 · How we rank