Online 3D LUT visualizer for .cube, .3dl and Hald CLUT files
Load your own LUT, apply it to controlled test images, inspect RGB curves, and rotate a 3D color cube to see how colors move. Everything runs locally in your browser.
Local processing: LUTs and images are parsed and rendered in your browser. They are not uploaded.
Supported LUT formats
The inspector accepts common 3D `.cube` files, whitespace/table-style `.3dl` files, and Hald CLUT image files that browsers can decode, especially PNG Hald images. 1D LUTs and TIFF Hald files are outside the first version.
How to read the visualizations
The curves show channel response from dark to bright inputs. The cube shows sampled RGB points moving from their identity positions toward transformed positions as the blend slider changes.
Private browser processing
Your LUT and optional uploaded image are decoded with browser APIs and rendered to canvas. The feedback form sends only the message you type; it does not attach LUT files or images.
FAQ
Are LUT files uploaded? No. LUTs and optional test images are processed locally in your browser.
Which LUT formats are supported? The visualizer accepts common 3D `.cube` files, whitespace/table-style `.3dl` files, and browser-decodable Hald CLUT images such as PNG.
Why use test charts? HSL gradients and color circles reveal clipping, hue bends, channel contamination, and contrast changes more clearly than many photos.
Can I use production images? Yes. Upload a local JPEG, PNG, or WebP. It remains local to the browser.
What do the curves and 3D cube show? Curves show sampled RGB response, while the cube shows how color points move from identity positions into the LUT-transformed volume.
Can this export LUT files? No. Use LUT Converter when you need to convert or export `.cube`, `.3dl`, or Hald PNG files.
Which software supports LUT files? Common LUT-capable tools include DaVinci Resolve, Adobe Premiere Pro, Final Cut Pro, Photoshop, Affinity Photo, OBS Studio, and VFX tools that use OpenColorIO. Check each app’s documentation because supported LUT formats and color-management assumptions differ.