luthor

luthor is a modern, material you-inspired web app for applying 3D LUTs (.cube files) to images directly in your browser. It features light/dark/system theme support, and instant image processing and download—all with no server or account required.

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features

• material you ui: dynamic, accessible, and responsive design
• theme toggle: light, dark, or system (auto) mode
• drag & drop: upload images and .cube lut files easily
• instant processing: applies 3d luts with trilinear interpolation for smooth color grading
• auto download: processed image is downloaded automatically
• no server: all processing is done in your browser, your files never leave your device
• mobile friendly: works great on desktop and mobile

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usage (windows, mac, linux etc.)

1. clone or download this repo
2. open main.html in your browser (no build step required)
3. upload an image (jpeg, png, webp)
4. upload a .cube lut file
5. click apply lut & download
6. your color-graded image will be downloaded automatically

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usage (on android)

1. clone or download this repo
2. setup an simple web server so your browser can run it locally, i suggest (https://play.google.com/store/apps/details?id=com.phlox.simpleserver)
3. upload an image (jpeg, png, webp)
4. upload a .cube lut file
5. click apply lut & download
6. your color-graded image will be downloaded automatically

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screenshots

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supported formats

• images: jpeg, png, webp
• luts: 3d .cube files (standard format)

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license

mit

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credits

• material you design by google
• icons: material symbols

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