Free LUT Analyzer
Drop a .cube file to get instant quality metrics, RGB curves, hue linearity, and saturation maps. 100% client-side — your files never leave your device.
Drag & drop a .cube file here
or click to browse
Analyzing...
Quality Score
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Metrics
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Percentage of sRGB gamut preserved
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Output when input is pure black
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Output when input is pure white
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Max color shift on grays (lower = better)
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Max jump between adjacent entries
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Percentage of entries with no effect
Granger Rainbow
Drag to compare original (left) vs LUT-transformed (right). Top half: saturation gradient. Bottom half: brightness gradient.
RGB Transfer Curves
Per-channel response along the neutral axis (R=G=B input).
Hue Linearity
Hue shift (degrees) across the spectrum at S=1, V=0.8. Flat = linear, spikes = hue distortion.
Saturation Response
Vectorscope — dashed rings show input saturation levels, colored rings show LUT output. Deformation reveals hue shifts and saturation changes.
Per-zone analysis — saturation change when hue is preserved, or hue shift detected when colors are remapped
Saturation Ratio Heatmap
HSV saturation ratio (output/input) by hue and brightness. Red = boost, blue = reduction, white = no change. Contour at 1.0 (identity).
Import optimized LUTs into DeluxeFX
Professional 10-bit color grading on iPhone. Import your own .cube LUTs and apply them in real-time.
Download on the App Store