LUT Applier

No. Parsing the .cube file and applying it happen entirely in your browser using the canvas API - your files are never sent to a server.

A lookup table (.cube file) that maps each input color to a new output color, used to apply a consistent color grade - the same technology used in film and video color grading.

The standard 3D .cube format (a LUT_3D_SIZE table), the most widely used format exported by color grading software like DaVinci Resolve and Adobe products. A file that only defines a 1D LUT (LUT_1D_SIZE) - a simpler, less common variant used for basic gamma or exposure adjustments - is rejected with a clear message rather than silently mishandled, since applying 3D-LUT logic to it would produce a wrong result.

Yes - an intensity slider blends the fully graded result over the original image, so 100% is the full look and 50% is half strength. Dragging the slider is instant: only switching interpolation mode re-runs the per-pixel color lookup.

Trilinear interpolation blends between the eight nearest points in the LUT's 3D color grid for a smooth result, and is the right choice for almost every image. Nearest snaps each pixel to its single closest grid point instead - faster, but it can show visible banding on a coarse LUT, which is sometimes useful for checking the raw resolution of a LUT you are building or debugging.

Any size, but images over 4096px on the long edge are scaled down to fit before processing, to keep the per-pixel color lookup fast in the browser - you'll see a note confirming the size used.

Whatever format you uploaded - a JPEG stays a JPEG, a PNG stays a PNG, and a WebP stays a WebP. The graded result is downloaded with the same file type as the original, just with "-graded" added to the filename.

Yes - there is no sign-up, no watermark, and no limit on how many images or LUTs you apply. Because processing happens in your browser rather than on a server, there is also no upload wait.