Apply a LUT online

A 3D LUT maps each red, green and blue coordinate to a new colour. Most photographs sit between the recorded grid points, so this tool interpolates between the eight surrounding samples instead of snapping a pixel to its nearest entry. The result is the transform written in your file, blended with the original only when you lower strength.

The parser accepts the common LUT_3D_SIZE, LUT_1D_SIZE, DOMAIN_MIN, DOMAIN_MAX and TITLE fields. It verifies that the cube contains exactly the promised number of samples before touching the photograph.

An Autodesk / Lustre .3dl works too: the grid line at the top (or the row count) gives its size, the largest value gives its bit depth (10, 12 or 16 bits), and its blue-first rows are turned into the same table a .cube makes. If a file’s name or notes suggest it was made for log camera footage (S-Log, LogC, C-Log, V-Log and the like), the page says so before you judge the result.

Trilinear interpolation is the method in use. We measured tetrahedral against it on every built-in look and found no visible difference — the numbers are in the interpolation record.

• A LUT expects a particular input colour space. A log-camera LUT applied to an ordinary sRGB JPG may look extremely contrasty because the input is not what its author designed for.
• This browser workflow reads the displayed RGB values. It does not interpret ICC profiles or convert camera RAW data.
• A saved JPG carries the camera, lens, focal length, exposure and date across from the original, and the location tags are removed on the way; it is also tagged sRGB. PNG and WebP carry no capture data.

• Photo filtersFifty-six looks shelved by family, compared four at a time and built into recipes, every thumbnail drawn from the photograph you opened.
• Film looksThe eight emulations on their own, with what each one does to skin written down.
• Batch filtersRun one named look across up to forty pictures and collect the full-size results in a ZIP.
• A look versus an effectOne test that sorts any filter you meet into the two kinds, and says which kind this site does.