What is a .cube LUT file?

A .cube file is a 3D lookup table: a grid that maps every input RGB colour to an output colour. Your editor reads it and applies the same colour transform to every pixel of your footage. ChromaMimic exports the Adobe Cube v1.0 format, which DaVinci Resolve, Premiere Pro, Final Cut and Photoshop all read.

Is ChromaMimic free, and do my images get uploaded?

ChromaMimic is free to use: grade and preview with no account. A free account gives you 3 downloads per month, and ChromaMimic Pro ($5/month or $39/year) unlocks unlimited downloads, Wheel mode and 65³ LUTs. The colour engine runs entirely in your browser, so your frames never leave your machine.

What do I get with ChromaMimic Pro?

ChromaMimic Pro is $5/month or $39/year with a 7-day free trial. It unlocks unlimited downloads in every format, Wheel mode for full colorist-style colour grading, 65³ high-precision LUTs, and a saved LUT library. Cancel anytime.

Can I export a .dng LUT or graded .dng?

Yes. Alongside the .cube 3D LUT, ChromaMimic exports a 16-bit linear .dng of the graded still for Lightroom, Camera Raw and Capture One, plus a .png and an .xmp preset. The .cube carries the full reference match; the .xmp carries the grade only.

What is the best free AI colour grading LUT maker?

ChromaMimic is a free AI colour-grading LUT maker that runs in the browser with no account and nothing uploaded, exporting .cube and .dng for DaVinci Resolve, Premiere Pro and Final Cut. Unlike most AI LUT tools it processes your frames locally, so it is private and instant; the Pro tier adds unlimited downloads, wheel-mode colour grading and 65³ LUTs.

How do I create a LUT from a reference image?

Drop your original (ungraded) frame and a reference still with the look you want. ChromaMimic measures the colour distribution of both and learns a transform that pushes your frame toward the reference, then writes it out as a .cube LUT you can load in any major editor.

Why does my LUT look flat or wrong on S-Log3 footage?

Matching works in display colour (sRGB / Rec.709). If your footage is log (S-Log3, V-Log, LogC), convert it to Rec.709 with a Color Space Transform first, then apply the LUT after that node. Building the match from log frames measures colour in the wrong space and looks flat.

Which LUT size should I export, 17, 33 or 65?

33 is the standard and the most compatible choice. 17 is smaller and faster. 65 is the highest precision, but some older Premiere Pro builds reject LUTs above 33, so rebuild at 33 if a 65 LUT will not load.

ChromaMimic — AI Colour-Grading LUT Maker

ChromaMimic — Free AI Colour-Grading LUT Maker ChromaMimic is a free, browser-based AI colour-grading LUT maker. It matches any film look from two frames (an original and a reference still) and exports a downloadable .cube or .dng LUT for DaVinci Resolve, Premiere Pro and Final Cut. The colour engine runs entirely in your browser, so nothing is uploaded. How to create a LUT from a reference image

Load your original (ungraded) frame.

Load a reference still with the look you want.

Build: ChromaMimic learns the colour transform automatically (optimal transport, histogram and Reinhard matching).

Refine with grade controls, then export the .cube or .dng.

What you can export

.cube — Adobe Cube v1.0 3D LUT for Resolve, Premiere, Final Cut, Photoshop

.dng — 16-bit linear graded still for Lightroom, Camera Raw, Capture One

.png — graded still; .xmp — Lightroom / ACR grade preset

Is ChromaMimic an AI LUT generator? Yes, in the practical sense: it automatically learns the colour transform between two frames using colour-science algorithms rather than a generative model, so results are predictable and instant. It is a free, private alternative to AI LUT tools like fylm.ai and lutbuilder.ai, with no login and nothing uploaded. Built by Nunik Co.