LUT preview online see your .cube on your own frame before you open the editor.
Applying a LUT swaps every color in the picture for the color the table says, all at once. Load a .cube file, 1D or 3D, plus a photo or a video, pick the frame, compare before and after by dragging the split, set the intensity and download the graded frame as a full resolution PNG.
Free, no sign-upPick a photo or a video, or use the test image, to see the LUT applied.
Before After1. The LUT
2. The image or video
A LUT expects the picture in the color space it was built for. A log conversion LUT (S-Log3, V-Log, C-Log, Apple Log) looks blown out on an image that is already Rec.709.
Your whole video already cut, ready for color in your editor: we deliver it
How to apply a LUT to a photo or video
- 01
Load the LUT
Drop your .cube file, 1D or 3D. If you do not have one, try one of the three looks we built for this tool.
- 02
Pick the frame
Load a photo or a video. For video, slide to a frame that represents the scene well: skin, sky, shadows.
- 03
Compare and download
Drag the split to see before and after, set the intensity and download the graded frame as PNG, at full resolution.
What is a LUT and what is inside a .cube file?
A LUT (Look-Up Table) is a color table: for each input color, it says which color comes out. A .cube file stores that table as text, one color per line, with three numbers from 0 to 1 for red, green and blue. It is the format Premiere Pro, DaVinci Resolve, Final Cut Pro, After Effects, Photoshop and OBS read, which is why it is the most common way to sell and share looks.
A 3D LUT is a cube of colors. With 33 points per axis, the table holds 33 x 33 x 33, or 35,937 colors, and the colors in between are interpolated. Because it mixes the three channels, it changes saturation, hue and contrast together. A 1D LUT is just one curve per channel: it moves brightness, contrast and color balance, but it cannot, for example, push only the greens toward blue.
| Size | Colors in the table | Common use |
|---|---|---|
| 17 points | 4,913 | Monitors and cameras, quick preview |
| 33 points | 35,937 | The standard for looks and conversions |
| 65 points | 274,625 | Precise conversions, large files |
TITLE "My look"
LUT_3D_SIZE 33
DOMAIN_MIN 0.0 0.0 0.0
DOMAIN_MAX 1.0 1.0 1.0
0.012300 0.009800 0.021500
0.043100 0.010200 0.020900
...Why does my LUT make the image blown out or washed out?
It is almost always the right LUT on the wrong image. There are two kinds. A technical, or conversion, LUT turns footage shot in log (Sony S-Log3, Panasonic V-Log, Canon C-Log, iPhone Apple Log) into a normal Rec.709 image. A creative LUT gives a look to an image that is already normal. Putting a conversion LUT on a regular phone video makes everything harsh and oversaturated.
Order matters too. In the editor, the log conversion comes first, then exposure and white balance, and only then the creative look. Here you see one LUT at a time. If the look was made for log, test it on a log frame; if it was made for Rec.709, test it on a photo or a regular video.
- Flat, grey image: log footage without its conversion LUT.
- Blown out, harsh image: a conversion LUT on video that was already normal.
- Skin too orange: lower the intensity or fix white balance first.
How do you apply a LUT in Premiere, DaVinci and Final Cut?
In Premiere Pro, open the Lumetri Color panel: a conversion LUT goes under Basic Correction, in Input LUT, and a creative look goes under Creative, in Look, with its Intensity control. In DaVinci Resolve, copy the .cube into the LUT folder using Open LUT Folder in the project settings, refresh the list and right-click the node to pick the LUT. In Final Cut Pro, use the Custom LUT effect and choose the file.
Testing here first saves time: you see the look on your own footage, compare it with the original and decide the intensity without opening the project. The intensity here works like Lumetri's: it blends the original image with the graded one, from 0 to 100%.
Does the downloaded PNG match the editor?
Very closely. The frame is graded at full resolution and saved as PNG, with no lossy compression. Between the points of the cube we use trilinear interpolation, the most common kind. Editors that use tetrahedral interpolation may differ by one or two levels on some pixels, a difference you cannot see.
For video, the downloaded frame is the one you picked with the slider. Use the PNG to show the look to a client, build a color reference for your team or compare two LUTs side by side before the grading session.
More than a LUT. Your video cut, ready for color.
Frequently asked questions
How do I open a .cube file?
A .cube is a text file, so any text editor opens it, but you only see numbers there. To see the effect, drop the file here along with a photo or a video: the LUT is applied right away and you compare before and after.
Can I apply a LUT to a photo?
Yes. Load the photo as JPG, PNG or WebP, apply the .cube and download the result as PNG at the photo's resolution. Many looks made for video work well on photos, as long as the photo is in the same color space, usually Rec.709 or sRGB.
What is the difference between a 1D and a 3D LUT?
A 1D LUT is one curve per channel: it adjusts brightness, contrast and color balance, but each channel changes on its own. A 3D LUT is a cube that mixes the three channels, so it changes the saturation and hue of specific colors. Film looks and log conversions are almost always 3D.
Which LUT size is best: 17, 33 or 65?
33 points is the standard and covers almost everything. 65 points is more precise for technical conversions, with a file about eight times larger. 17 points shows up in monitors and cameras, where memory is tight. All three work here.
Does it work with log LUTs like S-Log3 or Apple Log?
Yes, as long as the frame is in log too. Load a video shot in the log profile and the camera's conversion LUT: the frame comes out in Rec.709. On a regular video, the same LUT blows the image out, because it expects the flat log picture.
Where do the sample looks come from?
We built the three looks for this tool: Warm, Teal and orange, and Black and white. They are 33 point cubes made to show how a LUT behaves. For real work, use your camera's LUT or your colorist's look.
Your long video becomes ready clips. The color stays with you.
Send the video. We transcribe it, find the best moments and deliver captioned clips, or the timeline built for Premiere, DaVinci and Final Cut.
See the result on your own recording before adding a card.