Bū tools
LUT tester
Logs, LUTs and looks, side by side.
What it does
Tests LUTs on an image in log: a conversion LUT (log → Rec.709) and a look, mixed and matched, with a before / after split.
How
- Image: the test scene (a color chart, skin, a very bright window, a grey scale from −5 to +5 stops) encoded in S-Log3, LogC3, V-Log, C-Log3, F-Log, N-Log, Apple Log or Rec.709; or your photo (a frame grab of your footage, for example).
- Conversion: brings the log back to Rec.709. Pick one that doesn’t match the image to see what a wrong LUT does.
- Look: a creative LUT on top, with its strength.
- Import your .cube LUTs (1D or 3D): they show up in Conversion and in Look. Export gives one .cube with the conversion, the look and its strength, for Resolve, Premiere or Final Cut.
- Drag the line on the image to move the before / after split.
- The waveform under the image shows, column by column, the brightness of each pixel from 0 % (black) to 100 % (white): log sits squeezed in the middle, a Rec.709 image spreads out. It follows the before / after split.
Good to know
The test scene is computed, then encoded with each manufacturer’s published curve and gamut: it behaves like real footage, with a bit less latitude than a real camera. The tool’s LUTs are computed too, free to use. Nothing leaves your device.
Free, no account, nothing is sent: it runs in your browser, even offline.
Related tools
All tools · Français
