ToneLoupe is a floating loupe for your Mac. Drag it over any image on screen — your NLE, your photo editor, even a browser — and it reads the pixels underneath in real time. No plugins, no signal chain, no export.
The loupe analyses only the region under it, on the GPU, at up to 30 fps — light enough to leave on all day.
Pixels sitting on the vectorscope skin-tone line read yellow. Drift toward green or magenta shows up the moment it happens — on the face itself, not in a corner of your eye.
Luminance mapped to a false-color scale with the skin target on the yellow band and clipping in red. Ride your key light without leaving the frame.
A vectorscope with the skin-tone line and an RGB parade, reading the loupe region — always the original pixels, never the false color.
One look at the loupe tells you which — and the scopes tell you by how much.
ToneLoupe records nothing, stores nothing and sends nothing anywhere. Frames are analysed on your Mac's GPU and discarded immediately. No accounts, no analytics, no network code — just the Screen Recording permission it needs to read your screen.