העיקר בקצרה (BLUF): The tool places a virtual light source right on your photo: drag it across the frame with the mouse and the picture is relit — with shadows, a specular highlight and crease shading. Depth is estimated in your browser, so the photo is never uploaded, no sign-up is needed and no tokens are charged.
First a depth model estimates what is closer and what is farther in the shot. That depth map is turned into an approximate normal map — the surface tilt at every point. A shader then computes light from a point source: the closer a surface is to the lamp and the more it faces it, the brighter it becomes, while distant areas fall off.
You can drag the light across the photo with a mouse or a finger. The light height sets how high the lamp hangs above the scene: a low light gives long shadows and strong relief, a high one gives soft even lighting. Intensity, specular highlight and ambient light are tuned separately, and the light colour is set by temperature — from warm tungsten to cold daylight.
Shading is computed from the depth map: the tool traces a ray from each point towards the light and checks whether a closer surface blocks the way. That is how shadows from a chin, clothing folds and objects appear. Crease shading emphasises small dips, and the relief slider strengthens or softens the volume.
The limitation is worth knowing: this is depth-based relighting, not generative relighting. There is no real three-dimensional scene behind the frame, so old complex shadows and reflections are not fully removed — the tool relights the photograph for a new light position.
All processing happens on your device: both the depth estimation and the relighting itself. The file is never sent to a server, no account is required and no tokens are charged. The result downloads as a separate PNG at the full resolution of your photo, and the original stays untouched.
If your browser cannot open a format locally, the tool says so honestly and suggests saving the photo as JPG or PNG instead of sending the file to a server.
Yes. It runs entirely in your browser, needs no login and spends no tokens.
No. Both the depth map and the relighting are computed on your device and the file is never transmitted.
A filter brightens the whole frame evenly, while here the light comes from a specific point: nearer surfaces and surfaces facing the source get brighter, and blocking geometry produces shadows.
JPG, PNG, WebP, GIF, BMP and AVIF — whatever the browser can open itself. The result downloads as PNG at the original resolution.
Yes. The light point can be dragged with a finger and all sliders work on mobile. The first run downloads the depth model; after that it comes from the browser cache.