How to use
- Drop an image in, or click to choose one.
- Drag a rectangle over the watermark you want gone.
- Pick a quality level and hit Remove.
- Hold Hold to compare to check it against the original, then Download.
To clear several watermarks, repeat steps 2–3 — each pass works on the result of the last.
How the fill works
This uses PatchMatch content-aware fill (Barnes et al., SIGGRAPH 2009) — the algorithm Photoshop’s Content-Aware Fill is built on.
For every pixel in the hole, it searches the rest of the image for the small patch whose surroundings look most like this pixel’s surroundings, then copies that patch’s centre colour across. Each pixel picks its own source independently, so gradients, sky-to-ground transitions and regular textures follow the surrounding image naturally instead of averaging into a blur.
Each iteration does three things:
- Propagate — try the offset that worked for the neighbour. Adjacent pixels usually have adjacent best sources, so good matches spread outward.
- Random search — try progressively finer random offsets to escape local minima.
- Vote — rewrite the hole from the best sources found so far.
After a few rounds it converges. Only the perimeter ring gets a light blur at the end, to hide any residual colour step at the seam; the interior stays sharp.
What it cannot do
The algorithm does not imagine content. It relocates it.
What it can do is continue texture that already exists nearby into the covered area. Flat backgrounds, sky, grass, wood, walls, smooth gradients — these usually come out clean enough that the repair is invisible.
What it cannot do is produce something that was never in the picture. A watermark across a face will not become that half of the face. One sitting in a line of text will not become those letters. Over a building’s distinctive structure, it will fetch some plausible-looking texture from elsewhere, and it will not survive close inspection.
When that happens, a smaller selection — or several passes over different parts — often beats one big box.
About image size
Images longer than 2048px on their longest edge are scaled down before processing.
Cost scales with area: on a 4000×3000 phone photo, a watermark box that looks small can be hundreds of thousands of pixels and take tens of seconds. At 2048 the watermark is still perfectly legible and the work drops by an order of magnitude.
The download is at the processed size. If you need the original resolution preserved, this is not the right tool — it is built for a quick fix, not for retouching work.