WaterClean is the watermark-removal tab inside Download SIU — it removes logos, channel bugs and watermarks from your videos with four different engines — from instant one-click filters to a local AI that rebuilds what was behind the mark. Draw over it, or let the app find and follow it for you. Everything is processed locally on your own PC — one install, no separate app.
A see-through logo, a solid channel bug, a watermark that bounces around the screen: each one has a best tool. WaterClean gives you all four and lets you compare the result before you commit.
Built-in reconstruction, blur, pixelate or crop, applied instantly. Runs in seconds and is light on the CPU. The cleanest choice for a static watermark sitting over a flat, uniform background.
Rectangles, circles, ellipses, polygons or freehand. A pixel mask is built from what you draw and used to erase the marked area. Add as many areas as you need — they all process in a single pass.
A translucent watermark doesn't erase what's under it — it blends with it, and a blend can be reversed. Exact Mode measures how transparent the mark is and recovers the real pixels instead of guessing. Arithmetic, not a neural net: minutes, not hours.
A local AI engine reconstructs the texture and lines behind the watermark — the only mode that truly recreates instead of smearing. Downloaded once, on demand, and runs entirely on your PC — nothing is ever uploaded. Optional: if the engine isn't installed yet, this tab falls back to Precise Mode automatically and tells you so. Never an error.
Want it faster or higher quality? You can optionally connect your own account with a cloud AI provider instead — same idea as Subtitle + AI: your key is encrypted and stays only on your PC, we never see it, and it's entirely optional.
Switch modes with a click — the queue, your marks and your output settings stay exactly where you left them.
Instant one-click filters. The go-to for a static watermark over a flat background.
The content of a video changes constantly; the watermark doesn't. WaterClean samples 40 frames across the whole file, measures how still each pixel is, and combines that with edge strength — a logo keeps its sharp outline after averaging, a flat sky turns to mush. You get candidates with a confidence score; the best one applies itself, the rest are one click away.
For watermarks that move or bounce around the frame, common on short-form vertical video. Mark it once, press Track motion, and the app follows it frame by frame with zero-mean normalized cross-correlation — so it holds up even as the background brightness changes. The path becomes a set of time-boxed removal segments applied only during the seconds each position is on screen.
Everything you need while marking a watermark, without leaving the keyboard.
Once the old watermark is gone, drop in your own text or logo — pick a font, colour, opacity, rotation, outline, shadow and one of nine anchor positions, or draw it exactly where you want. Apply it to one video or the whole batch, and choose the exact seconds it stays on screen.
Dial in the mode, method, intensity and output format that works for a given source — optionally with the marked zones — and save it as a named recipe. Next time, apply it to a new video or the whole batch instantly instead of setting everything up again.
Export to MP4, MKV, MOV or AVI at the quality you choose, with hardware acceleration (NVENC / QSV / AMF) detected automatically. Subtitles, chapters, fonts and metadata are carried over when the container allows it — and the app tells you when it can't.
WaterClean isn't a separate app or a separate purchase — it's a tab inside Download SIU, unlocked by the same license as everything else. New here? Start the 5-day trial right inside the app, or pick a plan.
Windows 10 & 11 · processes everything locally · your files never leave your PC
