Why this tool is useful
Apply a logo, ownership mark or campaign badge to an image while retaining control over both original files and the exact visual placement.
Local File Tools · runs locally
Private Image Watermark Maker
Overlay a second local image as a scaled, positioned watermark and export a clean PNG without uploading either source file.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy.
How it works
The first selected image becomes the base and the second becomes the watermark. The browser decodes both into bounded canvases, composites the chosen opacity and exports PNG.
Practical example
Select a photo first and a transparent PNG logo second, choose 20% width and a corner, preview the result, then download the locally generated PNG.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.