Watermark image
Stamp a name, copyright line or logo over your photos. Set size, transparency, angle and position, or tile it across the whole image. Nothing is uploaded.
First run downloads the conversion engine (about 4 MB) once, then it is cached.
Advanced options
Text or logo watermarks
Type a name, a copyright line or a URL and place it in any corner, the centre, or tiled diagonally across the whole image. Or upload a logo, ideally a transparent PNG, and set its width as a percentage of each photo. Opacity, size and rotation apply to every file in the batch, so a hundred product photos take one click.
Nothing is uploaded
The engine is Rust compiled to WebAssembly and runs inside this browser tab. Files never leave your device, which makes the tools fast and safe for private photos and documents.
Frequently asked questions
Can I use my own logo?
Yes. Switch to Logo / image and choose a PNG, ideally with a transparent background. Its width is set as a percentage of each photo so it scales with the image.
Can I watermark many photos at once?
Yes. The same text or logo, size, opacity and position is applied to every file in the batch.
Are my images uploaded?
No. The tool runs inside your browser with WebAssembly. Photos never leave your device, so it is safe for IDs, documents and private pictures.