Watermark Image
Add a text or logo watermark to a photo, with control over size, angle, opacity and tiling.
Redaction & masking Client-side Canvas compositing (text + image)
Tool preview
How to use it
- 01
Drop an image.
- 02
Choose a text watermark or drop a logo image.
- 03
Tune size, opacity and angle, then download.
Limitations
- ! The watermark is burned into the pixels and cannot be removed later.
- ! Dense repeating watermarks can make the underlying image hard to read.
- ! Logo transparency is respected; a JPEG logo will bring its own background.
FAQ
Can I use an image as a watermark?
Yes — switch to the logo tab, drop a PNG (transparency supported) and pick its size, opacity and rotation.
Does it reduce image quality?
The output is re-encoded as PNG, so there is no visible loss.
Can I watermark many files at once?
Yes, use the batch watermark tool — it applies one text watermark to a whole set.
Files never leave your device
Processing happens in your browser using the File API, WebAssembly and Web Workers. There is no upload endpoint.
Technical details
- Processing
- Client-side
- Implementation
- Canvas compositing (text + image)
- Category
- Redaction & masking
- Network requests
- None while processing