Image Watermark
Apply text or logo watermarks to your images. Choose 9-point anchor positioning or a full tiled repeat, adjust opacity and rotation, and export in PNG, JPEG, or WebP.
Private by architecture:
All processing is 100% client-side memory. Your data never leaves this browser tab.
No image loaded
Watermark Settings
50%
Live Canvas Preview
Select an image or load the sample above to start watermarking.
About This Tool
The Image Watermark tool lets you brand photos, protect proofs, and mark documents with custom text or secondary logo stamps directly on your device.
Rendered entirely via the HTML5 2D Canvas API, all processing remains completely private and offline. You can position watermarks using a 9-point anchor grid or repeat them in a diagonal tile across the entire image.
Key Features
- Text and image watermarks: Stamp crisp custom text or upload transparent PNG logos and badges.
- 9-point anchor and tiled pattern: Snap to any corner, edge, or center, or tile watermarks across the full picture to deter unauthorized cropping.
- Opacity and rotation control: Fine-tune transparency from 0 to 100% and angle text from -90 to +90 degrees.
- Lossless and compressed export: Save watermarked results as PNG, JPEG, or WebP with adjustable compression quality.
Frequently Asked Questions
Are my images or logos uploaded to any server?
No. The watermarking algorithm runs entirely in browser memory on the HTML5 Canvas. No file data leaves your machine.
Can I watermark photos with transparent logos?
Yes. Upload any PNG, SVG, or WebP graphic with an alpha channel and adjust opacity to blend it seamlessly into the background photo.
How do tiled watermarks work?
Selecting Tiled Repeat calculates a repeating geometric grid across the canvas with consistent spacing and angled rotation.
Does applying a watermark lower image resolution?
No. The output canvas matches the full native resolution of your uploaded base image.
