Add Watermark to Image
Stamp custom text watermarks or transparent PNG logos with custom opacity, rotation, and positioning privately, right in your browser.
Drop photo here to watermark
or click to browse from your computer
Supports JPG, JPEG, PNG, WEBP, and BMP up to 50MB per file.
How to Watermark Photos Online
Upload Base Photo
Select or drag and drop any JPG, PNG, or WebP photo into the workspace.
Add Text or Logo
Type custom copyright text or upload a transparent PNG logo. Customize opacity and alignment.
Download Image
Click "Download Watermarked Image" to save your protected photo instantly.
Why Add Watermarks to Your Images?
Protect Copyright
Prevent unauthorized content scraping and re-use of your original photography on social media.
Increase Brand Awareness
Stamp company logos or website URLs so viewers always know the original source of your work.
100% Local Browser Privacy
No server uploads means complete security for private client drafts, property photos, and artwork.
Technical Specifications
| Feature | Specification |
|---|---|
| Supported Base Formats | JPG, JPEG, PNG, WEBP, BMP |
| Watermark Modes | Custom Text (Fonts, Colors) & Logo Overlay (PNG, SVG) |
| Position & Pattern Modes | 9-Point Grid Alignment & Full-Surface Tile Pattern Grid |
| Export Formats | PNG, JPG, WebP |
| Max File Size Safety Limit | 50 MB per file |
Frequently Asked Questions
Is my original photo quality preserved?
Yes. ConverterMaster renders watermarks directly onto your high-resolution image using HTML5 Canvas without forced downscaling.
Can I use a transparent PNG logo as a watermark?
Yes. Transparent PNG and SVG logos are fully supported with opacity slider controls.
Are my images uploaded to any server?
No. All image compositing happens 100% inside your local web browser. Your photos are never uploaded.
Related Image Utilities
Making a Watermark That Works
A watermark has to be visible enough to discourage reuse without ruining the picture. The controls on this page give you room to find that balance.
Text or logo?
Text is fastest for a name or website address. A logo looks more polished and is better when the same mark appears across many images. Use a PNG or SVG with a transparent background, so the logo does not carry a white box around it.
Placement, opacity and size
- Corner placement (the BR or BL cells of the alignment grid) is unobtrusive but easy to crop out. It suits portfolio shots where appearance matters most.
- Center or tiled placement is much harder to remove, but it covers the subject. Pair it with a lower opacity and a rotation angle of around 30 degrees so the image remains easy to view.
- An opacity near the 70% default is clear on most photos. Lower it for busy images only if the mark stays readable on both light and dark areas.
Readability on mixed backgrounds
A white mark disappears on snow or sky, and a dark one vanishes in shadows. Pick a color that contrasts with the area where the mark will sit, or choose a mid-tone and rely on opacity. A bolder font such as Impact holds up better when the watermark is small.
Export settings
Use PNG if you want no extra compression, though the file will be large. JPG is the pre-selected format and is a good choice for sharing photos. Keep a clean copy of every original, because a watermark cannot be reliably removed later. If the final file is too heavy for uploading, pass it through the image compressor.