Watermark & Protect PNG Images — Free Online
Protecting your PNG images with a watermark prevents unauthorized use and ensures proper attribution. Lossless image format that supports full alpha transparency. Best for logos, graphics, and images requiring sharp edges. Add your name, handle or © line in any corner, or repeat it across the whole image, and see the result as you type. All processing happens in your browser — your PNG files are never uploaded.
Corner placement
Place watermarks in a corner — visible but not intrusive
Semi-transparent
Use 50–70% opacity for a professional, non-distracting look
Hard to crop out
Turn on Repeat to cover the whole image — a corner mark can simply be cropped off
Brand identity
Include your brand name, website URL, or copyright notice
Compress your PNG too
Reduce file size before sharing — instant, browser-based, free.