Watermark Adder — Free Online Tool

The Watermark Adder overlays text or a logo onto an image, with control over position, size, and opacity.

A watermark is a deterrent and an attribution mark rather than real protection, and it is worth being clear-eyed about that. Anyone determined can crop it out or remove it, and the tools for doing so have got considerably better. What a watermark actually does well is discourage casual reuse and, more usefully, travel with the image when it gets shared — so the person who finds your photo three reposts later can still see who made it.

That reframes the design decision. A watermark placed discreetly in a corner is trivially cropped; one placed across the middle survives cropping but ruins the image. The usual compromise is a low-opacity mark positioned over part of the subject rather than in dead space, large enough to be readable but transparent enough not to dominate. Somewhere around 30 to 50 percent opacity is where most people land.

Which approach to take depends on what the image is for. Portfolio pieces and client proofs benefit from a visible mark; images shared for reach — social content, blog images you want circulated — are usually better with something subtle, since an intrusive watermark measurably reduces sharing.

The overlay is composited in your browser and the image is never uploaded, which matters for unreleased client work.

Our Watermark Adder is completely free to use with no signup required. For this tool, processing runs in your browser — your files and data stay on your device and are not uploaded to our servers.

Whether you are a developer, designer, student, or business owner, this tool is designed to save you time and make your workflow more efficient. Bookmark this page to access it whenever you need it — it will always be free.