Concretely, the mark is added as real SVG elements, so it scales with the artwork and stays crisp at any size — and, being markup, it is also trivially removable, which is worth knowing before you rely on it. You control the position, the size and the opacity, and the same settings are applied consistently across everything you upload.
Can I use my own logo, or only text?
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Either. Upload a transparent PNG logo, or type text and choose the font, colour and opacity. A tiled repeat is available when one corner mark is too easy to crop away.
Does the file format affect how the watermark comes out?
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It does. SVG is XML geometry rather than pixels, so it scales to any size without blurring but has no pixel grid to sample from. That governs how cleanly a semi-transparent mark can be blended into the underlying content.
Anything specific to SVG worth knowing?
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Yes — nothing is sampled: the file is edited as text, so the result is still infinitely scalable and still diffable in version control. It affects when in your workflow the mark should be applied.
Does a watermark actually protect my work?
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It deters casual reuse and it credits you; it is not security. A corner mark can be cropped and a faint one can be painted out. If protection matters, a large semi-transparent mark across the subject is far harder to remove than a discreet one in a corner.
Should I watermark before or after resizing?
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After. Watermark the final deliverable at its final size, so the mark stays legible and proportionate. Watermarking a master you will process again means the mark gets resampled and compressed along with everything else.
