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Watermark Image

Brand images with Text or a Logo

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How to Watermark Image

1 Upload the images you want to mark, already at their final size — watermarking comes after resizing, not before it.
2 Upload a transparent PNG logo or type your text, then choose the font, the colour and the opacity.
3 Set the position, or switch to a tiled repeat when a single corner mark would be too easy to crop away.
4 Download the watermarked Image file; nothing else is added to it.

Watermark Image FAQ

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.
Concretely, the mark is composited per file with position, scale and opacity applied consistently, which is how you brand a whole set of images identically in one pass. You control the position, the size and the opacity, and the same settings are applied consistently across everything you upload.
Yes — the pipeline reads the real format from the file header rather than the extension, so a mislabelled upload still works. It affects when in your workflow the mark should be applied.
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.
All of the common ones — JPG, JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, PSD, JFIF and HEIC. You can mix formats freely in one batch; each file is identified from its header and routed to the right decoder.
Yes: free accounts process images up to 25 MB each regardless of which image format you brought; ImageMagick, libjpeg-turbo, libpng and libwebp do the actual work. The cap is per file, so a batch of twenty 5 MB photos is fine even though the total is well over the limit.
That depends on what you brought. A lossless source (PNG, BMP, TIFF) round-trips exactly; a lossy one (JPG, WebP, GIF) is already the product of one quantisation pass and only re-encodes if the operation genuinely requires it.
Yes, and mixing formats in the batch is fine — settings are applied per file with the right decoder for each. Free accounts run one file at a time; a pass removes that.
EPUB.to is built around the open eBook format — XHTML in a zip, reflowable by design, and readable on hardware nobody has thought about the layout for. A book is a zip full of markup, images and fonts, so almost every job people bring to an eBook site is really a job on one of those things. Watermark Image runs on the same upload and the same account as the conversions because that is where it is needed.
The converter on this site moves books between EPUB, MOBI, AZW3, PDF and DOCX, so a title ends up on whatever hardware is actually going to read it. Doing that after Watermark Image means the conversion is made from the version you settled on, not from the one you were still fixing.
The engines are shared — the same toolchain, the same workers, the same limits. What a EPUB site adds is a view on reflow: which of these operations a reflowable book genuinely supports, and which ones only make sense on the fixed-layout media inside it. It also starts from one fact about the format this site is named after: the book is a zip of XHTML with a manifest, so the text costs almost nothing and every decision that matters is about the embedded images and font subsets.
No account, and nothing is kept: uploads are deleted from the workers shortly after the job finishes, nothing is read and nothing is indexed. Free accounts exist for history and batch size, not for access.

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