Can I watermark my main listing image?

You should not. Amazon's rules for the main image ask for no text, logos or watermarks on it, and Flipkart's guidance is similar. Stamp the photos you send to resellers and the secondary images where it is permitted, and check the current rules in your seller panel before you stamp anything you are about to list.

I chose tiled with a logo and got one logo in the middle.

That is a limitation rather than a mistake on your part. The tiled pattern is built for text only; with a logo loaded, the tiled setting falls back to a single stamp in the centre of the picture. Use text if you want the repeating pattern, or a corner placement for the logo.

Can I see the watermark before I download?

Not on the page - the grid shows your original photos and the stamp is applied during the export. Run one image through first, look at the result, adjust the size or the opacity, then do the folder. A single image comes back as a file rather than a ZIP, so that check takes seconds.

Will a watermark stop someone stealing my photos?

No. Anyone determined can crop off a corner stamp or paint it out. What it does is make casual copying visible and give you evidence when you report a listing. A tiled stamp across the middle is much harder to remove and much uglier to look at, which is the trade you are making.

What colour should the text be?

White at the default 35 per cent works on most product photos, and the shadow behind it keeps it legible even over a white background. Against a pale product or a white sweep, a dark grey at the same opacity reads more clearly than white does.

Watermark a folder of product photos

Catalogue photos travel. You send a set to a reseller on WhatsApp, and a fortnight later the same photo is on somebody else's listing, with your lighting and your props in it. A watermark does not make that impossible, but it makes it obvious, and it gives you something concrete to point at when you report the listing.

Type your shop name or load your logo, choose where it sits and how strongly it shows, and the whole folder comes back stamped. The logo file is read by the same browser tab as the photos and goes no further than your own machine.

Watermark photos Needs an account. The trial is free and takes a WhatsApp code.

How it works

Add the photos. The catalogue set you share with resellers is the usual batch for this. Listing images have their own rules, which the questions below go into.
Type the text, or choose a logo. Up to sixty characters of text, or a logo image from your computer. A PNG with a transparent background works best. A logo replaces the text rather than sitting alongside it.
Place it. Any of the four corners, the centre, or tiled at an angle across the whole image. Bottom right is the default and the least intrusive.
Set the opacity and the size. 20, 35, 55 or 80 per cent. 35 is the default: readable without shouting. Text size is measured against the shorter side of each image and a logo against the width, so a mixed batch gets a proportionally equal stamp.
Export. The batch comes back as a ZIP called watermarked-images. Your originals, unstamped, are still on your disk.

What it handles

Text up to sixty characters, or a logo image loaded from your own computer
Six placements: the four corners, the centre, or tiled at an angle across the picture
Opacity at 20, 35, 55 or 80 per cent
A soft shadow behind the text, so a pale stamp still reads against a pale photo
A colour picker for the text, starting at white
Sizes measured as a fraction of the image rather than in pixels, so every photo in a mixed batch is stamped proportionally
The logo is read in the tab exactly like the photos - it is not uploaded and not stored

Your files stay on your computer

This runs inside your browser tab. The file is read and written on your own device and is never uploaded — not the order PDF, not the customer names and addresses printed on it. There is no upload endpoint to send it to.

Questions

Can I watermark my main listing image?: You should not. Amazon's rules for the main image ask for no text, logos or watermarks on it, and Flipkart's guidance is similar. Stamp the photos you send to resellers and the secondary images where it is permitted, and check the current rules in your seller panel before you stamp anything you are about to list.
I chose tiled with a logo and got one logo in the middle.: That is a limitation rather than a mistake on your part. The tiled pattern is built for text only; with a logo loaded, the tiled setting falls back to a single stamp in the centre of the picture. Use text if you want the repeating pattern, or a corner placement for the logo.
Can I see the watermark before I download?: Not on the page - the grid shows your original photos and the stamp is applied during the export. Run one image through first, look at the result, adjust the size or the opacity, then do the folder. A single image comes back as a file rather than a ZIP, so that check takes seconds.
Will a watermark stop someone stealing my photos?: No. Anyone determined can crop off a corner stamp or paint it out. What it does is make casual copying visible and give you evidence when you report a listing. A tiled stamp across the middle is much harder to remove and much uglier to look at, which is the trade you are making.
What colour should the text be?: White at the default 35 per cent works on most product photos, and the shadow behind it keeps it legible even over a white background. Against a pale product or a white sweep, a dark grey at the same opacity reads more clearly than white does.

Related tools

Watermark photos