tooloora

Add Watermark to Image — text or logo, batch included

Place text or a logo on your photos: nine grid points or free positioning, size, opacity, rotation, optional tiling — locally in your browser, no upload.

Runs locally — nothing is uploaded

Drop images here or click

JPG, PNG or WebP · multiple files supported · stays local

Runs locally in your browser – no upload.

Pick an image and the preview appears here.

Add a watermark to an image — text or logo, in seconds

Drop in one or many images, choose text or a logo, put the watermark on one of the nine grid points or anywhere you like, set size, opacity and rotation, and download the result — as a ZIP for several files. Everything happens locally in your browser: your photos are never uploaded, which is what matters for unpublished shots.

Why is the size a percentage and not a pixel value?

Because a watermark measured in pixels looks different on every image. Type at 40 pixels is a postage stamp on a 4000-pixel photo and covers half the subject on a 400-pixel thumbnail. This tool therefore measures as a share of the image width: 25 percent stays 25 percent, no matter how many pixels the file has. The payoff shows up in batches — ten photos in five different resolutions all end up with a watermark of the same visual weight.

The margin follows the same idea, but measures against the shorter side, so the spacing on a panorama does not suddenly eat half the image height. And if your chosen size no longer fits after rotating, it is scaled down just enough that nothing runs past the edge — and the tool tells you it did.

Corner or tiled?

  • A single mark in a corner is the everyday case: bottom right, 20 to 30 percent width, opacity around 35 percent. It barely disturbs the subject and stays readable.
  • Tiled across the whole surface is for previews, proofs and quotes: hard to crop away because the pattern is everywhere, at the price of sitting visibly on top of the picture. The grid deliberately extends past all four edges, otherwise an unmarked strip would remain around the border.
  • Free positioning helps when the picture offers a calm area: sky, a wall, a tabletop.

Does a watermark actually protect the picture?

It marks, it does not protect. Anyone determined can crop the corner off or retouch the mark away. Something else is reliable: under Article 15 of the Berne Convention, which more than 180 states have joined, the person named on a work in the usual manner is presumed to be its author unless the contrary is proved. A visible name travels with the picture — unlike EXIF or IPTC fields, which many platforms strip on upload.

If metadata is your actual concern, the EXIF tool in the image section is the better place: it shows what your photos carry and removes it losslessly.

Honest limits

The watermark is baked into the pixels — it cannot be switched off later. Work on copies and keep your originals. Saving re-encodes the file, which drops EXIF metadata including the GPS position, and JPG as well as WebP compress again (you set the quality yourself; PNG stays lossless, with only semi-transparent pixels picking up minimal rounding from the canvas alpha math). Very large images beyond roughly 16.7 megapixels are scaled down to the safe canvas limit of the browser before processing, and the tool says so.

Frequently asked questions

Are my photos uploaded to add a watermark?

No. The watermark is drawn in your browser and the file is re-encoded there as well. Your images never leave your device, which matters most for the unpublished shots you are marking in the first place.

Does a watermark protect my image from being stolen?

No, and no tool that claims otherwise is being honest: a visible watermark marks an image, it does not lock it. It can be cropped off or retouched away. What it does reliably is travel with the picture: under Article 15 of the Berne Convention, which more than 180 states have joined, the person named on a work is presumed to be its author unless proven otherwise — and unlike EXIF metadata, a visible name survives the re-encoding that most platforms apply on upload.

How big should the watermark be, and where?

This tool sizes the watermark as a percentage of the image width, not in fixed pixels — so the same setting looks identical on a 400-pixel thumbnail and on a 4000-pixel photo, and a whole batch stays consistent. A corner at 20 to 30 percent width is the usual compromise; tiling across the whole surface is harder to crop away but sits on top of the subject.

Can I watermark several images at once?

Yes. Add as many files as you like, set the watermark once and download the result as a ZIP file. Every image is measured on its own, so each one gets the same relative size and position. Files that would end up with the same name inside the ZIP are numbered instead of silently overwriting each other.

Which formats are supported and what happens to quality?

JPG, PNG and WebP go in and out; by default the output keeps the input format, and you can set the JPEG or WebP quality yourself. PNG stays lossless (only semi-transparent pixels may pick up minimal rounding from the alpha math). One honest side effect: re-encoding drops EXIF metadata, including the GPS position — usually a privacy win, but keep the original if you need those fields.