Add a watermark to images
Mark photos with a name, a copyright line or a logo before posting or sending them, on one picture or a whole batch.
Text, logo and tiling
Enter a line of text, such as a name, a handle or a copyright notice, and choose the font, weight and colour, or choose a logo picture; a PNG with a transparent background blends in best. A single mark can be placed in any of nine positions or dragged to the required spot on the preview, or the mark can be tiled diagonally across the whole picture so that it cannot simply be cropped away.
Consistent placement
Size and position are kept as a share of each picture, so a mark in the bottom-right corner sits in the bottom-right corner of a tall phone photo and of a wide banner alike. Opacity and rotation apply to all of them, and every image is exported at its full original resolution.
Download options
Each file can keep its own format, or the batch can be converted to PNG, JPEG or WebP. Images can be downloaded one by one or all together as a ZIP; file names end in “-watermarked” so that the originals are easy to tell apart.
Key features
Never uploaded
The watermark is drawn inside the browser; photos and logo stay on the device.
Free, no account
No sign-in, no credits and no Arumi watermark, only the one that is chosen.
Batch processing
Up to 20 images receive the same mark in the same place, whatever their size.
How to add a watermark
Step 1
Add up to 20 images (PNG, JPEG, WebP, AVIF, GIF or BMP, 40 MB each).
Step 2
Write your text or choose a logo, then set position, size, opacity and rotation.
Step 3
Add the watermark and download the images or a ZIP.
Frequently asked questions
Need more information? Email us at support@arumi.ai.
Are my photos uploaded anywhere?
No. Everything happens in this browser tab; nothing is sent to a server, and closing the tab discards the images.
Will the watermark be the same size on large and small photos?
Yes, relative to each photo. The size is a share of the picture's width, so it looks the same on every image in the batch.
Can a tiled watermark be removed by cropping?
A tiled mark covers the whole picture, so cropping cannot take it out the way it can with a single corner mark.
Get started
Open a file at the top of this page. The file stays on the device.