Watermark Images in Bulk — Free & Private

Protecting a batch of photos or branding a product gallery? Add a watermark to all of them in one pass. Type a line of text or drop in your logo, set where it sits and how strong it looks, and stamp the whole set. Everything runs in your browser, so your images are never uploaded and there is no limit.

Drag & Drop Images

Add a text or logo watermark · in your browser

100% Browser-Local — images never leave your device

The watermark is drawn onto each image with the Canvas API right on your device. Tune the position, size and opacity once and it applies to every photo, so a hundred images take about as long as one. Then download them together as a single ZIP.

Two ways to watermark

Text watermark

Add your name, website or a copyright line. Quick, sharp at any size, and easy to read across the corner or centre.

Logo watermark

Drop in a transparent PNG logo for a branded look. Set the opacity low for a subtle mark or high to deter reuse.

Tips for a clean watermark

Keep it readable but not distracting — a lower opacity in a corner usually beats a heavy stamp across the middle. Resize the batch first with the Bulk Image Resizer so the watermark looks consistent, and shrink the finished files with the Bulk Image Compressor before sharing.

Frequently asked questions

Is the watermark tool free?

Yes — free, with no sign-up and no watermark from us, and no limit on how many images you stamp.

Can I use my own logo?

Yes. Upload a PNG logo (transparency is kept) and place it on every image, or use a line of text instead.

Are my images uploaded?

No. Watermarking happens in your browser with the Canvas API, so your photos stay on your device.

Will a watermark stop people stealing my photos?

It makes casual reuse much harder and marks the source, but no visible watermark is completely tamper-proof. Keep an unmarked original safe.