HeroTools / Image
Local · Private · Free

Bulk Watermark

Stamp a text or logo watermark across a whole batch of images at once. Everything runs on your machine — nothing is uploaded.

⬆
Drop images here
or click to browse — JPG, PNG, WebP, GIF
🔒 Files never leave your browser
Preview updates live · drag the position grid
Drop or click to add a logo
PNG with transparency works best
Distance from the edges (ignored when tiling).
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Watermark a whole folder, privately

Most batch watermark sites upload every photo to a server first. HeroTools draws the watermark with your device's own Canvas — instant, completely private, works offline. Text & logo watermarking, per-image download, and one-click ZIP export of the entire batch are all completely free.

About Bulk Watermark

Bulk Watermark is a free, private image tool that runs entirely in your web browser. Stamp text or a logo across many images at once. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for watermark, protect, logo, batch. Like every HeroTool by Digital Heroes, Bulk Watermark is 100% free with no limits.

How to use Bulk Watermark

  1. Open Bulk Watermark — it runs entirely in your browser, with no signup.
  2. Drag and drop your file (or click to browse) — it never leaves your device.
  3. Adjust the options to match exactly what you need.
  4. Copy or download your result — it is free, and your data stays on your device.

Frequently asked questions

Is Bulk Watermark free?

Yes — Bulk Watermark is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. Bulk Watermark runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. HeroTools is a Progressive Web App — once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does Bulk Watermark do?

Stamp text or a logo across many images at once.

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