100% Client-Side Privacy

Add Watermark to Images Online

Protect your photos with professional text or logo watermarks. Add custom branding, copyright notices, signatures, or logos to one or multiple images instantly inside your browser.

Drag & Drop Photos to Watermark

Support single files or entire batches. Paste from clipboard (Ctrl+V) or click below.

JPG PNG WEBP GIF BMP TIFF HEIC AVIF SVG

Why Watermark Your Images?

Protecting your intellectual property is essential in todayโ€™s visual digital economy.

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Copyright Protection

Deter content theft and unauthorized scraping by permanently embedding your ownership notices and copyright details onto visual media.

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Brand Recognition

Turn every shared photo, social post, or store product image into an active marketing channel with your official company logo or handle.

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100% Client-Side Security

Your photos stay on your device. All watermarking canvas math occurs locally inside your web browser memory with total privacy.

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Batch Efficiency

Watermark hundreds of catalog photos, client proofs, or portfolio images simultaneously without tedious manual repetitive editing.

How It Works in 3 Easy Steps

1

Upload Photos

Drag and drop one photo or a whole folder of images into the secure browser workspace.

2

Customize Design

Type custom text, upload your logo, draw a signature, or choose stamp presets with live canvas feedback.

3

Export & Save

Download single watermarked images or bulk export your entire batch directly as a compressed ZIP file.

Related Free Image Tools

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Frequently Asked Questions

What is an image watermark?
An image watermark is a semi-transparent text, logo, signature, or stamp superimposed onto a photo to establish ownership, prevent unauthorized stealing or hotlinking, and market your brand identity across digital channels.
Can I add my logo as a watermark?
Yes! You can upload PNG, SVG, WEBP, or JPG logo graphics, adjust their size, opacity, rotation, brightness, and contrast, and drag them into position on your photographs.
Can I watermark multiple images at once?
Yes. ReducerImage supports high-speed batch processing. You can drop an entire folder of photos into the workspace, configure your layout once, and download a ZIP file containing all watermarked photos.
Will my images be uploaded to a server?
No. All rendering and export operations take place 100% inside your web browser using modern HTML5 Canvas APIs. Your original high-resolution photos never leave your device.
Can I control watermark opacity and position?
Yes, you have full control over opacity, 9-point grid alignment presets, precise margin offsets, rotation angles, tile patterns, and interactive drag-and-drop placement on the canvas.
Which image formats are supported?
We support JPG, JPEG, PNG, WEBP, GIF, BMP, TIFF, HEIC, AVIF, and SVG images.