Bulk Image Watermarker — Add Logo Watermark to Multiple Images Free
Upload multiple images and a custom PNG watermark, position it anywhere, adjust size and opacity — all processing happens in your browser. Download the entire batch as a ZIP archive.
Frequently Asked Questions
How does the bulk watermarker work?
Upload your base images (JPEG, PNG, WebP) and a PNG watermark file. Set the position, size percentage, and opacity, then click "Apply Watermark". Each image is processed on an HTML5 Canvas in your browser — nothing is uploaded to any server. Download all results as a ZIP archive or save individual files.
What image formats are supported?
Base images can be JPEG, PNG, or WebP. The watermark must be a PNG file to support transparency. Output images are exported as high-quality PNGs to preserve the watermark alpha channel.
Can I control the watermark opacity?
Yes. The opacity slider ranges from 5% (nearly invisible — ideal for subtle branding) to 100% (fully opaque). Combined with the size slider (5–80% of image width) and a position selector, you have full control over how prominent the watermark appears.
Is there a limit on how many images I can watermark at once?
You can drop up to 20 images per session. Each image is processed independently using HTML5 Canvas. The daily operation counter logs each full batch as one operation.