About WatermarkOn

WatermarkOn is a free web tool that adds text and logo watermarks to images and PDF files. We built it because most online watermark services make you upload your photos and documents to their servers, add their own branding, or lock basic features behind a paywall.

How it works

When you use WatermarkOn, the watermark is applied by your own browser. Your files are read locally, the watermark is drawn on them on your device, and the result is offered to you as a download. Nothing is uploaded and nothing is stored — which makes the tool fast, private and free to run. How we handle your files.

What you can do

• Watermark photos with text or a logo
• Add watermarks to PDF files, on all or selected pages
• Add your logo to images and to PDFs
• Add text to images and create a watermark PNG
• Batch-watermark hundreds of files at once

We also publish step-by-step guides for adding watermarks in popular software like Photoshop, Word or PowerPoint.