Add Watermarks to PDF Without Uploading
Stamp your PDF pages with text or image watermarks — entirely in your browser. No uploads, no servers, no third parties. Your documents stay on your device from start to finish.
Private by default: files are processed locally and never uploaded.
We're building the watermark PDF tool right now. In the meantime, check out our fully working Image to PDF Converter — same privacy-first approach, ready to use today.
Why Watermark PDFs Without Uploading?
Watermarking is essential for protecting sensitive documents — marking proposals as "DRAFT," stamping contracts as "CONFIDENTIAL," or branding reports with your company logo. But most online watermark tools require you to upload your files to a remote server. That means confidential business documents, legal contracts, and intellectual property all pass through infrastructure you don't control.
PDFMold eliminates that risk entirely. The watermarking happens in your browser using JavaScript, so your documents never leave your device. Whether you're stamping a single-page NDA or branding a 100-page proposal with your logo, everything stays local. Open your browser's Network tab to verify — you won't see a single outgoing file request.
How to Watermark a PDF in Your Browser
- Open the PDFMold Watermark PDF tool in your browser — no installation or account required.
- Drag and drop your PDF file onto the page, or click to browse your files. Your file stays on your device.
- Choose a text watermark (e.g. "DRAFT" or "CONFIDENTIAL") or upload an image such as a company logo.
- Adjust the watermark position and opacity to keep the underlying content readable.
- Click "Apply Watermark" to stamp your PDF and download the result instantly — nothing is uploaded.
Frequently Asked Questions
Are my files uploaded to a server when adding a watermark?
No. PDFMold adds watermarks entirely in your browser using JavaScript. Your documents are never sent to any server. You can verify this by opening your browser's Network tab — you'll see zero outgoing file requests.
Can I add image watermarks to my PDF?
Yes. You can add both text watermarks (such as "DRAFT," "CONFIDENTIAL," or any custom text) and image watermarks (such as a company logo or signature). Both types are applied locally in your browser.
Can I control the watermark position and opacity?
Yes. You can position the watermark anywhere on the page — center, corners, or custom coordinates — and adjust the opacity so the watermark is visible without obscuring the underlying content.