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Watermark PDF Online

Add custom text or image watermarks to PDF documents. Protect your content with visible branding. Customize position, opacity, and size.

Watermark PDF is a free browser-based tool from SublimePDF. No registration, no file uploads, no watermarks — your files stay on your device throughout the entire process.

Drop your PDF files here

or click to browse — up to 50MB

Key Watermark PDF Features

Add text watermarks

Add image/logo watermarks

Customize position and angle

Adjust opacity and size

Apply to all or specific pages

Choose foreground or background placement

How to Watermark PDF Online

Follow these simple steps to watermark pdf your files in seconds.

Upload your PDF

Select the PDF document you want to watermark.

Create your watermark

Enter your watermark text or upload an image/logo. Customize the position, size, angle, and opacity.

Apply and download

Preview the watermark on your document, then click 'Apply' and download the watermarked PDF.

About the Watermark PDF Tool

Protect your documents and establish brand presence with SublimePDF's Watermark PDF tool. Add custom text watermarks like 'CONFIDENTIAL', 'DRAFT', or your company name, or overlay your logo across pages. Fine-tune the appearance with controls for position, rotation angle, opacity, font size, and color. Apply watermarks to all pages or select specific ones — perfect for protecting sensitive documents or branding your deliverables.

Why Use Watermark PDF Online?

Add text or image watermarks with precise control over opacity, rotation, size, and position. Apply different watermarks to different page ranges — for example, 'DRAFT' on content pages and your company logo on the cover. Watermarks are rendered at document resolution for clean printing.

Completely free — no registration, no watermarks, no hidden fees.
Private by design — files stay on your device; nothing is uploaded.
Instant results — browser-based processing means no waiting for server queues.
Works everywhere — Chrome, Firefox, Safari, and Edge on desktop, tablet, or mobile.

Privacy & Security

Your privacy matters. When you use SublimePDF's Watermark PDF tool, all processing happens directly in your web browser using WebAssembly technology. Your files are never uploaded to our servers, never stored, and never seen by anyone but you.

About the PDF Format

PDF (Portable Document Format) was developed by Adobe and standardized as ISO 32000. It preserves document formatting across all devices and platforms, making it the universal standard for sharing and archiving documents.

Watermark PDF — Frequently Asked Questions

Can I use my company logo as a watermark?

Yes! Upload any image (PNG with transparency works best) to use as a watermark. Position and size it anywhere on the page.

Can I adjust the watermark opacity?

Absolutely. Slide the opacity control from fully transparent to fully opaque to get the perfect visibility level.

Can I watermark specific pages only?

Yes. Choose to apply the watermark to all pages, specific page ranges, or only odd/even pages.

Will the watermark be removable?

Watermarks are embedded in the PDF. While they're visible, they add a layer of protection to your content. For stronger protection, consider our PDF protection tool.

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