Add Watermark to PDF — Free & Private

Add custom text or image watermarks to your PDF for branding or protection. Everything runs locally in your browser.

How it works

Watermark any PDF in a few clicks—private, fast, and pixel-perfect.

  1. Select your PDF

    Click “Select PDF”. Processing is 100% local on your device.

  2. Choose watermark type

    Pick Text (e.g., CONFIDENTIAL) or Image (PNG/JPG logo).

  3. Customize style

    Adjust opacity, rotation, color/size (text) or scale (image).

  4. Placement & pages

    Center, corners, or tiled. Apply to all or selected pages.

  5. Create & download

    Generate your watermarked PDF and download or preview instantly.

🔒 Privacy-first: Your PDFs never leave your browser.

Features that make watermarking effortless

Brand or protect documents with precision—no software installs, no uploads.

Text watermarks

Add labels like CONFIDENTIAL/DRAFT with font, size, color, rotation & opacity.

Image watermarks

Use a PNG/JPG logo. Control scale, rotation, and transparency precisely.

Flexible placement

Center or any corner—or use Tiled to repeat diagonally across the page.

Per-page control

Apply to all pages or select specific pages via the live thumbnail grid.

Real-time feedback

Thumbnail hints & a progress bar while pages are processed.

Private by design

Everything is browser-based. No uploads, no servers, no tracking.

Clean output

Standards-compliant PDFs that render crisply in viewers and print.

Fast & lightweight

Optimized client-side processing for multi-page PDFs.

Private & local processing

Add professional watermarks—clean, consistent, print-ready

Choose text or logo, set opacity and rotation, and place it exactly where you want—center, corners, or tiled.

What this tool does

Add text or image watermarks to any PDF directly in your browser. Control style (font/size/color/opacity), rotation, exact placement, and which pages receive the watermark. Nothing is uploaded—processing is fully local for privacy.

Great for

  • Branding with company logos or document labels (DRAFT, INTERNAL).
  • Protecting sensitive PDFs shared with vendors or clients.
  • Publication workflows that require clear “Not for distribution” stamps.

Privacy & performance

Files never leave your device. Large documents remain responsive thanks to optimized previews and incremental processing.

Tips for perfect results

  • Use ~15–25% opacity for subtle, professional marks that stay readable when printed.
  • Tiled diagonal patterns deter screenshots and cropping better than a single center mark.
  • Prefer transparent PNG logos for clean edges; high-contrast colors improve legibility on scans.
  • Keep margins generous if binding or trimming is expected.

Frequently asked questions

Everything you need to know about watermarking PDFs with PDFToolbox.

Is it safe to add a watermark to my PDF here?⌃

Yes. Everything runs locally in your browser—your PDF never uploads to any server. Your files stay on your device.

Can I use both text and image watermarks?⌃

Absolutely. Add a text watermark (e.g., CONFIDENTIAL) or upload a PNG/JPG logo as an image watermark.

Can I apply the watermark to only selected pages?⌃

Yes. By default it applies to all pages, but you can select specific pages via the thumbnail grid.

Do you support tiled or diagonal watermarks?⌃

Yes. You can rotate watermarks, place them in corners or center, and use a tiled pattern across the page.

Will the PDF quality change?⌃

The content remains intact. Only the watermark layer is added. File size may increase slightly depending on watermark complexity.

Is this tool free?⌃

100% free—no sign-up, no upload limits, and privacy-first.