Add Watermark to PDF

Add Watermark to PDF is a free online tool for stamping text or logo watermarks onto PDF files, with batch support for multiple documents. Position, size, color, opacity, and rotation are all adjustable, and every change shows up in the live preview instantly. All processing happens locally in your browser — files are never uploaded to a server, so even sensitive documents stay safe.

Key Features

• Text watermark: type words like "CONFIDENTIAL" or "For review only", with multi-line support, font size from 12 to 96, and a color picker with common presets.
• Image watermark: upload a PNG, JPG, or WebP logo (transparent PNG recommended), with adjustable width from 40 to 360 pt for brand marks.
• Four layouts: tile (repeated across the page with adjustable spacing), center (a single stamp in the middle), 3×3 grid (evenly spread), and corners + center (five stamps) — covering needs from anti-piracy to light branding.
• Opacity and rotation: sliders from 5% to 80% opacity and 0° to 360° rotation keep the watermark visible without blocking the content.
• Custom page range: apply to all pages or specific ones, with range syntax like 1-3,5,8-10.
• Live preview: before uploading, a sample page shows the watermark style; after uploading, the real page renders in the preview, and you can switch between files.
• Batch processing and ZIP download: multiple PDFs are processed in a queue with progress and can be stopped anytime; each result can be previewed and downloaded separately, or all packed into one ZIP.

Use Cases

• Marking contracts, bids, and quotes as "Confidential" or "Copy" before sending.
• Adding your name or organization to courseware, e-books, and designs to deter reposting.
• Applying a unified company logo watermark to business documents.
• Watermarking only the cover page or a few selected pages.

How to Use

1. Click or drag one or more PDFs into the upload area.
2. Choose the watermark type: enter text, or upload a logo image.
3. Set the layout, opacity, rotation, and page range if needed — the preview updates in real time.
4. Click "Start watermarking" and wait for the batch to finish.
5. Preview and download each result, or click "Download All (ZIP)" to save them together.

FAQ

Q: Is this tool free?

A: Yes, completely free. No registration or software installation is required.

Q: Are my files safe? Are they uploaded to a server?

A: No. Watermarking runs entirely in your browser; neither the PDFs nor the logo image are uploaded, and nothing is kept after you close the page.

Q: Can I watermark a password-protected PDF?

A: Not yet. Please remove the password before uploading the file.

Q: How many files can I process at once?

A: You can add multiple PDFs; they are processed in a queue with visible progress, and finished results can be packed into a single ZIP.

Q: Which image format works best for a logo watermark?

A: PNG, JPG, and WebP are all supported. A transparent PNG is recommended so the watermark blends naturally over text.

Q: Does it work on mobile?

A: Yes. The page is mobile-friendly — uploading, adjusting settings, previewing, and downloading all work on phones.