Add Watermark to PDF Online

Stamp text or image watermarks onto every page of your PDF. Adjust opacity, rotation, position. Free, fast, and runs in your browser.

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Maximum file size: 10MB

A watermark is a semi-transparent stamp — text or image — overlaid on every page of a PDF. It serves several purposes: marking documents as "DRAFT" or "CONFIDENTIAL" so readers know not to circulate them, branding documents with a company logo, asserting copyright on creative work, or making it harder to pass off a document as a final version when it isn't. Dokfo's free PDF watermark tool lets you add either text watermarks (with custom font, size, color, and rotation) or image watermarks (your logo, signature, seal, or any PNG/JPG). Adjust opacity so the watermark is visible without blocking the underlying content, set position (center, corners, or tiled across the page), and choose rotation angle. Apply to every page in one operation. The watermark is baked into the PDF as a layer on top of the original content. Recipients see it in every PDF reader, on every device, and it can't be hidden by viewer settings. Useful for any document where you need a persistent visual mark — confidentiality notices, draft labels, branding, or copyright assertion.

How to Add a Watermark — Step by Step

1

Upload your PDF by clicking the upload area or dragging the file. Dokfo loads it locally and previews the first page so you can see watermark placement.

2

Enter watermark text (e.g., "DRAFT", "CONFIDENTIAL", company name) or upload an image (logo, signature, stamp). Adjust opacity, font size, rotation angle, and position.

3

Click "Apply". The watermarked PDF downloads automatically with the watermark stamped on every page as a permanent overlay.

Why Watermark PDFs With Dokfo?

Text or Image Watermarks

Stamp text ("DRAFT", "CONFIDENTIAL", company name) or upload an image (logo, signature, official seal). Both modes available with full customization.

Customizable Appearance

Set font, size, color, opacity (0-100%), rotation angle (0-360°), and position (corners, center, tiled). Watermark exactly the way you need it for your document.

Applies to All Pages

One operation stamps every page in your PDF. No need to apply page by page — the watermark appears consistently throughout the document.

Browser-Based Privacy

Watermarking happens locally with pdf-lib. Your PDF and watermark image never leave your device, which is essential for confidential or branded documents.

When to Add a Watermark

Mark documents as "DRAFT", "CONFIDENTIAL", or "FOR REVIEW ONLY" before circulating to internal teams or external reviewers.
Brand reports, proposals, and white papers with your company logo or wordmark for professional consistency.
Assert copyright on creative work — photographs, designs, manuscripts — by overlaying a copyright notice or signature.
Add an official seal or stamp to legal, government, or institutional documents that require verification marks.
Discourage unauthorized use of leaked documents by making them visibly identifiable as belonging to a specific organization.

Watermarking Stays on Your Device

Dokfo's watermark tool runs 100% client-side using pdf-lib. Your PDF and any watermark image you upload are processed in browser memory, the watermark is added as a layer on top of each page, and the watermarked PDF is saved back to disk — without any server round-trip. This makes the tool safe for confidential documents and proprietary brand assets. Verify in Developer Tools → Network tab: zero data transmission.

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Frequently Asked Questions About Watermarking

How do I add a watermark to a PDF?

Upload your PDF, enter watermark text or upload an image, adjust the settings (opacity, rotation, position), and click apply. The watermarked file downloads automatically with the watermark stamped on every page.

Can I customize the watermark appearance?

Yes. For text watermarks: font size, color, opacity, rotation angle, and position. For image watermarks: opacity, scale, rotation, and position. Full customization for both modes.

Can I add an image watermark like a logo?

Yes. Upload a PNG (with transparency) or JPG. The image is overlaid on every page at the position and opacity you choose. Useful for company logos, official seals, or signatures.

Will the watermark appear on every page?

Yes by default. The watermark is stamped on every page in one operation. If you need page-specific watermarks, apply once for the global watermark, then use other tools to add page-specific overlays.

Is the watermark removable by recipients?

No, not easily. The watermark is baked into the PDF as part of the page content stream. While determined users with PDF editing software could attempt to remove it, casual recipients cannot.

Are my files uploaded?

No. Watermarking happens entirely in your browser using pdf-lib. Your PDF and watermark image never leave your device.

Can I watermark password-protected PDFs?

Remove the password first using Dokfo's Unlock PDF tool, then watermark. Encrypted streams can't be modified directly.

Will Dokfo add its own watermark?

Never. Dokfo only adds the watermark you configure — never any branding or attribution of its own.