Add Watermark to PDF

Add text or image watermarks to your PDF documents. Customize opacity, rotation, and placement.

Add Watermark to PDF

Click or drag to Upload PDF

Your file is processed securely in your browser — never uploaded

How to use Add Watermark to PDF

1
Upload the PDF file.
2
Choose to add either a Text or an Image watermark.
3
Customize the text content, color, scale, and rotation.
4
Click "Add Watermark" to apply it to all pages and download.

Frequently Asked Questions

Can I add an image as a watermark?

Yes — upload a PNG or JPG, set the scale and opacity, and it stamps across all pages. PNG with a transparent background works best for logo watermarks.

Can I control the opacity so the content stays readable?

Yes — the opacity slider lets you set transparency from nearly invisible (5%) to fully opaque (100%). A setting of 20–30% is typical for "draft" or branding watermarks.

Does the watermark appear on all pages?

Yes — the watermark is applied to every page in the document.

Can I position the watermark precisely?

Yes — choose from preset positions (center, corner, diagonal) or set a custom X/Y position and rotation angle.

Is the watermark permanent?

Yes — once added and the PDF downloaded, the watermark is embedded directly into the document and cannot be easily removed without specialized tools.

Is my document uploaded to any server?

No — all watermarking runs locally using pdf-lib in your browser. Your documents stay on your device.

Detailed Guide

Mark Your Documents Before They Leave Your Hands

A proposal goes to a prospect before the deal is closed — you want DRAFT visible on every page. A preview of creative work goes to a client who hasn't paid yet — your logo watermark needs to be there. A sensitive report is distributed internally — CONFIDENTIAL should appear diagonally across each page.

Watermarks communicate status, assert ownership, and deter misrepresentation. This tool applies them to every page of your PDF using customizable text or your own logo image — processed entirely in your browser, never uploaded.

Text vs. Image Watermarks

Text watermarks are fast to set up — type your text (DRAFT, CONFIDENTIAL, SAMPLE, your company name) and customize font size, color, opacity, and rotation angle. A diagonal layout at 45° covers the page most effectively for protection purposes.

Image watermarks let you use your company logo, signature, or graphic as a semi-transparent overlay. Upload a PNG with a transparent background for the best result — the logo appears over the page content without a white rectangle around it.

	Text Watermark	Image Watermark
Setup time	Seconds	Requires logo file
Use case	Status labels (DRAFT, CONFIDENTIAL)	Brand identity, ownership
Best format	Any text	PNG with transparency
Opacity control	✅	✅
Rotation control	✅	Positioning only

Opacity as a Design Decision

Opacity is the most important setting. Getting it right depends on what the watermark is for:

10–20% opacity — subtle branding. A company logo at this opacity is present but doesn't interfere with reading. Used on client-facing documents where you want brand presence without obscuring content.

30–50% opacity — visible marking. "SAMPLE" or a logo is clearly visible at normal viewing distance. Content remains readable underneath.

60–80% opacity — strong security marking. CONFIDENTIAL or DRAFT at this level is unmistakable. The underlying content is still legible but the watermark dominates.

90–100% opacity — opaque stamp. Used for very specific cases where the watermark is meant to fully obscure content beneath it (less common).

How Watermarks Are Applied

The tool uses pdf-lib to modify PDF page content streams directly — it doesn't re-render pages as images (which would degrade text quality and remove selectability).

For text watermarks: