Will text under the watermark remain readable?

Yes, you can adjust the opacity slider from 5% to 100% to ensure underlying document text remains perfectly legible.

Can I tile the watermark across the entire page?

Yes! Select the "Repeated Grid (Tile)" position layout to prevent unauthorized cropping or removal.

What image formats can be used as logo watermarks?

You can upload transparent PNG or JPG files, which will be scaled and positioned cleanly across your PDF pages.

100% Client-Side Privacy • Zero Server Uploads

Add Watermark to PDF Online

Protect intellectual property and brand your documents. Add text stamps or company logos with custom opacity, rotation, and positioning.

Drop your PDF here to add a watermark

Supports text and logo stamps. 100% processed locally in your browser.

100% Client-Side Privacy•Free & Unlimited•Up to 100MB

About Watermark PDF with PDFAtlas

Watermarking is crucial for protecting sensitive drafts, confidential financial statements, proprietary reports, and legal agreements. PDFAtlas allows you to apply high-visibility or subtle watermarks in seconds.

Choose custom text (such as "CONFIDENTIAL", "DRAFT", or "SAMPLE") or upload your high-resolution PNG/JPG logo. Configure exact opacity, diagonal angles, and tiled grid repetition.

Text & Logo Stamps

Support for custom text strings or company image logos.

Full Opacity & Angle Control

Customize diagonal angles and transparency.

Zero Server Uploads

Processed 100% in your local browser sandbox.

How to Use Watermark PDF

Follow three simple steps to complete your document task without installing software or creating an account.

Upload PDF Document

Drop your PDF file into the watermarking workspace.

Customize Watermark

Type text or upload a logo, then adjust rotation, color, opacity, and page placement.

Download Watermarked PDF

Click "Apply Watermark" to generate and download your secured document.

Local Browser Privacy

Files are processed directly inside your browser. No files are uploaded or stored on remote servers.

Blazing Fast Execution

Zero network upload delays. PDF operations execute instantly using high-performance WebAssembly and JavaScript engines.

Works on Any Device

Fully optimized for desktop, tablet, and mobile browsers on Windows, macOS, iOS, and Android.

Frequently Asked Questions

Clear answers to common questions about Watermark PDF and PDFAtlas security.

Yes! You can choose between "All Pages" or enter custom page numbers/ranges (e.g. 1-5, 8).