Can I control where the watermark is placed on the page?

Yes. Use the 9-point position picker to place the watermark in any corner, edge, or the center of the page. There is also a Diagonal option that places the watermark angled across the center of each page.

Can I change the watermark color and opacity?

Yes. Use the color picker to choose any color, and use the opacity slider to set transparency between 5% and 100%. A low opacity like 20–30% is typical for background watermarks.

Are my PDF files uploaded to a server when I add a watermark?

No. QwikPDF processes everything locally in your browser using JavaScript. Your files never leave your device, ensuring complete privacy.

Free PDF Watermark Tool – Add Text Watermark to PDF Online

How to Add a Watermark to a PDF Online for Free

Three steps. No account. Completely free.

01

Upload Your PDF

Drag and drop one or more PDF files onto the upload area or click Select PDF Files. Every page loads as a visual thumbnail so you can see your content.

02

Configure Your Watermark

Type your watermark text, then choose position using the 9-point grid, set color, opacity, font size, bold/italic style, and rotation angle. Page thumbnails update live as you type.

03

Download the Watermarked PDF

Click Download Watermarked PDF next to any file. Your PDF is rebuilt with the watermark permanently embedded — clean, full quality, instantly downloaded.

Why Use QwikPDF to Add a PDF Watermark?

The most flexible, private, and free way to watermark any PDF.

Custom Text Watermark

Type any text — CONFIDENTIAL, DRAFT, your company name, a copyright notice, or anything you need. Up to 80 characters.

9 Positions + Diagonal

Place your watermark in any of 9 positions — corners, edges, or center — or use Diagonal mode to angle it across the full page like a professional stamp.

Live Page Preview

Every page thumbnail updates instantly as you change any setting. See exactly how the watermark will look before you download — no surprises.

Full Color & Opacity

Pick any color with the native color picker, then set opacity from 5% to 100%. Use low opacity for subtle background watermarks, or full opacity for bold stamps.

100% Private

Your PDF files never leave your browser. All watermark embedding happens locally in JavaScript using pdf-lib — no server, no uploads, ever.

Zero Quality Loss

Watermarks are embedded as native PDF vector elements — not image overlays. Original text, fonts, images and vectors remain completely intact.

Common Uses for PDF Watermarks

Protect, label, and brand your documents in seconds.

🔒 Mark Confidential Documents

Add a CONFIDENTIAL or RESTRICTED watermark to sensitive contracts, reports, or internal documents before sharing them externally.

📝 Label Draft Documents

Stamp DRAFT across PDFs that are still under review so recipients know the document is not yet final or approved.

©️ Add Copyright Notices

Brand your PDFs with your company name, website, or a copyright notice to protect original work from being redistributed without attribution.

🖨️ Mark Proof Copies

Add a PROOF or SAMPLE watermark to preview documents sent to clients before they are approved for final delivery.

📋 Track Document Distribution

Stamp each copy with a recipient name or date before sending — a simple way to trace which version went to whom.

🏢 Brand Company Documents

Add your company name or logo text subtly in the background to reinforce brand identity on every page of client-facing PDFs.

Frequently Asked Questions

Everything about adding watermarks to PDF files online for free.

How do I add a watermark to a PDF online for free?

Upload your PDF, then type your watermark text in the settings panel. Choose position, color, opacity, size, and style — the page thumbnails update live. Click Download Watermarked PDF to save the final file with the watermark permanently embedded.

Can I control where the watermark appears on the page?

Yes. Use the 3×3 position grid to place the watermark in any corner, along any edge, or in the center of the page. You can also click Diagonal to angle the text across the center of each page at 45°.

What opacity should I use for a background watermark?

For a subtle background watermark that doesn't obscure text, 15–30% opacity works well. For a bold, clearly visible stamp, use 60–100%. The live preview helps you find the right balance before downloading.

Are my PDF files uploaded to a server?

No. All processing happens locally in your browser using JavaScript and pdf-lib. Your PDF files never leave your device, so it is safe for confidential, legal, medical, and personal documents.

Can I watermark multiple PDF files at once?

Yes. Upload several PDFs at once. The watermark settings apply to all uploaded files simultaneously. Download each watermarked PDF individually using the button next to each file.

How do I remove the watermark preview?

Click the Clear Watermark button in the settings panel. This resets all watermark settings and restores the original clean thumbnails. The source PDFs are never modified — only the downloaded file contains the watermark.

More Free PDF Tools

Everything you need for working with PDF files — all free and browser-based.

Merge PDFs Split PDF Rotate PDF Organize Pages PDF to Image PDF to JPG

PDF Watermark — Free & Online

Drop your PDF files here to add a watermark