Add Watermark to PDF Online Free
Stamp your PDFs with custom text watermarks like CONFIDENTIAL or DRAFT. Fully private — files never leave your device.
Last Updated: August 2, 2026
Drop your PDF here
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Supported: PDF files, any size
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Open ToolHow to Use Toolza’s Free Add Watermark
Follow these simple steps to get your result in seconds.
Upload PDF
Drag and drop your PDF into the upload area or click to browse.
Type Watermark
Enter your watermark text and pick size, opacity, color, and position.
Click Add Watermark
The watermark is stamped onto every page of your document instantly.
Download
Save your watermarked PDF with one click — no signup required.
Why Use Toolza’s Free Tool?
Browser-based, private, and completely free — no catches.
100% Private & Secure
Your files never leave your device. All processing happens locally in your browser — no uploads, no servers, no data storage.
Completely Free
No hidden charges, no premium plans, no watermarks. Every feature is free forever.
Works on Any Device
No installation needed. Works on desktop, tablet, and mobile browsers.
No Signup Required
Start using the tool immediately. No accounts, no emails, no personal data.
High Quality Output
Results preserve original quality and formatting.
Lightning Fast
Everything runs locally, so results are instant even for large files.
Why Add a Watermark to Your PDF?
Watermarking is the fastest way to mark a document as confidential, protect your work from misuse, or brand files before sharing them. A single watermark applied across every page makes it clear who owns the document and discourages unauthorized distribution.
Common uses for PDF watermarks
- Confidential files: Stamp drafts, NDAs, and internal documents with CONFIDENTIAL or PRIVATE.
- Work in progress: Label drafts as DRAFT, REVISION, or PROOF so recipients know the content is not final.
- Branding: Add your company or website name to documents you share publicly.
- Copyright protection: Discourage unauthorized copying of your reports, e-books, and images.
Why browser-based watermarking is safer
Desktop watermark software often uploads your documents to a remote server, which is risky for sensitive files. Toolza processes your PDF entirely in your browser — your document never travels over the internet, so nothing can be intercepted, stored, or reused.
Frequently Asked Questions
Yes, Toolza’s PDF watermark tool is 100% free forever. No hidden fees, no premium tiers, no watermarks added by us, and no file limits.
No. Everything runs entirely in your browser using the pdf-lib JavaScript library. Your file never leaves your device — nothing is uploaded, stored, or transmitted.
This tool adds text watermarks. For image watermarks, use the Sign PDF tool to draw and place graphics on your document.
Only if you want it to. You can set low opacity (10–40%) for a subtle stamp that stays readable, or higher opacity for strong protection. You can also pick a diagonal position to spread it across the page.
No. The original text, images, fonts, and layout are preserved exactly. The watermark is simply drawn on top of each page.
No — password-protected PDFs must be unlocked first. Use the Unlock PDF tool, then come back and add your watermark.
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