How to Add a Watermark to a PDF Online for Free
Watermarks protect your documents, signal their status, and discourage unauthorized copying. Adding a CONFIDENTIAL, DRAFT, or custom watermark to any PDF takes seconds — no software, no Acrobat Pro, no signup required.
Add watermark to your PDF — free
Custom text, opacity, angle. Upload and download in seconds.
Why Watermark Your PDFs?
Watermarks serve several important purposes. A "CONFIDENTIAL" stamp warns recipients that the document shouldn't be shared further. A "DRAFT" watermark prevents a working version from being mistaken for the final, approved document. A company name or logo watermark deters unauthorized copying and establishes ownership.
They're commonly used on legal contracts sent before signing, early product mockups shared with clients for review, proprietary reports shared with third parties, and any document that needs clear status labeling.
How to Add a Watermark in 4 Steps
ToolSnap PDF Watermark stamps your document instantly, entirely in the browser.
Best Watermark Text Options
🔒 CONFIDENTIAL
The most universally recognized watermark. Use for sensitive documents shared with limited recipients who should not redistribute them.
📝 DRAFT
Signals that the document is a work-in-progress. Prevents recipients from treating an early version as the final, approved output.
✅ APPROVED
Marks the document as the final, signed-off version. Useful when multiple versions have circulated and you need to distinguish the official one.
🏢 Company Name
Establishes brand ownership and deters unauthorized distribution or reuse of proprietary content.
⚠️ FOR REVIEW ONLY
Appropriate for documents sent for comment or feedback that should not be acted upon yet.
Diagonal vs Horizontal Watermark
Diagonal (45°) is the most common choice. It runs across the entire page and is visible in every reading orientation — landscape or portrait. It's harder to crop out and immediately catches the eye, making it the best choice for CONFIDENTIAL or DRAFT stamps.
Horizontal (0°) is less intrusive and better for subtle branding — a company name in light gray at the center of each page, for instance. It's easier to read but also easier to overlook, which suits use cases where the watermark is informational rather than protective.
Frequently Asked Questions
Can the watermark be removed?
Text watermarks added to PDFs are embedded in the page content and cannot be removed with standard PDF editors. However, they are not a security measure against determined bad actors with advanced tools — for strong protection, combine watermarks with PDF password protection.
Will the watermark cover my document's content?
Watermarks are set at a semi-transparent opacity (typically 20–40%) so the underlying text and images remain clearly readable. You can adjust the opacity in the tool to make it more or less visible.
Can I watermark all pages at once?
Yes — by default, ToolSnap applies the watermark to every page in the document in one operation.
What file size limit applies?
Free users can upload PDFs up to 5MB. Pro users get up to 20MB per file.
Is my PDF kept private after upload?
Yes. ToolSnap processes your file and deletes it immediately after generating the watermarked version. Your document is never stored or accessed by our team.
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