Watermark Your PDF
Max 100MB | Text watermarks only
PDF Watermarked Successfully
Problem: Unsafe PDF Sharing
Sharing unmarked PDFs — contracts, proposals, financial reports, legal documents, or creative proofs — creates real risk:
- Someone can forward your document without anyone knowing it came from you
- Drafts get mistaken for final versions
- Confidential materials can be leaked without attribution
- Most online watermark tools upload your sensitive files to their servers (privacy risk)
- Desktop software costs $100+ per year for something you need once a month
How PDF Watermark Solves This
Add a text watermark to every page of your PDF — CONFIDENTIAL, DRAFT, your company name, or any custom text — before sharing. All processing happens in your browser with pdf-lib. Your document never leaves your device.
- 100% private: PDF processed locally, never uploaded
- 6 one-click presets: Common watermarks ready to use
- Full control: Font size, color, opacity, rotation, position, and tile mode
- No limits: Unlimited PDFs, no signup, no daily caps
- Preserves content: Text, form fields, and annotations remain selectable
Why AI Chatbots Can't Watermark PDFs
Large Language Models cannot modify binary PDF files. Adding a watermark requires parsing the PDF structure, embedding fonts, calculating page coordinates, and rendering text onto each page — operations that require actual code execution with a library like pdf-lib. AI can suggest how to do it, but cannot produce the watermarked PDF. This tool delivers the real binary output.
How to Use
- Drop any PDF file into the upload area
- Choose a preset or type custom watermark text
- Adjust font size, opacity, rotation, color, and position
- Enable tile mode for full-page coverage (optional)
- Click "Apply Watermark & Download"
Frequently Asked Questions
Is this tool completely free? Any limits?
Yes, 100% free with no limits. Unlike Smallpdf (2 tasks/day), iLovePDF (upload + daily limits), or Adobe Acrobat ($240/year subscription), our PDF watermark tool has zero restrictions — unlimited files, no signup, no hidden fees.
Does my PDF get uploaded to a server?
No. Everything runs in your browser using the pdf-lib library. Your file never leaves your device. You can verify this by opening DevTools (F12 → Network tab) — you'll see zero outbound requests carrying your data.
Can I add an image/logo watermark?
This version supports text watermarks only. Image watermark support is planned. For now, you can use text watermarks with custom colors and fonts that match your brand.
Will the watermark be removable?
The watermark is drawn into the PDF page content. While a determined person with Adobe Acrobat Pro could potentially edit or remove it, the watermark serves as a clear visual deterrent and attribution marker. For maximum protection, combine with PDF password protection.
Does watermarking increase file size?
Minimally. Text watermarks add only a few KB per page (the font reference + text positioning data). For a 10-page document, expect less than 50KB increase.
What is tile mode?
Tile mode repeats the watermark across the entire page in a grid pattern, creating a security-paper effect. This is useful for highly confidential documents where you want the watermark to survive cropping or screenshotting.
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