Add Watermark to PDF Free Online

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Add Watermark to PDF (Free)
Free Forever No Upload Browser-Based Custom Text
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Upload
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Options
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Convert
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Download
Processing…
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Drop your PDF here
or click to browse · opens watermark editor
PDF files up to 500MB
💧 Add Watermark
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Text Watermark
35%
⚡ No sign-up required
🌐 Works in any browser
💯 Completely free

Frequently Asked Questions

Is Add Watermark to PDF really free? ▾
Yes, 100% free. No account needed, no watermarks, no limits on file size imposed by us.
Do my files get uploaded to a server? ▾
Never. All processing happens 100% inside your browser using JavaScript. Your files never leave your device.
Which browsers are supported? ▾
Any modern browser — Chrome, Firefox, Edge, Safari on desktop and mobile.
Is there a file size limit? ▾
No server-imposed limit. Processing depends on your device's memory and browser. Most PDFs under 200 MB work perfectly.
How is this better than or ? ▾
ConvertPDF.Live processes files entirely in your browser — nothing is uploaded, so your files stay private.
We're always improving ConvertPDF.Live. If you need a tool that's not here, want to report a bug, or have ideas — we'd love to hear from you!
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Free PDF Watermark Tool Online — No Upload at ConvertPDF.Live

Protect your documents or brand your PDFs with ConvertPDF.Live's free PDF watermark tool. Add a custom text or image watermark to every page of your PDF — set opacity, angle, font size, and color with a live preview before downloading. No upload to any server, no sign-up, and completely free. Perfect for marking confidential documents, branding business reports, or adding "Draft" stamps to proofs. The watermark is embedded permanently in the PDF. All processing runs locally in your browser at convertpdf.live, ensuring your document content stays 100% private.

  • ✓ Add text or image watermark to PDF free
  • ✓ Customize opacity, angle, font size & color
  • ✓ Live preview before downloading
  • ✓ Watermark applied to all pages at once
  • ✓ Browser-based — document never uploaded to server
  • ✓ No account or installation required
Frequently Asked Questions
Can I add an image watermark like a logo to my PDF? ▼
Yes — upload an image (PNG, JPG) and it will be used as a watermark, applied to every page with your chosen opacity and position.
Is the PDF watermark tool completely free? ▼
Yes — completely free, no hidden costs, and no sign-up required at ConvertPDF.Live.
Can I set opacity for the watermark? ▼
Yes — use the opacity slider to make the watermark as transparent or opaque as you need.
Is my PDF document kept private? ▼
Your file is processed locally in your browser using PDF-lib. It is never sent to any server — your content stays private.
Will the watermark appear on all pages? ▼
Yes — the watermark is applied uniformly to all pages in the PDF, maintaining consistent positioning and styling.
🔗 Related Free PDF Tools
🔒 Protect PDF✏️ Edit PDF✍️ Sign PDF📖 Blog: How to Add Watermark to PDF

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