Add Watermark to PDF Online
Stamp any PDF with a text watermark — CONFIDENTIAL, DRAFT, COPY, or your own text. Choose opacity, color, and position.
Drop your PDF here or click to upload
PDF files only — max 10MB free / 100MB Pro
ToolSnap PDF Watermark is a free online tool that lets you stamp any PDF with a custom text watermark — no software installation, no account required. Use it to mark sensitive documents as CONFIDENTIAL, label proofs as DRAFT, or brand copies with SAMPLE. You can choose between diagonal (45°) and horizontal placement, adjust the opacity from subtle to bold, and pick from gray, red, or blue text color. All pages are watermarked at once and your file is ready to download in seconds.
How to Add a Watermark to a PDF
- Upload your PDF by dragging it into the box or clicking to select
- Type your watermark text or choose a preset (CONFIDENTIAL, DRAFT, etc.)
- Set opacity, position, and color to your preference
- Click "Add Watermark" and download your stamped PDF
Frequently Asked Questions
Is this PDF watermark tool free?
Yes, completely free. No account required, no extra watermarks added by ToolSnap.
Can I use my own custom watermark text?
Yes. Type any text up to 30 characters. Common presets like CONFIDENTIAL, DRAFT, COPY, and SAMPLE are available with one click.
What opacity levels are available?
Light (subtle, barely visible), Medium (balanced), and Strong (bold and clearly visible).
What is the maximum file size?
Free users can process PDFs up to 10MB. Pro users get up to 100MB.
Are my files stored on your servers?
No. Your PDF is processed and immediately deleted. We never store your files.