How do I add a watermark to my PDF?

Upload your PDF, enter your watermark text, customize the appearance (size, color, opacity, rotation), choose the position, then click 'Apply Watermark' to download your watermarked PDF.

What is the tile pattern option?

Tile pattern repeats your watermark text across the entire page in a diagonal grid pattern. This is commonly used for CONFIDENTIAL or DRAFT watermarks to cover the whole document.

Can I adjust the watermark transparency?

Yes! Use the opacity slider to adjust transparency from 5% to 100%. Lower values make the watermark more subtle, while higher values make it more prominent.

Is my PDF safe when adding watermarks?

100% safe. All processing happens locally in your browser using pdf-lib. We don't upload, store, or have access to your files.

Add Watermark to PDF Online Free

About PDF Watermark Tool

Add a watermark to PDF files online free with FreeToolBox — stamp your PDFs with custom text (like 'CONFIDENTIAL', 'DRAFT', or your company name) or a logo image, controlling opacity, position, rotation, and font size. Watermarking PDFs is essential for protecting confidential documents before sharing, marking drafts, or branding your company's materials. Our tool embeds the watermark directly into every page using PDF-lib.

All watermarking happens locally in your browser — your PDF is never uploaded to any server. The output PDF has your watermark cleanly embedded with no secondary watermark from FreeToolBox. Completely free, no account required.

Best use cases for PDF watermarking

Draft reviews and internal approvals — Mark files as DRAFT before circulating them for feedback so no one mistakes them for final versions.
Contracts, proposals, and quote sheets — Add CONFIDENTIAL or INTERNAL USE markings before sharing with clients, vendors, or teammates.
Invoices and branded paperwork — Add a company logo or ownership mark to exported PDF documents before delivery.
Training, sales, and public handouts — Stamp educational or marketing PDFs with branding, versioning, or controlled-distribution text.

When should you use PDF Watermark vs other PDF tools?

Use PDF Watermark when the document itself is ready, but you need ownership, review status, or sharing control added on top. If the file is still too large after watermarking, continue with PDF Compress. If you only want to mark selected pages, isolate them first with PDF Split. If you need to combine multiple branded PDFs afterward, use PDF Merge.

Compared with upload-first tools like Smallpdf or iLovePDF, FreeToolBox applies the watermark locally in your browser. That matters for draft contracts, invoice packets, internal reports, and confidential review materials you should not upload unless absolutely necessary.

Continue your PDF workflow: visit the PDF Tools hub for watermark, merge, split, compress, and conversion tasks in one place.

Frequently Asked Questions

Can I use an image (logo) as a PDF watermark?

Yes. Upload a PNG or JPG logo and it will be placed as an image watermark on each page. For best results use a PNG with a transparent background.

What opacity should I use?

For confidential stamps: 30–50% opacity is standard. For full-page diagonal draft watermarks: 15–25% keeps text readable underneath while marking the document clearly.

Is the watermark applied to all pages?

Yes. The watermark is added to every page. To watermark only specific pages, split them with PDF Split, watermark, then re-merge with PDF Merge.

Is my PDF uploaded to a server?

No. PDF-lib processes your file entirely in the browser. Your document never leaves your device.

Add Watermark to PDF - Text & Image

Watermark Added!

Why Use Our PDF Watermark Tool?

Frequently Asked Questions

Related PDF Tools

About PDF Watermark Tool

Best use cases for PDF watermarking

When should you use PDF Watermark vs other PDF tools?

Frequently Asked Questions