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pdf100% Browser-BasedUpdated Jul 2026

Add Watermark to PDF

A premium, privacy-first PDF watermarking tool that works entirely in your browser. Upload any PDF and add beautiful text or image watermarks with full control over position, opacity, rotation, font, size, color, and more. See every change in real time with the live preview. Choose from 9 preset positions, drag to place the watermark anywhere, or create repeating tile patterns. Apply watermarks to all pages, specific pages, even/odd pages — all processing happens locally, your files never leave your device.

Your Files Never Leave Your Device

All PDF watermarking happens entirely in your browser. Your files are never uploaded to any server.

Upload PDF File

Drag & drop a PDF file here, or click to browse.

PDF onlyUp to 250.0 MBPrivate · never uploaded

Frequently Asked Questions

Everything you need to know about adding watermarks to PDF files

How does browser-based PDF watermarking work?
PDF watermarking happens entirely in your browser using JavaScript. When you upload a PDF, we render a preview using pdf.js for the live editor. When you apply the watermark, pdf-lib draws the text or image watermark onto each page of the PDF document. No data is ever sent to any server — your files remain on your device at all times.
What types of watermarks can I add?
You can add text watermarks with full typography control (font, size, bold, italic, color, opacity, rotation) or image watermarks using JPG, PNG, or SVG files with resize, opacity, rotation, and scale controls. Both types support positioning presets, custom placement, and tile/repeat patterns.
Can I see a preview before applying the watermark?
Yes! The live preview is the centerpiece of this tool. As you change any setting — text, font, size, opacity, rotation, position — the watermark updates instantly on the page preview. This lets you perfect your watermark before applying it to the final PDF.
How do I position the watermark?
Choose from 9 preset positions (Top Left, Top Center, Top Right, Center Left, Center, Center Right, Bottom Left, Bottom Center, Bottom Right) or select Custom to place the watermark anywhere on the page using drag and precise X/Y controls.
Can I apply watermarks to specific pages?
Yes. You can apply the watermark to All Pages, First Page Only, Last Page Only, Even Pages, Odd Pages, or a Custom Page Range (e.g., 1-5, 8, 11-13). This gives you full control over which pages are watermarked.
Does watermarking affect PDF quality?
No. The original PDF content remains unchanged — the watermark is drawn on top of or behind the existing content. Text, images, fonts, and formatting are preserved exactly as they were in the original document. The only addition is the watermark itself.
Can I create tiled or repeating watermarks?
Yes. Choose the 'Repeated' watermark style to create a tile pattern across the entire page, or 'Diagonal' for watermarks arranged diagonally. This is perfect for 'DRAFT', 'CONFIDENTIAL', or 'SAMPLE' watermarks that cover the full page.
What is the maximum PDF size I can process?
The tool supports PDFs up to 250MB. For very large documents with hundreds of pages, processing may take longer as each page needs to be individually watermarked. The animated progress bar shows real-time status and estimated remaining time.
Can I add both text and image watermarks to the same PDF?
Currently, you can add one watermark type per session. You can choose either a text watermark or an image watermark. For multiple watermarks, process the PDF once with one watermark, then process the output with another.
What makes ForgePlug's PDF Watermark tool different from others?
Our tool features a live preview that updates in real-time as you adjust settings — no need to click 'Apply' just to see changes. Combined with drag-based positioning, 9 position presets, tile patterns, full font controls, and a beautiful interface inspired by Canva and Adobe, it offers a premium desktop-app experience entirely in your browser. Plus, your files never leave your device.

How PDF Watermarking Works

Learn about adding watermarks to PDF documents and best practices

What is a PDF Watermark?

A watermark is a recognizable image, text, or pattern that appears on the pages of a document. Watermarks are commonly used to indicate the status of a document ('Draft', 'Confidential', 'Sample'), protect intellectual property, identify the document owner, or brand the document with a company logo. Watermarks can appear in the background (behind content) or foreground (above content) and can vary in opacity, size, and rotation.

Best Practices for PDF Watermarking

For optimal results, use semi-transparent watermarks (30-50% opacity) that don't obscure the document content. Position watermarks diagonally across the center for maximum visibility without disrupting readability. For confidential documents, consider using a tiled pattern with repeating text. Choose colors that contrast with your document — dark gray for light pages, light gray for dark pages. Test your watermark on a single page first before applying to the entire document.

Text vs Image Watermarks

Text watermarks are created using PDF fonts directly in the document — they remain sharp at any zoom level and have minimal file size impact. Image watermarks use uploaded JPG, PNG, or SVG files and offer more visual flexibility (logos, graphics, signatures), but may slightly increase the PDF file size. For most use cases, text watermarks are recommended for their clarity and efficiency. Image watermarks are ideal when you need to add a company logo or brand mark.

Frequently Asked Questions

Everything you need to know about watermarking PDFs

How does browser-based PDF watermarking work?
PDF watermarking happens entirely in your browser using JavaScript. When you upload a PDF, we render a preview using pdf.js for the live editor. When you apply the watermark, pdf-lib draws the text or image watermark onto each page of the PDF document. No data is ever sent to any server — your files remain on your device at all times.
What types of watermarks can I add?
You can add text watermarks with full typography control (font, size, bold, italic, color, opacity, rotation) or image watermarks using JPG, PNG, or SVG files with resize, opacity, rotation, and scale controls. Both types support positioning presets, custom placement, and tile/repeat patterns.
Can I see a preview before applying the watermark?
Yes! The live preview is the centerpiece of this tool. As you change any setting — text, font, size, opacity, rotation, position — the watermark updates instantly on the page preview. This lets you perfect your watermark before applying it to the final PDF.
How do I position the watermark?
Choose from 9 preset positions (Top Left, Top Center, Top Right, Center Left, Center, Center Right, Bottom Left, Bottom Center, Bottom Right) or select Custom to place the watermark anywhere on the page using drag and precise X/Y controls.
Can I apply watermarks to specific pages?
Yes. You can apply the watermark to All Pages, First Page Only, Last Page Only, Even Pages, Odd Pages, or a Custom Page Range (e.g., 1-5, 8, 11-13). This gives you full control over which pages are watermarked.
Does watermarking affect PDF quality?
No. The original PDF content remains unchanged — the watermark is drawn on top of or behind the existing content. Text, images, fonts, and formatting are preserved exactly as they were in the original document. The only addition is the watermark itself.
Can I create tiled or repeating watermarks?
Yes. Choose the 'Repeated' watermark style to create a tile pattern across the entire page, or 'Diagonal' for watermarks arranged diagonally. This is perfect for 'DRAFT', 'CONFIDENTIAL', or 'SAMPLE' watermarks that cover the full page.
What is the maximum PDF size I can process?
The tool supports PDFs up to 250MB. For very large documents with hundreds of pages, processing may take longer as each page needs to be individually watermarked. The animated progress bar shows real-time status and estimated remaining time.
Can I add both text and image watermarks to the same PDF?
Currently, you can add one watermark type per session. You can choose either a text watermark or an image watermark. For multiple watermarks, process the PDF once with one watermark, then process the output with another.
What makes ForgePlug's PDF Watermark tool different from others?
Our tool features a live preview that updates in real-time as you adjust settings — no need to click 'Apply' just to see changes. Combined with drag-based positioning, 9 position presets, tile patterns, full font controls, and a beautiful interface inspired by Canva and Adobe, it offers a premium desktop-app experience entirely in your browser. Plus, your files never leave your device.

About Watermarking PDFs

A complete guide to watermarking PDF files.

What is a PDF Watermark?

A watermark is a recognizable image, text, or pattern that appears on the pages of a document. Watermarks are commonly used to indicate the status of a document ('Draft', 'Confidential', 'Sample'), protect intellectual property, identify the document owner, or brand the document with a company logo. Watermarks can appear in the background (behind content) or foreground (above content) and can vary in opacity, size, and rotation.

Best Practices for PDF Watermarking

For optimal results, use semi-transparent watermarks (30-50% opacity) that don't obscure the document content. Position watermarks diagonally across the center for maximum visibility without disrupting readability. For confidential documents, consider using a tiled pattern with repeating text. Choose colors that contrast with your document — dark gray for light pages, light gray for dark pages. Test your watermark on a single page first before applying to the entire document.

Text vs Image Watermarks

Text watermarks are created using PDF fonts directly in the document — they remain sharp at any zoom level and have minimal file size impact. Image watermarks use uploaded JPG, PNG, or SVG files and offer more visual flexibility (logos, graphics, signatures), but may slightly increase the PDF file size. For most use cases, text watermarks are recommended for their clarity and efficiency. Image watermarks are ideal when you need to add a company logo or brand mark.

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Runs in your browser100% privateNo data uploaded