Add Image Watermark to PDF
Stamp your logo, signature, or any image as a watermark across every page of your PDF. Control opacity, position, and size – all in your browser, nothing uploaded.
📄 PDF Document
Click to choose a PDF
or drag and drop it here
🖼️ Watermark Image
Click to choose a PNG/JPEG
or drag and drop it here
How to Add an Image Watermark to a PDF – The Complete Guide
You've got a company logo, a copyright stamp, or a brand mascot that you want to gently place behind every page of a PDF. Maybe you're releasing a preview copy of a report and want to mark it "Draft," or you'd like to reinforce your brand identity with a semi‑transparent logo. Adding a text watermark is fine for simple labels, but an image watermark carries the full visual identity of your brand. The Add Image Watermark tool on eazypdftools.com lets you upload any PNG or JPEG, adjust its opacity, position, and scale, and stamp it across every page of your document—all entirely within your browser. In this guide, I'll explain how the tool works, walk you through each setting, share best practices for professional‑looking watermarks, and answer the most common questions about image watermarking.
How to Use the Add Image Watermark Tool
The tool requires two files: the PDF you want to mark, and the watermark image. Once both are loaded, you can fine‑tune the appearance. Here's the complete workflow:
Step‑by‑step process
- Upload your PDF document. Drag it onto the left upload area or click to browse. A small preview of the first page appears, confirming you've selected the correct file. The PDF remains untouched; the tool will create a new watermarked copy.
- Upload your watermark image. Drag your PNG or JPEG file onto the right upload area. For best results, use a PNG with a transparent background—for example, a logo saved with alpha transparency. The image appears as a thumbnail. If you use a JPEG, any white areas in the image will appear as solid white rectangles on the PDF, so PNG is strongly preferred.
- Choose the position. Use the dropdown to decide where the image should appear. Options include Center (a single, centered instance), Tile (repeated across the page), Top Left, Top Right, Bottom Left, Bottom Right, and Diagonal (one large instance rotated 45° and placed in the center, similar to a classic "DRAFT" stamp). The tile option is great for a subtle repeating pattern, while center or diagonal works well for a bold, singular mark.
- Adjust the opacity and scale. The opacity slider controls how transparent the watermark appears—from 5% (barely visible) to 100% (fully opaque). A setting between 30% and 60% is usually ideal: visible enough to be noticed, but not so heavy that it obscures the text underneath. The scale input sets the watermark's width as a percentage of the page width. For a center‑placed logo, 25‑40% is often appropriate. For tiling, a smaller value (10‑20%) creates a denser pattern.
- Click Apply Watermark & Download. The button activates once both files are loaded. Press it, and the tool places the image on every page according to your chosen settings, embedding it with the exact opacity and size you specified. The processed PDF is saved to your device, and your original files remain unchanged.
Tips & Tricks for Professional Image Watermarks
Here are practical tips to ensure your image watermark enhances your document without becoming a distraction.
1. Always use PNG with a transparent background
A JPEG file, even if it looks white, will carry an opaque white rectangle when placed onto a PDF page. This creates an ugly box around your logo. A PNG with transparency, on the other hand, lets the original page show through around your logo, blending naturally. If your current logo is a JPEG, use a simple image editor (even online) to convert it to PNG and remove the background before uploading. The result will look far more professional.
2. Start with a lower opacity and increase if needed
It's easier to make a watermark more visible than to undo an overly bold one. Begin with an opacity of 30‑40%, apply it to a test page, and check the result. If you can still read the text comfortably and the brand mark is recognizable, you've found the right balance. For official documents that must remain fully legible, keep opacity under 40%. For purely decorative or preview purposes, 50‑70% can work.
3. Match the scale to the page size
A logo that looks perfect at 30% of an A4 page might appear enormous on a letter‑sized page or tiny on a landscape presentation. The tool's scale is relative to the width of the page, so a setting of 30% means the watermark will be 30% of whatever page width it is placed on. For documents with mixed page sizes, the watermark will automatically adjust proportionally—you don't need to create separate watermarked files for each page size.
4. Tile for a repeating pattern, center for a statement
If you want a subtle background texture (like a faint logo pattern), choose the Tile option with a small scale (around 10‑15%) and low opacity (20‑30%). This creates a watermark that covers the page without any single instance drawing too much attention. Conversely, the Center or Diagonal options work best for a bold "DRAFT" or "CONFIDENTIAL" stamp where the watermark is the message.
5. Test the output in a PDF reader that supports overprinting
Most modern PDF readers render watermarks correctly, but some older or mobile viewers may display them differently. After downloading, open the file in at least two different applications—for example, Adobe Acrobat and a browser's built‑in PDF viewer—to confirm the watermark appears as expected. If you notice the watermark missing or incorrectly positioned in a particular viewer, try changing the position or opacity slightly and re‑processing.
Frequently Asked Questions
Is the Add Image Watermark tool free?
Yes, completely free with no watermark, no page limit, and no account required. The site is supported by non‑intrusive ads, but you’ll never be asked to pay.
Are my files uploaded anywhere?
No. All processing happens inside your browser (client‑side). Your PDF and image never leave your device, and we never see, store, or upload them.
What image formats can I use as a watermark?
You can upload PNG or JPEG images. PNG with transparency (e.g., a logo with a clear background) works best because it blends seamlessly into the page without a white box.
Can I control how the watermark looks?
Yes. You can choose a position (center, tiled, corner, diagonal), adjust the opacity from barely visible to fully opaque, and set the scale as a percentage of the page width.
Will the watermark appear on every page?
Yes. The image is placed on all pages of the PDF. If you need the watermark only on certain pages, split the PDF first, watermark the relevant pages, and merge them back.
Does it work on mobile?
Yes, the entire EazyPDFTools website is responsive. You can add an image watermark on iPhone, Android, or iPad using any modern browser.
Conclusion
An image watermark adds a layer of professionalism and brand identity that text alone cannot match. The Add Image Watermark tool on eazypdftools.com puts that capability in your hands, with precise control over opacity, position, and scale, all running securely inside your browser. Because nothing is uploaded, your sensitive documents and logos stay completely private. No sign‑ups, no hidden fees.
Next time you need to brand a PDF with your logo or stamp a confidential notice, skip the downloads and the complicated desktop editors. Just visit this page, drop your document and image, tweak the settings, and get a beautifully watermarked PDF in seconds. We'll keep the tool fast, free, and reliable.