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Add Watermark to PDF Online Free
Add text or image watermarks to your PDF documents with customizable position, transparency, and formatting
Drop PDF file here or click to browse
Supports PDF files up to 50MB
Adding watermark to your PDF...
This may take a moment depending on your PDF size.
Upload your PDF, choose an image or logo, place it using a simple 3×3 grid, set transparency and rotation, then click Add watermark to download your watermarked PDF in seconds. Everything runs in your browser for speed and privacy.
What the Image Watermark Tool Does
This tool helps you add image watermarks to your PDFs instantly. You can place a logo or graphic on selected pages, control transparency, choose rotation, and position it with pixel-clean accuracy. Because it works inside your browser, your files never leave your device. It’s perfect for creators, teams, and teachers who want quick branding or protection without installing software.
The interface mirrors a real production workflow. You upload, preview page tiles on the left, and adjust settings in a focused control panel on the right. When you’re happy, you apply the watermark and get a neat confirmation block with a download button.
Key Features for Watermarking
- Place image watermarks on any page range with instant previews.
- Tabs for Place text and Place image so you can switch styles as needed.
- 3×3 position grid to anchor the watermark at top, middle, or bottom areas.
- Transparency presets from light to bold so the content stays readable.
- Rotation options including Do not rotate for static marks or angled looks.
- Two stacking modes: Over the PDF or Below the PDF.
- Range selectors to apply the image from page X to page Y only.
- Fast, private processing in the browser. No uploads to servers.
- Clear success screen with “Watermark added successfully!” and a single click to download.
How to Use the Tool Step-by-Step
The layout is clean and predictable, so you can move fast even on your first run. Follow this sequence to add an image watermark without guesswork.
- Upload your PDF: Use the large input at the top or drag and drop. The left side fills with thumbnail tiles for each page.
- Switch to Place image: In the right panel tabs, select Place image so you’re working with logos or graphics rather than text.
- Add your image: Click ADD IMAGE to pick a PNG or JPG. A preview appears beneath, confirming it’s loaded.
- Choose position: Use the 3×3 grid to anchor the watermark. Middle center works well for review copies. Bottom right is popular for subtle branding.
- Set transparency: Pick a preset such as 50% or 70%. Lower values keep body text visible while the watermark remains noticeable.
- Pick rotation: The dropdown offers options including Do not rotate. Slight angles can reduce copying while staying readable.
- Select pages: Use range fields labeled from page and to page to target where the image appears.
- Stacking mode: In the Add watermark section, choose Over the PDF for a visible overlay or Below the PDF for a subtle background effect.
- Apply: Click the primary Add watermark button. Processing takes moments.
- Download: You’ll see the success block that says “Watermark added successfully!” Click Download Watermarked PDF to save.
If something looks off, adjust transparency or position and run again. Because the tool is fast and local, iteration is quick.
Benefits of Adding an Image or Logo Watermark
- Brand protection: Make ownership clear on brochures, ebooks, and design proofs.
- Review labeling: Mark drafts and classroom handouts without disturbing the content.
- Professional trust: Consistent logo placement signals quality and authenticity.
- Flexible control: Choose exact pages, positions, angles, and transparency for any context.
- Zero upload risk: Sensitive PDFs stay on your device. Close the tab when done.
The result is clean and predictable. Readers can still scan text easily while your brand or notice remains visible and hard to ignore.
Real Example — brand logo watermark across selected pages
Here’s a quick scenario that mirrors typical publishing needs. You have a 22 page catalog. You want a center watermark on pages 3 through 18 to cover the main product area while leaving the cover and index clean. Load your logo, pick the middle cell in the 3×3 position grid, choose 50% transparency, and set rotation to 45°. In the Add watermark section, select Below the PDF so the logo sits under text and images. Set the page range from 3 to 18, click Add watermark, then download. The pages look branded, readable, and consistent.
Related Tools for PDF Editing
Round out your workflow with these handy utilities from SanishTech:
Use them in any order. For example, compress after watermarking to keep file size friendly for email and LMS uploads.
Pro Tips for Crisp, Non-intrusive Watermarks
- Use PNG with transparency for logos. It sits cleanly over photos and charts.
- Pick 40 to 60 percent transparency for long reading. It keeps text legible.
- Center placement is versatile. Bottom right feels editorial and subtle.
- Try light gray on dark footers and medium gray on light pages for balance.
- Preview spreads by paging through thumbnails to check repetition and rhythm.
- Use Below the PDF when you want the brand present but not loud.
- Rotate lightly for review copies to discourage screenshots without blocking data.
- Keep margins in mind so the watermark avoids signatures or crucial notes.
FAQ
Does the tool upload my PDF to a server?
No. All processing happens locally in your browser. Your file never leaves your device, which means you can watermark confidential contracts, classroom packs, and internal drafts without risking exposure. When you finish, close the tab to end the session. This private approach is also faster because it skips network transfers entirely.
Which image formats work best for a logo watermark?
PNG and JPG are ideal. PNG is great for logos with transparent backgrounds because it blends well with both photos and white body text areas. If your image is a flat rectangle, JPG is fine. For sharp results, use at least 800 pixels on the long edge so scaling looks clean across common page sizes like A4 and Letter.
Can I apply watermarks to only certain pages?
Yes. Use the range controls labeled from page and to page to target exactly where the watermark appears. You might apply it only to body pages and exclude the cover, index, or appendix. The thumbnails on the left help you quickly confirm which section you are affecting before hitting Add watermark.
What’s the difference between Over the PDF and Below the PDF?
Over the PDF places the image on top of content so it’s clearly visible on every page element. Below the PDF sets it under content, acting like a background mark that stays subtle behind text and images. For reading comfort, many users pick Below the PDF with medium transparency and a center or diagonal placement.
How do I keep text readable under a watermark?
Dial in transparency between 40 and 60 percent and avoid pure black or pure white. Medium gray blends with a wide range of page colors. If your document has dense tables, consider Below the PDF with a lighter shade. You can always run a quick test on two or three pages, then adjust and reapply.
Can I rotate the watermark for a diagonal look?
Yes. The Rotation dropdown includes options like Do not rotate as well as angled choices. A slight diagonal helps deter copying and screenshot reuse without overwhelming readers. Combine a 45 degree rotation with 50 percent transparency for a classic “review copy” appearance that looks professional across long documents.
Is there a limit on file size or page count?
The tool is optimized for practical, everyday PDFs. If you’re working with very large files, process in sections by page range. Because everything runs in your browser, performance depends on your device memory and the complexity of pages. The thumbnail grid lets you confirm batches before applying the watermark again.
Will the watermark change my existing links or text?
No. Your content remains intact. The watermark is an added image layer applied according to your position and stacking choices. Bookmarks, hyperlinks, and selectable text remain as they were. After processing, you’ll see the success message and can download the updated PDF with your original structure preserved.
Can I use the tool for classroom or internal sharing?
Absolutely. Many users add a logo or class mark on handouts, quizzes, and course packs so files aren’t reposted without context. Teams add “Internal Use Only” images during review rounds. With page ranges, you can protect only the critical sections and keep front matter clean for readability.
What if my logo looks too strong or too faint?
Adjust transparency and position, then apply again. Moving from 70 percent to 50 percent often fixes heavy marks. If a page has a dark footer, try a lighter logo or shift to center. Because processing is local and fast, you can test two or three variants and keep the one that reads best.
Add Image Watermark to PDF Online Free is built for practical, real-world tasks. It keeps your documents readable, your brand visible, and your workflow quick. Try the center placement with moderate transparency first. Then refine by rotation, page range, and stacking mode until the pages feel exactly right.