PDF Overlay Tool
A free, secure, and fast way to combine two PDF files by overlaying one on top of the other.
Upload & Configure
Drag & Drop your Base PDF here
or
Drag & Drop your Overlay PDF here
or
Preview & Download
Upload PDF files to see preview
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How to Overlay PDFs in 3 Steps
1. Select Your PDFs
Upload your base PDF and the overlay PDF. The files are processed securely in your browser, **never uploaded** to any server.
2. Customize Settings
Adjust the overlay opacity, position, and page alignment to get the perfect combination of your documents.
3. Process & Download
Click "Process Overlay" and download your combined PDF. Your new document will be generated instantly for you to download.
Your Security is Our Priority
100% Private & Secure
Your PDFs are processed entirely in your browser. No files are ever uploaded to a server, guaranteeing your data's privacy.
Instant, Browser-Based
Because there are no uploads, the overlay process is instant. Your combined PDF is ready as soon as you click the button.
Completely Free
Overlay unlimited PDF files for free. No watermarks, no limits, and no registration required.
Frequently Asked Questions
Is it safe to overlay confidential PDFs with this tool?
Yes. This tool is **100% secure**. All processing happens locally in your web browser. Your PDF files are never uploaded to any server, so your sensitive information remains completely private.
What's the difference between PDF overlay and PDF merging?
PDF merging combines pages from different documents sequentially, while PDF overlay places one PDF on top of another, creating a layered effect. Overlay is perfect for adding watermarks, signatures, or annotations to existing documents.
Can I overlay multiple pages from the overlay PDF?
Yes. You can choose to match pages (page 1 overlays page 1, page 2 overlays page 2, etc.), overlay the first page on all pages, or overlay only on the first page of the base document.
What file size limitations are there?
There are no specific file size limitations, but very large PDFs may take longer to process depending on your device's capabilities. For best performance, we recommend files under 100MB.