PDF Overlay
1. Upload Content PDF
The text/content you want to stamp
No file selected
2. Upload Overlay PDF
e.g. Letterhead, Form Background
No file selected
Overlay Settings
The first page of the Overlay PDF will be applied to all pages of the Content PDF.
Combine your documents like layers in Photoshop. Our PDF Overlay Tool allows you to "stamp" one PDF on top of another. It's the perfect solution for applying letterheads, background branding, or filling out uneditable forms.
What is PDF Overlaying?
Also known as "compositing," this process takes a source page (like a company letterhead) and paints it onto every page of a destination document (like a plain invoice). The result is a single PDF file that looks like it was printed on your official stationery.
How it Works
We take the Content PDF (your text) and the Overlay PDF (your design). Using advanced blending modes, we merge them together. You can choose to place the overlay in the background (under text) or foreground (over text), ensuring perfect formatting.
How to Apply a PDF Letterhead
- Upload Content: Choose your multi-page document (contracts, reports).
- Upload Overlay: Choose your single-page design PDF (logo, footer, border).
- Position: Select "Stretch to Fit" for full-page backgrounds or "Align Top" for headers.
- Merge: Download the combined document.
Powerful Features
- Opacity Control: Make your overlay semi-transparent to act as a watermark.
- Smart Positioning: Automatically centers logos or aligns footers to the bottom of the page.
- Vector Quality: Maintains the crispness of your logos and text; no blurry images.
Specifications
- Input: Two PDF files.
- Output: Merged PDF.
- Logic: Page 1 of Overlay is applied to All Pages of Content.
Who Needs This?
- Business: Applying official company branding to invoices generated by generic software.
- Legal: Adding a "Confidential" stamp or exhibit sticker to evidence files.
- Engineers: Overlaying new architectural plans on top of old ones to visualize changes.
Private & Secure
Your proprietary designs stay yours. Everything happens in your browser. Neither your content document nor your letterhead template is ever sent to our servers.
Free vs Premium
Free Version: Overlay standard documents.
Premium Version: (Future) Apply different overlays to the first page vs. subsequent
pages.
Frequently Asked Questions
Can I use an image file instead of a PDF?
For image files (JPG/PNG), please use our Add Background tool instead.
Does it cover the text?
If the overlay is opaque (100% opacity), it might cover text underneath. Use the transparency slider or ensure your overlay PDF has a transparent background.
Related Tools
Need something else? Add Background for simple image watermarks, Bates Numbering for sequential labeling, or Merge PDF to join files end-to-end instead of on top of each other.
Quick Summary
PDFPlug Overlay Tool is the professional way to brand your documents post-creation.
Last updated: January 2026