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Overlay PDF
Lay one PDF over or under another: letterheads, stationery, form backgrounds and stamps.
Free, no uploads, no sign-up. Runs 100% in your browser.
How Overlay PDF works
Pages of the overlay file are embedded as reusable vector objects and drawn behind or in front of each page of the main file with pdf-lib. The overlay is stored once, so files stay small.
Input: PDF. Output: PDF.
How to use Overlay PDF
- Drop your PDF onto the Overlay PDF area, or click to choose it.
- Wait a moment while page thumbnails render locally.
- Choose the pages and options you need. Previews update as you go.
- Press the main action button and download the finished PDF.
Tips
- For a letterhead, choose Behind content and Page 1 on all.
- Scanned pages are solid images. Put the overlay on top with lower opacity instead.
Overlay PDF FAQ
- Are my files uploaded?
- No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.
- Is it free? Are there limits or watermarks?
- Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.
- Does it work offline?
- Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.
Related tools
- Watermark PDF: Stamp text or logo watermarks with opacity, rotation and tiling.
- Merge PDF: Combine multiple PDFs into one ordered document with drag-and-drop sorting.
- Header & Footer: Add running headers and footers with dates, titles and page tokens.
- Split PDF: Split by ranges, every N pages, or extract each page into a ZIP.