PDF Overlay & Letterhead
Local Processing (Offline Capable)Overlay or underlay official letterheads, templates and stationery onto your PDF pages with customizable opacity and page ranges. Private and fully client-side.
How this tool works (no sign-up needed)
- Upload your file above. Each tool shows whether it runs Local (in your browser) or Cloud (encrypted servers).
- Adjust options, then click the Run / Convert / Process button.
- Wait for progress, then download the result. Use Next tools to continue.
If buttons are not visible, enable JavaScript — the interactive workspace loads in your browser.
Free · 100% LocalOverlay or underlay templates, letterheads, and official stationery onto your PDFs
Supports .pdf,application/pdf
Supports .pdf,.png,.jpg,.jpeg,application/pdf,image/png,image/jpeg
Local — your file is processed in your browser and not uploaded to us. No account needed.
What is it?PDF Overlay & Letterhead is a PDFLean security & privacy tool: Overlay or underlay official letterheads, templates and stationery onto your PDF pages with customizable opacity and page ranges.
TL;DR: Overlay or underlay official letterheads, templates and stationery onto your PDF pages with customizable opacity and page ranges. Everything runs locally in your browser — your file is never uploaded; standard PDF, PNG, and JPG templates are supported.
About this tool
No accounts, no uploads, no watermarks — just the operation you came for. Overlay or underlay official letterheads, templates and stationery onto your PDF pages with customizable opacity and page ranges. Private and fully client-side. Processing runs locally in your browser's memory — the document is never transmitted, and closing the tab clears it completely. The workflow is deliberately short: load the file, choose the options on the page, run the operation, and save the result. Every choice is applied before the file is written, so re-running with different settings takes seconds. Supported templates include PDF, PNG, and JPG; outputs a new PDF. Practical limits apply (see the on-page limits); it pairs well with the related tools linked beside this page when one step is not the whole job. Key facts — Processing: runs entirely in your browser, client-side; Access: free with no account required; File limits: see the on-page limits; Privacy: the file never leaves the device.
How to use
Upload your main PDF document and your letterhead template (PDF, PNG, or JPG)
Choose layer mode: Underlay (behind content) or Overlay (on top of content)
Set page scope (all pages or first page only) and adjust opacity
Click "Apply Template" to generate and download your official document
FAQ
What is the difference between Underlay and Overlay?
Underlay places your template behind existing content, ideal for corporate letterheads. Overlay places the template on top of existing content, ideal for official stamps, headers, and seals.
Can I apply the letterhead only to the first page?
Yes! Simply select 'First Page Only' to stamp the official header on page 1 while leaving following pages untouched.
Must overlay templates be PDF, or are images supported too?
Both single-page PDF templates and high-resolution PNG/JPG images are supported for letterheads, stamps, or security watermarks.
How are differences in paper size between the template and content handled?
The template automatically fills the full dimensions of the target page (multiple alignment strategies are not supported); creating templates with the same aspect ratio as target pages is recommended.
Can I adjust the opacity of the overlaid letterhead or watermark?
Yes. Opacity is adjustable from 10% to 100% in 5% steps, letting you blend watermarks or logos smoothly without impairing document legibility.