Quick answer
What is Overlay PDF used for?
Purpose
What does Overlay PDF do?
Use Overlay PDF to choose a base PDF and an overlay PDF, place letterhead, draft marks, or repeated pages over the original. Both files remain local and page matching is performed before a combined copy is exported. Filozy starts the document engine only after you choose a file, performs the work inside this tab, and creates a new result for you to save. Your selected document, its filename, and its contents are not sent to Filozy.
Who normally uses it?
This guide is useful for people adding visible information, branding, numbering, print layouts, or reusable page content. The working tool is focused on one outcome: Lay one PDF over another — letterhead, a draft mark, a stamp.
Prepare
Before you start
- Plan the pages, position, text, color, and size before applying a repeated change.
- Keep important text inside a safe margin so printers and page crops do not hide it.
- Work on a copy when the output will make comments, fields, or additions permanent.
Step by step
How do I use Overlay PDF?
- 01
Choose a base PDF and an overlay PDF
Select a base PDF and an overlay PDF from the dropzone. Filozy reads it locally and shows the relevant preview or controls before changing anything.
- 02
Review the settings
Use the page preview and available options to decide exactly how overlay pdf should handle this document.
- 03
Create and check the result
Run the tool, review the reported page count, size, or notes, then save the newly created file while keeping the original.
Better results
Practical tips for Overlay PDF
Use the page preview at a larger zoom for precise placement.
Keep typography, spacing, color, and position consistent across repeated pages.
Open the exported PDF and inspect the first, middle, and last affected pages.
Honest expectations
Limitations and important checks
The result depends on the structure and quality of the source document, so visually inspect the exported file before relying on it.
Browser memory varies by device. Very large or unusually complex PDFs may work better when processed in smaller groups.
Questions and answers
Overlay PDF FAQ
Direct answers to the questions people commonly ask before using this tool.
What is Overlay PDF used for?
Overlay PDF is a browser-based Filozy tool built for this task: Lay one PDF over another — letterhead, a draft mark, a stamp. It runs on this device, creates a separate result, and does not require an account or document upload.
Can I use Overlay PDF on a phone or tablet?
Yes. Overlay PDF works in a current mobile browser. Complex PDFs can need more memory, so keep the tab open, avoid switching apps during processing, and inspect the result before closing the page.
Does Overlay PDF upload my file?
No. The selected file is opened and processed by code running in this browser tab. Document bytes and filenames are not sent to Filozy.
Will this change my original file?
No. Browsers cannot silently overwrite the file you selected. Filozy creates a separate result for you to save or pass to another local tool.
What should I check after using Overlay PDF?
Check the visible preview and the result summary. Both files remain local and page matching is performed before a combined copy is exported. Keep the original until the new output has been opened and verified.
Do I need an account or subscription?
No account is required for this browser-side tool. It runs on the device and does not use a document-upload allowance or daily server quota.
Privacy
Where does my document go?
For this tool, the document stays in the browser tab. Filozy can load same-origin support files such as its PDF engine, fonts, or OCR data, but the selected document bytes and filename are not sent with those requests.