CONFIDENTIAL Stamp for PDF: Free PNG Downloads
By StampAPDF · Updated · How we write guides
Download a free CONFIDENTIAL stamp image below in red, blue, or black. Each PNG has a transparent background and is free for personal or business use.
A CONFIDENTIAL stamp tells the reader how to handle a document: keep it private and do not pass it on. The PDF is stamped in your browser and is not uploaded, which matters for the files that need this mark.
Download a free CONFIDENTIAL stamp PNG
Choose red, blue, or black. Each image is a 1,200 × 480 px PNG with a transparent background. No signup or email required.
Created by StampAPDF. You may download, modify, and use these templates for personal or business documents without attribution.
When to use a CONFIDENTIAL stamp
- Salary and HR documents: Mark offer letters, payslips, and review notes before you send them to the employee.
- Commercial proposals: Mark pricing that is meant for one client only.
- Board and management papers: Mark the cover page and any page with figures that are not public.
- Documents under a confidentiality agreement: Mark what you disclose, so there is no doubt later about which material was covered.
Where to put the stamp
- Put the stamp at the top of the first page, in the header area.
- Repeat it on each page that holds sensitive figures or personal data.
- Do not cover names, account numbers, or the page number.
- Use red when you want the mark to be seen first. Use black when the document will be printed in black and white.
Add the CONFIDENTIAL stamp to a PDF
- Download one of the PNG files above.
- Open the Stamp & Sign tool and choose your PDF. The PDF is opened in your browser and is not uploaded.
- Select Use your own image on this device and pick the PNG. The image also stays on your device.
- Tap the page where the stamp belongs, or use Place in center. Drag the stamp, and resize it with the corner handle or the Stamp width slider.
- Choose Download stamped PDF. The new file has -stamped in its name, and the original is not changed.
Mark every page instead
For a multi-page document, a CONFIDENTIAL text mark on every page is the stronger choice. If one page is printed or forwarded alone, it still carries the warning. Use the watermark tool for that, or read How to stamp all pages of a PDF.
What the stamp does not do
The stamp does not encrypt, lock, or restrict the file. Anyone who has the PDF can open, copy, and forward it. If the content must be protected, add a password in the application that created the file and control who receives it.
More free PDF stamps
The free PDF stamp library has every stamp on one page. These use the same size and the same three colors:
Frequently asked questions
▸Where can I get a CONFIDENTIAL stamp for a PDF for free?
Download one of the three free CONFIDENTIAL stamp PNGs on this page: red, blue, or black, each 1,200 × 480 pixels with a transparent background. No signup or email is needed.
▸Does a CONFIDENTIAL stamp protect my PDF?
No. It is a visible instruction to the reader. It does not encrypt the file or stop copying. Use a password and limit who receives the file when the content needs real protection.
▸Is my confidential PDF uploaded when I stamp it?
No. The PDF is opened, stamped, and exported in your browser. An image you choose with Use your own image on this device also stays on your device. Only an image you add to the optional saved library is uploaded.
▸How do I put CONFIDENTIAL on every page?
Use the watermark tool. It adds a text mark to every page in one action. Use the stamp image when you want the mark in one exact spot, such as the header of the first page.