Is it safe to watermark confidential files online?

With this tool the file never leaves your device. The page loads code into your browser and the watermark is applied there, with no upload.

Can I use my own text?

Yes. Replace CONFIDENTIAL with any text, such as INTERNAL ONLY or your company name, before processing.

Do you store or retain my processed files?

No. Online PDF Editor processes files in your browser using local memory. Your files are not uploaded to our servers, and closing the browser tab clears them from the tool.

Online PDF EditorPDFEditor

Add Watermark

Mark a PDF as CONFIDENTIAL

Stamp CONFIDENTIAL across PDF pages to signal restricted documents.

Add CONFIDENTIAL Watermark to PDF labels sensitive documents such as contracts, financial statements, and HR files so recipients know they must not be shared. The watermark is added locally in your browser, which matters when the document itself is confidential.

Drop PDF file here

Stamp CONFIDENTIAL across PDF pages to signal restricted documents.

PDF files are processed only on this device.

Choose PDF

Your files never leave your browser.

How to add CONFIDENTIAL Watermark to PDF

Stamp CONFIDENTIAL across PDF pages to signal restricted documents. Select your file, check the preset options, review the result, and download it. Processing happens in your browser.

How to add CONFIDENTIAL Watermark to PDF

Select or drop the file you want to process.
Choose the pages and options that fit your task.
Run the operation and wait for the browser to finish.
Review the result before saving or sharing it.
Download the processed file to your device.

Why use this tool?

This browser-based workflow is useful for preparing PDF documents while keeping the source file on your device.