Add PDF Watermark

Place a diagonal text watermark on each page of a PDF.

Drop files here or choose files1 PDF file · Maximum 60 MB per file, 25 files

Choose 1 pdf file to begin.

How to use add pdf watermark

Select input files, choose any options, click Process on my device, then download and verify the output. Files remain in the current browser session unless you download them.

What this tool does

Place a diagonal text watermark on each page of a PDF. This version adds a visible ASCII-text mark. It is not secure redaction.

Privacy, file support and limitations

Your document is read in the current browser tab and is not sent to our server. Files are not automatically saved for later recovery. Current limit: 60 MB per file; phone memory may impose lower practical limits. Browser PDF operations can affect advanced structure and digital signatures; do not use a modified PDF as though its existing signature remains valid.

Frequently asked questions

Do I need an account?

No. This tool is available without registration.

Will my PDF be uploaded?

No. The current implementation performs this operation locally in your browser. The page loads application code and libraries from our own domain, but does not upload the PDF bytes.

Can I use this for a confidential document?

Processing is local, but your device and installed browser extensions can affect privacy. Avoid untrusted browser extensions and verify the output before sharing.