Add Watermark to PDF
Runs in your browser. Your files never leave your device.
How we keep your files private
How to use Add Watermark to PDF
- Add your PDF.
- Type the watermark text and choose opacity.
- Download the watermarked PDF.
Common uses
- Marking drafts as CONFIDENTIAL.
- Discouraging reuse of documents.
- Labelling versions.
About this tool
Place diagonal grey text across every page of a PDF. The size adapts to the page and the opacity is adjustable. Uses the standard Helvetica Bold font.
Next steps
Frequently asked questions
Which characters work?
Latin characters; other scripts are replaced with ?.
Can the watermark be removed?
It is drawn on the page, so it is not trivial to remove, but it is not a security feature.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device, so your files and text are never sent anywhere.
Is it really free?
Yes. There is no sign-up, no watermark and no limit on how often you use it.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers. Very large files may be slow on older phones.
Does it work offline?
Once the page has loaded, most tools keep working without a connection, because processing happens on your device.