Watermark PDF
Add a text watermark to every PDF page with opacity and rotation controls.
About this watermark pdf
Watermark PDF stamps text across every page of a document, with control over the opacity and rotation. It is the quick way to mark a file as Draft, Sample, Confidential, or anything else before it is shared or reviewed.
A readable watermark sits lightly over the content rather than obscuring it, so a lower opacity and a short phrase usually work best. Rotation makes a diagonal mark stand out on busy pages. The watermark is applied to a downloadable copy, so the original PDF stays clean.
Common uses
- Add draft, sample, confidential, or review text across PDF pages.
- Control watermark opacity and rotation for readable document protection.
- Prepare proofs, shared drafts, reports, and samples before sending.
Helpful tips
- Keep opacity around 0.1 to 0.5 for readable pages; very high values are capped so the text stays legible
- Keep watermark text short
- Use rotation for draft or sample marks that should stand out
How to use Watermark PDF
- Upload the PDF or source files needed for watermark pdf.
- Review the page, file, format, or output options before running the tool.
- Use the preview, status message, or output summary to confirm the result looks right.
- Download the finished file and keep the original file until you have checked the new version.
- Use related PDF tools when the document needs another cleanup step such as merge, split, compress, rotate, or edit.
Frequently asked questions
Can I add a text watermark to a PDF?
Yes. Enter watermark text, choose opacity and rotation, then download the watermarked PDF.
What opacity should I use for a PDF watermark?
A lower opacity usually keeps the document readable while still marking it as draft, sample, or confidential.
Is Watermark PDF free, and does it work on mobile?
Yes. Watermark PDF is free to use on JustBloc with no account or installation, and the page is designed to work on desktop, tablet, and mobile browsers.