Good uses
- Mark a review copy as DRAFT or CONFIDENTIAL.
- Add a visible status label before circulating a PDF.
PDF Tools
Add watermark to PDF
Add a text watermark to every PDF page in your browser. The source file stays on your device.
Runs in your browser ยท Files stay on your device
Waiting
Runs in your browser. Files do not leave your device.
Input
Add watermark to PDF. Process files locally in your browser. Nothing is uploaded.
Drop files hereUp to 25MB each and 75MB per batch.DropBrowsePaste
Tool notes
Before you share
Result What you get
Place a diagonal text watermark across every PDF page.
Input
Output
Steps Run order and common questions
- Choose one PDF and enter the watermark text.
- Add the diagonal watermark locally across every page.
- Download the result and inspect both portrait and landscape pages.
Use it well Examples, checks, limits, and recovery paths
Bad inputs
- Using a watermark as access control or document encryption.
- Expecting image watermarks, per-page positioning, or custom typography.
Output checklist
- Open portrait and landscape pages to confirm the watermark remains legible.
- Check that the label does not obscure signatures, totals, or required fields.
Failure modes
- Very long text can extend beyond narrow pages.
- A visible watermark can be altered by a determined PDF editor.
Runtime limits
- Runs locally in the browser without uploading the PDF.
- Password-protected and malformed PDFs are rejected.
- Large or complex PDFs can exceed browser memory limits.
- Adds one diagonal text watermark to every page.