Add Watermark
Stamp text across every page as a watermark.
- 100% Private
- No Limits
- Works Offline
or drag and drop here
Stamp text like "CONFIDENTIAL" or "DRAFT" diagonally across every page. Runs locally in your browser — the document is never uploaded.
How to use this tool
- 1
Upload your PDF
Click the upload area or drag in the document you want to watermark.
- 2
Type your watermark text
Enter the text you want stamped across every page.
- 3
Adjust opacity
Choose how faint or bold the watermark appears over your content.
- 4
Apply and download
Your watermarked PDF downloads immediately — nothing is uploaded first.
Why use this tool
Nothing leaves your device
The watermark is drawn locally via WebAssembly — your document is never uploaded.
Every page, automatically
No need to stamp pages one at a time — it applies to the whole document at once.
Control the opacity
Keep the watermark subtle or make it bold, depending on how it's used.
Common use cases
Mark confidential documents
Stamp "CONFIDENTIAL" across a draft before sharing it internally.
Label a draft
Add "DRAFT" so no one mistakes a work-in-progress for the final version.
Claim ownership
Add your name or company across sample work before sending it to a client.
Pro tips
- Lower opacity (10-20%) keeps content readable underneath a watermark.
- Short text reads more clearly at a diagonal than long sentences.
- Flatten PDF afterward if you need to make sure the watermark can't be removed by editing form layers.