PDF Security
Add Watermark
Apply a text watermark to every page.
Preview
Page 1
preview will appear here!
Simulated on page 1 to show opacity + rotation.
Watermark
Watermark text
Opacity
0.10–0.25 looks professional.
Rotation
Try 30–45 for diagonal.
Font size
Large = better visibility.
File
—
Opacity
0.20
Rotation
35°
Tip: Keep opacity low and use diagonal rotation for clean watermarking.
Stamp a custom text watermark such as “Confidential” or “Draft” across your PDF, with control over opacity and angle. It is all done locally, so your file stays private.
How to add watermark
- Select the PDF you want to watermark.
- Type your watermark text and set opacity and rotation.
- Apply the watermark to every page.
- Download your watermarked PDF.
Frequently asked questions
How do I add a confidential watermark to a PDF?
Type your text (for example “Confidential”), set the opacity and angle, then apply it across the document.
Can I control how transparent the watermark is?
Yes. You can adjust opacity and rotation so the watermark is visible without hiding your content.
Is my document uploaded to add a watermark?
No. The watermark is applied in your browser, so your file never leaves your device.
🔒 100% private: this tool runs entirely in your browser. Your files are never uploaded — they never leave your device.